About the JavaScript reference - JavaScript
the javascript reference serves as a repository of facts about the javascript language.
...as you write javascript code, you'll refer to these pages often (thus the title "javascript reference").
... if you're learning javascript, or need help understanding some of its capabilities or features, check out the javascript guide.
...And 11 more matches

JavaScript — Dynamic client-side scripting - Learn web development
javascript is a programming language that allows you to implement complex things on web pages.
... every time a web page does more than just sit there and display static information for you to look at—displaying timely content updates, interactive maps, animated 2d/3d graphics, scrolling video jukeboxes, or more—you can bet that javascript is probably involved.
... get started prerequisites javascript is arguably more difficult to learn than related technologies such as html and css.
...And 10 more matches

Object.getOwnPropertyDescriptors() - JavaScript
the object.getownpropertydescriptors() method returns all own property descriptors of a given object.
... syntax object.getownpropertydescriptors(obj) parameters obj the object for which to get all own property descriptors.
... return value an object containing all own property descriptors of an object.
...And 10 more matches

JavaScript typed arrays - JavaScript
javascript typed arrays are array-like objects that provide a mechanism for reading and writing raw binary data in memory buffers.
... as you may already know, array objects grow and shrink dynamically and can have any javascript value.
... javascript engines perform optimizations so that these arrays are fast.
...And 9 more matches

handler.getOwnPropertyDescriptor() - JavaScript
the handler.getownpropertydescriptor() method is a trap for object.getownpropertydescriptor().
... syntax const p = new proxy(target, { getownpropertydescriptor: function(target, prop) { } }); parameters the following parameters are passed to the getownpropertydescriptor() method.
... prop the name of the property whose description should be retrieved.
...And 7 more matches

Reflect.getOwnPropertyDescriptor() - JavaScript
the static reflect.getownpropertydescriptor() method is similar to object.getownpropertydescriptor().
... it returns a property descriptor of the given property if it exists on the object, undefined otherwise.
... syntax reflect.getownpropertydescriptor(target, propertykey) parameters target the target object in which to look for the property.
...And 7 more matches

Intl.Locale.prototype.script - JavaScript
the intl.locale.prototype.script property is an accessor property which returns the script used for writing the particular language used in the locale.
... description a script, sometimes called writing system, is one of the core attributes of a locale.
...for instance, the script associated with english is latin, whereas the script typically associated with korean is hangul.
...And 6 more matches

MSManipulationEvent.initMSManipulationEvent() - Web APIs
the initmsmanipulationevent method is used to create a msmanipulationevent that can be called from javascript.
... syntax msmanipulationevent.initmsmanipulationevent(typearg, canbubblearg, cancelablearg, viewarg, detailarg, laststate, currentstate); parameters typearg [in] type: domstring the type of the event being created.
... laststate [in] type: integer indicates the last state of the manipulation event.
...And 3 more matches

JavaScript Tips
xul tips when inserting code with an xul overlay, wrap functions and variables inside an object with a unique name to avoid conflicting with existing or future function and variable names.
...for instance the offline observer declared above is a javascript object that is registered with an xpcom object, so that the call back from xpcom executes the javascript method.
...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) { } } when declaring xpcom methods, try to use the same names for method parameters as are used in the interface definition.
...And 2 more matches

MathML Demo: <mmultiscripts> - attach prescripts and tensor indices to a base
a mathml mmultiscripts object allows you to build tensor-like objects.
...the scripts come in pairs, with <mprescripts/> used to indicate prescripts and <none/> used to hold an empty position as in f b a .
... there are some variations possible: <mmultiscripts> a a b c d , nested <msubsup>s a a b c d , or &invisiblecomma; a a ⁣ c b ⁣ d .
...And 2 more matches

JavaScript reference - JavaScript
this part of the javascript section on mdn serves as a repository of facts about the javascript language.
... built-ins javascript standard built-in objects, along with their methods and properties.
...ion intl intl.collator intl.datetimeformat intl.displaynames intl.listformat intl.locale intl.numberformat intl.pluralrules intl.relativetimeformat webassembly webassembly webassembly.module webassembly.instance webassembly.memory webassembly.table webassembly.compileerror webassembly.linkerror webassembly.runtimeerror statements javascript statements and declarations control flowblock break continue empty if...else switch throw try...catch declarations var let const functions and classes function function* async function return class iterations do...while for for each...in for...in for...of for await...of while other debugger import label with ...
...And 2 more matches

Trigger Scripts and Install Scripts - Archive of obsolete content
trigger scripts and install scripts trigger scripts are simple installations that can be initiated from event handlers and other javascript code on a web page.
... install scripts use the install, file, installversion and platform-specific installation object methods to initialize, queue, manage, and perform the installation of one or more software packages.
... these install scripts are typically located at the top level of the xpi archives in which the installations are stored.
... a trigger script may trigger the downloading of a xpi, which in turn will use its own install.js script to manage the complete installation.

Enumerability and ownership of properties - JavaScript
ownership of properties is determined by whether the property belongs to the object directly and not to its prototype chain.
... property enumerability and ownership - built-in methods of detection, retrieval, and iteration functionality own object own object and its prototype chain prototype chain only detection enumerable nonenumerable enumerable and nonenumerable propertyisenumerable hasownproperty hasownproperty – filtered to exclude enumerables using propertyisenumerable ...
... enumerable nonenumerable enumerable and nonenumerable for..in (excluding symbols) not available without extra code not available without extra code not available without extra code obtaining properties by enumerability/ownership note that this is not the most efficient algorithm for all cases, but useful for a quick demonstration.
... }); } if (!iterateprototypebool) { break; } iterateselfbool = true; } while (obj = object.getprototypeof(obj)); return props; } }; detection table in for..in obj.hasownproperty obj.propertyisenumerable object.keys object.getownpropertynames object.getownpropertydescriptors reflect.ownkeys() enumerable true true true true true true true true nonenumerable true false true false false true true true symbols keys true false true true false false true true inherited enumerable true true false false false false false false ...

JavaScript Guide - JavaScript
the javascript guide shows you how to use javascript and gives an overview of the language.
... if you need exhaustive information about a language feature, have a look at the javascript reference.
... chapters this guide is divided into several chapters: introduction about this guide about javascript javascript and java ecmascript tools hello world grammar and types basic syntax & comments declarations variable scope variable hoisting data structures and types literals control flow and error handling if...else switch try/catch/throw error objects loops and iteration for while do...while break/continue for..in for..of functions defining functions calling functions function scope closures arguments & parameters arrow functions expressions and operators assignment & comparisons arithmetic operators bitwise & logical operators conditional (ternary) operator numbers and dates ...
...reating objects defining methods getter and setter details of the object model prototype-based oop creating object hierarchies inheritance promises guarantees chaining error propagation composition timing iterators and generators iterators iterables generators meta programming proxy handlers and traps revocable proxy reflect javascript modules exporting importing default exports renaming features aggregating modules dynamic module loading next » ...

JavaScript error reference - JavaScript
below, you'll find a list of errors which are thrown by javascript.
... for a beginner's introductory tutorial on fixing javascript errors, see what went wrong?
... troubleshooting javascript.
...ignment to const "x"typeerror: property "x" is non-configurable and can't be deletedtypeerror: setting getter-only property "x"typeerror: variable "x" redeclares argumenturierror: malformed uri sequencewarning: 08/09 is not a legal ecma-262 octal constantwarning: -file- is being assigned a //# sourcemappingurl, but already has onewarning: date.prototype.tolocaleformat is deprecatedwarning: javascript 1.6's for-each-in loops are deprecatedwarning: string.x is deprecated; use string.prototype.x insteadwarning: expression closures are deprecatedwarning: unreachable code after return statement ...

Symbol.prototype.description - JavaScript
the read-only description property is a string returning the optional description of symbol objects.
... description symbol objects can be created with an optional description which can be used for debugging but not to access the symbol itself.
... the symbol.prototype.description property can be used to read that description.
... examples using description symbol('desc').tostring(); // "symbol(desc)" symbol('desc').description; // "desc" symbol('').description; // "" symbol().description; // undefined // well-known symbols symbol.iterator.tostring(); // "symbol(symbol.iterator)" symbol.iterator.description; // "symbol.iterator" // global symbols symbol.for('foo').tostring(); // "symbol(foo)" symbol.for('foo').description; // "foo" specifications specification ecmascript (ecma-262)the definition of 'get symbol.prototype.description' in that specification.

IPC Protocol Definition Language (IPDL)
ipdl, short for "ipc (inter-process communication) protocol definition language", is a mozilla-specific language allowing c++ code to pass messages between processes or threads in an organized and secure way.
... all messages for multi-process plugins and tabs in firefox are declared in the ipdl language.
... current docs ipdl tutorial quick start: creating a new protocol quick start: extending a protocol ipdl type serialization ipdl best practices ipdl glossary pbackground future planned docs ipdl language reference error and shutdown handling in ipdl protocols how ipdl uses processes, threads, and sockets ipdl shared memory ...

PR ConvertIPv4AddrToIPv6
converts an ipv4 address into an (ipv4-mapped) ipv6 address.
... syntax #include <prnetdb.h> void pr_convertipv4addrtoipv6( pruint32 v4addr, pripv6addr *v6addr ); parameters the function has the following parameters: v4addr the ipv4 address to convert into an ipv4-mapped ipv6 address.
...v6addr a pointer to a buffer, allocated by the caller, that is filled in with the ipv6 address on return.

PushSubscription.subscriptionId - Web APIs
the endpoint read-only property of the pushsubscription interface returns a domstring containing the subscription id associated with the push subscription.
... syntax var subid = pushsubscription.subscriptionid; specifications specification status comment push api working draft initial definition browser compatibility the compatibility table on this page is generated from structured data.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetsubscriptionidchrome full support 42edge full support ≤18firefox no support noie no support noopera full support 29safari no support nowebview android no support nochrome android ful...

Warning: JavaScript 1.6's for-each-in loops are deprecated - JavaScript
the javascript warning "javascript 1.6's for-each-in loops are deprecated; consider using es6 for-of instead" occurs when a for each (variable in obj) statement is used.
... message warning: javascript 1.6's for-each-in loops are deprecated; consider using es6 for-of instead error type warning what went wrong?
... javascript 1.6's for each (variable in obj) statement is deprecated, and will be removed in the near future.

Pipeline operator (|>) - JavaScript
the experimental pipeline operator |> (currently at stage 1) pipes the value of an expression into a function.
... examples chaining function calls the pipeline operator can improve readability when chaining several functions.
... const double = (n) => n * 2; const increment = (n) => n + 1; // without pipeline operator double(increment(double(double(5)))); // 42 // with pipeline operator 5 |> double |> double |> increment |> double; // 42 specifications specification pipeline operatorthe definition of 'pipeline operator' in that specification.

grippytooltiptext - Archive of obsolete content
« xul reference home grippytooltiptext seamonkey only type: string the text to appear on the tooltip for the toolbar's grippy when the toolbar is collapsed.
... this would be used to label the grippy so that the user knows which toolbar it represents.

ClipboardEvent.clipboardData - Web APIs
the clipboardevent.clipboarddata property holds a datatransfer object, which can be used: to specify what data should be put into the clipboard from the cut and copy event handlers, typically with a setdata(format, data) call; to obtain the data to be pasted from the paste event handler, typically with a getdata(format) call.
... syntax data = clipboardevent.clipboarddata specifications specification status comment clipboard api and eventsthe definition of 'clipboardevent.clipboarddata' in that specification.

Multiplication (*) - JavaScript
the multiplication operator (*) produces the product of the operands.
... syntax operator: x * y examples multiplication using numbers 2 * 2 // 4 -2 * 2 // -4 multiplication with infinity infinity * 0 // nan infinity * infinity // infinity multiplication with non-numbers 'foo' * 2 // nan specifications specification ecmascript (ecma-262)the definition of 'multiplication operator' in that specification.

Multiplication assignment (*=) - JavaScript
the multiplication assignment operator (*=) multiplies a variable by the value of the right operand and assigns the result to the variable.
... syntax operator: x *= y meaning: x = x * y examples using multiplication assignment // assuming the following variable // bar = 5 bar *= 2 // 10 bar *= 'foo' // nan specifications specification ecmascript (ecma-262)the definition of 'assignment operators' in that specification.

TypeScript support in Svelte - Learn web development
previous overview: client-side javascript frameworks next in the last article we learned about svelte stores and even implemented our own custom store to persist the app's information to web storage.
... we will now learn how to use typescript in svelte applications.
... first we'll learn what typescript is and what benefits it can bring us.
...And 120 more matches

What is JavaScript? - Learn web development
overview: first steps next welcome to the mdn beginner's javascript course!
... in this article we will look at javascript from a high level, answering questions such as "what is it?" and "what can you do with it?", and making sure you are comfortable with javascript's purpose.
... objective: to gain familiarity with what javascript is, what it can do, and how it fits into a web site.
...And 84 more matches

Eclipse CDT
introduction eclipse cdt (c/c++ development tools) is an open-source ide for c and c++ development with advanced code assistance (inheritance/call graph explorer, jump to definition, refactoring, autocomplete, syntax highlighting, and so on).
... system requirements eclipse will use a lot of memory to fully index the mozilla source tree to provide code assistance features (easily 4 gb of ram, although this will drop to just over 1 gb if you restart after indexing is complete).
... installing eclipse regarding llvm4eclipsecdt, do not install or select this toolchain for mozilla development.
...And 76 more matches

Handling common JavaScript problems - Learn web development
previous overview: cross browser testing next now we'll look at common cross-browser javascript problems and how to fix them.
... this includes information on using browser dev tools to track down and fix problems, using polyfills and libraries to work around problems, getting modern javascript features working in older browsers, and more.
... prerequisites: familiarity with the core html, css, and javascript languages; an idea of the high-level principles of cross browser testing.
...And 74 more matches

Content Scripts - Archive of obsolete content
instead, sdk add-ons need to factor the code that gets access to web content into separate scripts that are called content scripts.
... this page describes how to develop and implement content scripts.
... content scripts can be one of the more confusing aspects of working with the sdk, but you're very likely to have to use them.
...And 73 more matches

nsIZipWriter
modules/libjar/zipwriter/public/nsizipwriter.idlscriptable this interface provides an easy way for scripts to archive data in the zip file format.
... note: although it is not necessary to add directory entries in order to add file entries within them, some zip utilities may have problems with that, so it may be best to add the directory entries explicitly first.
... implemented by: @mozilla.org/zipwriter;1.
...And 67 more matches

Bytecode Descriptions
bigint operands: (uint32_t bigintindex) stack: ⇒ bigint push the bigint constant script->getbigint(bigintindex).
... string operands: (uint32_t atomindex) stack: ⇒ string push the string constant script->getatom(atomindex).
...format: jof_ic mul, div, mod stack: lval, rval ⇒ (lval op rval) the multiplicative operators (*, /, %).
...And 61 more matches

Debugger.Script - Firefox Developer Tools
debugger.script a debugger.script instance may refer to a sequence of bytecode in the debuggee or to a block of webassembly code.
... for the former, it is the debugger api’s presentation of a jsapi jsscript object.
... debugger.script for jsscripts for debugger.script instances referring to a jsscript, they are distinguished by their format property being "js".
...And 58 more matches

Appendix D: Loading Scripts - Archive of obsolete content
most add-ons and xul runner applications provide their primary functionality by loading and executing javascript code.
... because there are such a diverse array of add-ons, and because the needs of developers have grown organically over time, the gecko runtime provides a number of means to dynamically load and execute javascript files.
...below is an overview of the more common means of loading scripts, along with some of their primary advantages, disadvantages, quirks, and use cases.
...And 56 more matches

Back to the Server: Server-Side JavaScript On The Rise - Archive of obsolete content
by davey waterson, javascript architect, aptana there's no debate that javascript is the most widely used language client-side on the web.
... regardless of how the back-ends of your web applications are implemented, client side you're using javascript for everything from same form validations to full ajax applications.
... now imagine being able to develop web apps using javascript server-side too.
...And 56 more matches

Using the clipboard
this section provides information about cutting, copying, and pasting to and from the clipboard.
... the clipboard mozilla provides a number of interfaces for accessing the clipboard.
... the component @mozilla.org/widget/clipboardhelper;1 can be used to copy text to the clipboard.
...And 54 more matches

Introduction - JavaScript
« previousnext » this chapter introduces javascript and discusses some of its fundamental concepts.
...if you are new to programming, try one of the tutorials linked on the main page about javascript.
... where to find javascript information the javascript documentation on mdn includes the following: learn web development provides information for beginners and introduces basic concepts of programming and the internet.
...And 53 more matches

Eclipse CDT Manual Setup
mach setup most people should be reading the eclipse cdt page instead of this one, now that mach ide eclipse is a thing.
... this page contains the content that used to live on the eclipse cdt page that most people will likely just consider noise.
...for now it's stored here until that integration happens in order that the eclipse cdt page isn't hugely cluttered with mostly redundant information, make setting up eclipse look much more complicated than it is nowadays.
...And 51 more matches

Details of the object model - JavaScript
« previousnext » javascript is an object-based language based on prototypes, rather than being class-based.
... because of this different basis, it can be less apparent how javascript allows you to create hierarchies of objects and to have inheritance of properties and their values.
... this chapter assumes that you are already somewhat familiar with javascript and that you have used javascript functions to create simple objects.
...And 50 more matches

IPDL Tutorial
ipdl, short for "inter-process-communication protocol definition language", is a mozilla-specific language allowing c++ code to pass messages between processes or threads in an organized and secure way.
... all messages for multi-process plugins and tabs in firefox are declared in the ipdl language.
... to experiment with adding a new ipdl protocol, see creating a new protocol.
...And 47 more matches

nsIZipReader
modules/libjar/nsizipreader.idlscriptable this interface provides methods for reading compressed (zip) files.
... inherits from: nsisupports last changed in gecko 10.0 (firefox 10.0 / thunderbird 10.0 / seamonkey 2.7) implemented by: @mozilla.org/libjar/zip-reader;1.
... to create an instance, use: var zipreader = components.classes["@mozilla.org/libjar/zip-reader;1"] .createinstance(components.interfaces.nsizipreader); about character sets and code pages note: nsizipreader has a code page problem; that is, in the zip specification, filenames are supposed to use 7-bit ascii; however, most modern filesystems use 8 bit code pages, such as utf-8.
...And 44 more matches

JavaScript basics - Learn web development
previous overview: getting started with the web next javascript is a programming language that adds interactivity to your website.
...this article helps you get started with javascript and furthers your understanding of what is possible.
... what is javascript?
...And 43 more matches

Grammar and types - JavaScript
« previousnext » this chapter discusses javascript's basic grammar, variable declarations, data types and literals.
... basics javascript borrows most of its syntax from java, c, and c++, but it has also been influenced by awk, perl, and python.
... javascript is case-sensitive and uses the unicode character set.
...And 39 more matches

Strict mode - JavaScript
javascript's strict mode, introduced in ecmascript 5, is a way to opt in to a restricted variant of javascript, thereby implicitly opting-out of "sloppy mode".
...strict mode code and non-strict mode code can coexist, so scripts can opt into strict mode incrementally.
... strict mode makes several changes to normal javascript semantics: eliminates some javascript silent errors by changing them to throw errors.
...And 39 more matches

Scripting Java
this article shows how to use rhino to reach beyond javascript into java.
... scripting java has many uses.
... it allows us to write powerful scripts quickly by making use of the many java libraries available.
...And 38 more matches

JavaScript
javascript (js) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions.
... while it is most well-known as the scripting language for web pages, many non-browser environments also use it, such as node.js, apache couchdb and adobe acrobat.
... javascript is a prototype-based, multi-paradigm, single-threaded, dynamic language, supporting object-oriented, imperative, and declarative (e.g.
...And 37 more matches

Interacting with page scripts - Archive of obsolete content
by default, content scripts loaded by add-ons and scripts loaded by web pages are insulated from each other: content scripts can't interact directly with page scripts or access javascript objects they create page scripts can't interact directly with content scripts or access objects they create.
...you don't want arbitrary web pages to be able to access objects in content scripts, and you don't want objects created by content scripts to clash with objects created by page scripts.
...this guide describes: how to share objects between content scripts and page scripts how to send messages between content scripts and page scripts sharing objects with page scripts there are two possible cases here: a content script might want to access an object defined by a page script a content script might want to expose an object to a page script access objects defined by page scripts to access page script objects from content scripts, you can use the global unsafewindow object.
...And 34 more matches

Hacking Tips
this page list a few tips to help you investigate issues related to spidermonkey.
... all tips listed here are dealing with the javascript shell obtained at the end of the build documentation of spidermonkey.
...many of these tips only apply to debug builds of the js shell; they will not function in a release build.
...And 33 more matches

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.
...when the mouse is moved again, the tooltip disappears.
... note that tooltips can only be activated using the mouse, so they should never contain important information that isn't available elsewhere.
...And 32 more matches

Introduction to the JavaScript shell
the javascript shell (js) is a command-line program included in the spidermonkey source distribution.
... it is the javascript equivalent of python's interactive prompt, the lisp read-eval-print loop, or ruby's irb.
... this article explains how to use the shell to experiment with javascript code and run javascript programs.
...And 32 more matches

nsIPushService
dom/interfaces/push/nsipushservice.idlscriptable a service for components to subscribe and receive push messages from remote servers.
...nsipushservice supports the push api implementation in firefox, and can be used directly from privileged code to create system subscriptions.
... implemented by @mozilla.org/push/service;1 as a service: const pushservice = components.classes["@mozilla.org/push/service;1"] .getservice(components.interfaces.nsipushservice); method overview void subscribe(in domstring scope, in nsiprincipal principal, in nsipushsubscriptioncallback callback); void getsubscription(in domstring scope, in nsiprincipal principal, in nsipushsubscriptioncallback callback); void unsubscribe(in domstring scope, in nsiprincipal principal, in nsiunsubscriberesultcallback callback); methods subscribe() creates a push subscription.
...And 32 more matches

Lexical grammar - JavaScript
this page describes javascript's lexical grammar.
... the source text of ecmascript scripts gets scanned from left to right and is converted into a sequence of input elements which are tokens, control characters, line terminators, comments or white space.
... ecmascript also defines certain keywords and literals and has rules for automatic insertion of semicolons to end statements.
...And 32 more matches

Script security
this page provides an overview of the script security architecture in gecko.
... like any web browser, gecko can load javascript from untrusted and potentially hostile web pages and run it on the user's computer.
... gecko has an additional problem, though: while its core is written in c++, the front-end code is written in javascript.
...And 31 more matches

Avoiding leaks in JavaScript XPCOM components
using xpcom in javascript (also known as xpconnect) is an environment where memory management issues are not obvious.
...despite this, it's easy to write javascript code that leaks.
... programmers writing and reviewing javascript code in mozilla should understand how code using xpcom in javascript can leak so that they can avoid leaks.
...And 31 more matches

Multiple-column layout - Learn web development
previous overview: css layout next the multiple-column layout specification gives you a method of laying content out in columns, as you might see in a newspaper.
... prerequisites: html basics (study introduction to html), and an idea of how css works (study introduction to css.) objective: to learn how to create multiple-column layout on webpages, such as you might find in a newspaper.
... a basic example we will now explore how to use multiple-column layout, often referred to as multicol.
...And 30 more matches

Manipulating documents - Learn web development
previous overview: client-side web apis next when writing web pages and apps, one of the most common things you'll want to do is manipulate the document structure in some way.
... prerequisites: basic computer literacy, a basic understanding of html, css, and javascript — including javascript objects.
... objective: to gain familiarity with the core dom apis, and the other apis commonly associated with dom and document manipulation the important parts of a web browser web browsers are very complicated pieces of software with a lot of moving parts, many of which can't be controlled or manipulated by a web developer using javascript.
...And 30 more matches

Frame script loading and lifetime
loading frame scripts to load a frame script use the loadframescript() function.
... this line of code loads a frame script into the currently selected tab.
... the script just writes "foo" to the command line: // chrome script var mm = gbrowser.selectedbrowser.messagemanager; mm.loadframescript('data:,dump("foo\\n")', true); loadframescript() takes two mandatory parameters: a url that points to the frame script you want to load a boolean flag, allowdelayedload note: if the message manager is a global frame message manager or a window message manager, loadframescript() may load the script multiple times, once in each applicable frame.
...And 29 more matches

Inheritance and the prototype chain - JavaScript
javascript is a bit confusing for developers experienced in class-based languages (like java or c++), as it is dynamic and does not provide a class implementation per se (the class keyword is introduced in es2015, but is syntactical sugar, javascript remains prototype-based).
... when it comes to inheritance, javascript only has one construct: objects.
... nearly all objects in javascript are instances of object which sits on the top of a prototype chain.
...And 29 more matches

Basic math in JavaScript — numbers and operators - Learn web development
previous overview: first steps next at this point in the course we discuss math in javascript — how we can use operators and other features to successfully manipulate numbers to do our bidding.
... prerequisites: basic computer literacy, a basic understanding of html and css, an understanding of what javascript is.
... objective: to gain familiarity with the basics of math in javascript.
...And 28 more matches

FIPS Mode - an explanation
nss has a "fips mode" that can be enabled when nss is compiled in a specific way.
... (note: mozilla does not distribute a "fips mode"-ready nss with firefox.) this page attempts to provide an informal explanation of what it is, who would use it, and why.
... what's a fips?
...And 28 more matches

nsIPromptService
embedding/components/windowwatcher/public/nsipromptservice.idlscriptable this interface can be used to display simple dialogs.
...for javascript, they are extra work, as you can't use an out parameter directly.
...for more information on out parameters and javascript refer to working with out parameters.
...And 28 more matches

Communicating With Other Scripts - Archive of obsolete content
this page is now obsolete, and its content has been incorporated into the main page on content scripts.
... this section of the guide explains how content scripts can communicate with: your main.js file, or any other modules in your add-on other content scripts loaded by your add-on page scripts (that is, scripts embedded in the web page or included using <script> tags) main.js your content scripts can communicate with your add-on's "main.js" (or any other modules you're written for your add-on) by sending it messages, using either the port.emit() api or the postmessage() api.
... content scripts content scripts loaded into the same document at the same time using the same method can interact with each other directly as well as with the web content itself.
...And 27 more matches

Using the WebAssembly JavaScript API - WebAssembly
if you have already compiled a module from another language using tools like emscripten, or loaded and run the code yourself, the next step is to learn more about using the other features of the webassembly javascript api.
... some simple examples let’s run through some examples that explain how to use the webassembly javascript api, and how to use it to load a wasm module in a web page.
...we need to reflect this two-level namespace in javascript when writing the object to be imported into the wasm module.
...And 27 more matches

RTCPeerConnection.setRemoteDescription() - Web APIs
the rtcpeerconnection method setremotedescription() sets the specified session description as the remote peer's current offer or answer.
... the description specifies the properties of the remote end of the connection, including the media format.
... the method takes a single parameter—the session description—and it returns a promise which is fulfilled once the description has been changed, asynchronously.
...And 26 more matches

CSS and JavaScript accessibility best practices - Learn web development
previous overview: accessibility next css and javascript, when used properly, also have the potential to allow for accessible web experiences ...
...this article outlines some css and javascript best practices that should be considered to ensure even complex content is as accessible as possible.
... prerequisites: basic computer literacy, a basic understanding of html, css, and javascript, and understanding of what accessibility is.
...And 25 more matches

nsIClipboard
widget/nsiclipboard.idlscriptable this interface supports basic clipboard operations such as: setting, retrieving, emptying, matching and supporting clipboard data.
... inherits from: nsisupports last changed in gecko 30.0 (firefox 30.0 / thunderbird 30.0 / seamonkey 2.27) method overview void emptyclipboard(in long awhichclipboard); void forcedatatoclipboard(in long awhichclipboard); obsolete since gecko 1.8 void getdata(in nsitransferable atransferable, in long awhichclipboard); boolean hasdatamatchingflavors([array, size_is(alength)] in string aflavorlist, in unsigned long alength, in long awhichclipboard); void setdata(in nsitransferable atransferable, in nsiclipboardowner anowner, in long awhichclipboard); boolean supportsselectionclipboard(); boolean supportsfindclipboard(); constants most clipboard operations in firefox use kglobalclipboard, which is the one also used by th...
... the kselectionclipboard is peculiar to the x windows system, where it refers to the primary selection, which is the one that simple mouse selection and middle-click paste operations are using.
...And 25 more matches

Functions - JavaScript
« previousnext » functions are one of the fundamental building blocks in javascript.
... a function in javascript is similar to a procedure—a set of statements that performs a task or calculates a value, but for a procedure to qualify as a function, it should take some input and return an output where there is some obvious relationship between the input and the output.
... see also the exhaustive reference chapter about javascript functions to get to know the details.
...And 25 more matches

JavaScript Daemons Management - Archive of obsolete content
in the javascript programming language, daemons are all processes created by javascript timers or by a worker instantiation.
... here are some code snippets that simplify and abstract the management of daemons.
... advantages of this approch: abstraction passage of this object to javascript timers (both setinterval and settimeout) optimisation (avoiding closures) modularity the code the code of this framework is split into three files: daemon.js (the core) daemon-safe.js (an extension of the core which adds a replacement of setinterval with a recursive invocation of settimeout) daemon-methods.js (a wide and highly scalable collection of methods) the only independent mod...
...And 24 more matches

A first splash into JavaScript - Learn web development
previous overview: first steps next now you've learned something about the theory of javascript, and what you can do with it, we are going to give you a crash course in the basic features of javascript via a completely practical tutorial.
... prerequisites: basic computer literacy, a basic understanding of html and css, an understanding of what javascript is.
... objective: to have a first bit of experience at writing some javascript, and gain at least a basic understanding of what writing a javascript program involves.
...And 24 more matches

Limitations of chrome scripts
this page describes patterns that used to work in the chrome process that will no longer work in multiprocess firefox.
... these are the sorts of things that will break an old add-on in multiprocess firefox.
... the fix is generally some variant of "do that in a frame script loaded into the content process".
...And 24 more matches

nsIPluginHost
dom/plugins/base/nsipluginhost.idlscriptable please add a summary to this article.
... nsiplugin getplugin(in string amimetype); native code only!
... void getplugincount(out unsigned long aplugincount); obsolete since gecko 1.8 nsiplugin getpluginfactory(in string amimetype); native code only!
...And 24 more matches

HTMLScriptElement - Web APIs
html <script> elements expose the htmlscriptelement interface, which provides special properties and methods for manipulating the behavior and execution of <script> elements (beyond the inherited htmlelement interface).
... javascript files should be served with the application/javascript mime type, but browsers are lenient and block them only if the script is served with an image type (image/*), video type (video/*), audio type (audio/*), or text/csv.
... if the script is blocked, its element receives an error event; otherwise, it receives a load event.
...And 24 more matches

CSP: script-src - HTTP
the http content-security-policy (csp) script-src directive specifies valid sources for javascript.
... this includes not only urls loaded directly into <script> elements, but also things like inline script event handlers (onclick) and xslt stylesheets which can trigger script execution.
... syntax one or more sources can be allowed for the script-src policy: content-security-policy: script-src <source>; content-security-policy: script-src <source> <source>; sources <source> can be one of the following: <host-source> internet hosts by name or ip address, as well as an optional url scheme and/or port number.
...And 24 more matches

Tips for authoring fast-loading HTML pages - Learn web development
these tips are based on common knowledge and experimentation.
... tips reduce page weight page weight is by far the most important factor in page-load performance.
... reducing page weight through the elimination of unnecessary whitespace and comments, commonly known as minimization, and by moving inline script and css into external files, can improve download performance with minimal need for other changes in the page structure.
...And 23 more matches

RTCPeerConnection.setLocalDescription() - Web APIs
the rtcpeerconnection method setlocaldescription() changes the local description associated with the connection.
... this description specifies the properties of the local end of the connection, including the media format.
... the method takes a single parameter—the session description—and it returns a promise which is fulfilled once the description has been changed, asynchronously.
...And 23 more matches

clip-path - CSS: Cascading Style Sheets
the clip-path css property creates a clipping region that sets what part of an element should be shown.
... syntax /* keyword values */ clip-path: none; /* <clip-source> values */ clip-path: url(resources.svg#c1); /* <geometry-box> values */ clip-path: margin-box; clip-path: border-box; clip-path: padding-box; clip-path: content-box; clip-path: fill-box; clip-path: stroke-box; clip-path: view-box; /* <basic-shape> values */ clip-path: inset(100px 50px); clip-path: circle(50px at 0 100px); clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%); clip-path: path('m0.5,1 c0.5,1,0,0.7,0,0.3 a0.25,0.
...25,1,1,1,0.5,0.3 a0.25,0.25,1,1,1,1,0.3 c1,0.7,0.5,1,0.5,1 z'); /* box and shape values combined */ clip-path: padding-box circle(50px at 0 100px); /* global values */ clip-path: inherit; clip-path: initial; clip-path: unset; the clip-path property is specified as one or a combination of the values listed below.
...And 23 more matches

Expressions and operators - JavaScript
« previousnext » this chapter describes javascript's expressions and operators, including assignment, comparison, arithmetic, bitwise, logical, string, ternary and more.
... operators javascript has the following types of operators.
... assignment operators comparison operators arithmetic operators bitwise operators logical operators string operators conditional (ternary) operator comma operator unary operators relational operators javascript has both binary and unary operators, and one special ternary operator, the conditional operator.
...And 23 more matches

Obsolete: XPCOM-based scripting for NPAPI plugins - Archive of obsolete content
it does not cover netscape 6 and 6.01 introduction plugins that used to take advantage of being scriptable via liveconnect in 4.x netscape browsers lost this possibility in the new world.
...the new mozilla xpcom architecture allows xpcom components be scriptable via a different mechanism called xpconnect.
... we leverage some of these ideas to help you make your netscape communicator 4.x plugins exposed to javascript in mozilla based browsers.
...And 22 more matches

Solve common problems in your JavaScript code - Learn web development
the following links point to solutions to common problems you may encounter when writing javascript.
... running code after a return statement remember also that when you return from a function, the javascript interpreter exits the function — no code after the return statement will run.
... object notation versus normal assignment when you assign something normally in javascript, you use a single equals sign, e.g.: const mynumber = 0; with objects, however, you need to take care to use the correct syntax.
...And 22 more matches

nsIProtocolProxyService
netwerk/base/public/nsiprotocolproxyservice.idlscriptable this interface provides methods to access information about various network proxies.
...to access the service use: var pps = components.classes["@mozilla.org/network/protocol-proxy-service;1"] .getservice(components.interfaces.nsiprotocolproxyservice); method overview deprecated since gecko 18 nsiproxyinfo resolve(in nsiuri auri, in unsigned long aflags); nsicancelable asyncresolve(in nsiuri auri, in unsigned long aflags,in nsiprotocolproxycallback acallback); nsiproxyinfo newproxyinfo(in acstring atype, in autf8string ahost,in long aport, in unsigned long aflags, in unsigned long afailovertimeout, in nsiproxyinfo afailoverproxy); nsiproxyinfo getfailoverforproxy(in nsiproxyinfo aproxyinfo, in nsiuri aur...
...i, in nsresult areason); void registerfilter(in nsiprotocolproxyfilter afilter, in unsigned long aposition); void unregisterfilter(in nsiprotocolproxyfilter afilter); constants constant value description resolve_non_blocking 1<<0 this flag may be passed to the resolve method to request that it fail instead of block the calling thread.
...And 22 more matches

Add to iPhoto
this extension for mac os x serves as a demonstration of how to use js-ctypes to call mac os x carbon, core foundation, and other system frameworks from an extension written entirely in javascript.
... once installed, when you right-click on an image, you'll see among the options in the contextual menu an option to "add image to iphoto".
... choose it, and iphoto will start up (if it's not already running) and import the image.
...And 22 more matches

Use JavaScript within a webpage - Learn web development
take your webpages to the next level by harnessing javascript.
... learn in this article how to trigger javascript right from your html documents.
... objective: learn how to trigger javascript in your html file, and learn the most important best practices for keeping javascript accessible.
...And 21 more matches

JSPrincipals
define security information for an object or script.
... properties name type description refcount mozilla::atomic<int32_t> reference count.
... use js_holdprincipals and js_dropprincipals.
...And 21 more matches

nsIPermissionManager
the nsipermissionmanager interface is used to persistently store permissions for different object types (cookies, images, and so on) on a site-by-site basis.
... netwerk/base/nsipermissionmanager.idlscriptable please add a summary to this article.
... last changed in gecko 16 (firefox 16 / thunderbird 16 / seamonkey 2.13) inherits from: nsisupports method overview void add(in nsiuri uri, in string type, in pruint32 permission, [optional] in pruint32 expiretype, [optional] in print64 expiretime); void addfromprincipal(in nsiprincipal principal, in string type, in pruint32 permission, [optional] in pruint32 expiretype, [optional] in print64 expiretime); void remove(in autf8string host, in string type); void removefromprincipal(in nsiprincipal principal, in string type); void removepermission(in nsipermission perm); void removeallsince(in int64_t since); void removeall(); pruint32 testexactpermission(in nsiuri uri, in string type); ...
...And 21 more matches

nsIScriptError
js/xpconnect/idl/nsiscripterror.idlscriptable represents javascript errors and warnings for use by the console service.
... 66 introduced gecko 1.0 inherits from: nsiconsolemessage last changed in gecko 1.9 (firefox 3) implemented by: @mozilla.org/scripterror;1.
... to create an instance, use: var scripterror = components.classes["@mozilla.org/scripterror;1"] .createinstance(components.interfaces.nsiscripterror); note: the nsiscripterror2 interface was merged into this interface in gecko 12.0.
...And 21 more matches

In depth: Microtasks and the JavaScript runtime environment - Web APIs
when debugging or, possibly, when trying to decide upon the best approach to solving a problem around timing and scheduling of tasks and microtasks, there are things about how the javascript runtime operates under the hood that may be useful to understand.
... that's what this section covers introduction javascript is an inherently single-threaded language.
... it was designed in an era in which this was a positive choice; there were few multi-processor computers available to the general public, and the expected amount of code that would be handled by javascript was relatively low at that time.
...And 21 more matches

HTML attribute: multiple - HTML: Hypertext Markup Language
the boolean multiple attribute, if set, means the form control accepts one or more values.
... valid for the email and file input types and the <select>, the manner by which the user opts for multiple values depends on the form control.
... depending on the type, the form control may have a different appearance if the multiple attribute is set.
...And 21 more matches

JavaScript Object Management - Archive of obsolete content
« previousnext » chrome javascript in this section we'll look into how to handle javascript data effectively, beginning with chrome code, in ways which will prevent pollution of shared namespaces and conflicts with other add-ons resulting from such global namespace pollution.
... the first step to good javascript object management is having a namespace, or a javascript object that contains our code and data, that you know will not conflict with firefox code or other extensions.
...it's one of the funky properties of javascript: all objects are nothing more than name / value mappings.
...And 20 more matches

JavaScript performance - Learn web development
previous overview: performance next while images and video account for over 70% of the bytes downloaded for the average website, byte per byte, javascript has a greater negative impact on performance.
... this article looks to introduce performance issues caused by scripts and introduces tips and tricks for optimizing javascript for web performance.
... objective: to learn about the effects of javascript on performance optimization, and how a javascript file size is not the only impact on web performance.
...And 20 more matches

mozIJSSubScriptLoader
js/xpconnect/idl/mozijssubscriptloader.idlscriptable this interface can be used from privileged javascript to load and run javascript code from the given url at runtime.
... 66 introduced gecko 1.0 inherits from: nsisupports last changed in gecko 28 (firefox 28 / thunderbird 28 / seamonkey 2.25 / firefox os 1.3) implemented by: @mozilla.org/moz/jssubscript-loader;1.
... to get this service, use: var mozijssubscriptloader = components.classes["@mozilla.org/moz/jssubscript-loader;1"] .getservice(components.interfaces.mozijssubscriptloader); note: see components.utils.import for another way to import javascript code.
...And 20 more matches

New in JavaScript - Archive of obsolete content
this chapter contains information about javascript's version history and implementation status for mozilla/spidermonkey-based javascript applications, such as firefox.
... ecmascript versions language resources learn more about the ecmascript standards on which the javascript language is based on.
... ecmascript 5 support implementation status for the current standard ecma-262 edition 5.1 in mozilla-based engines and products.
...And 19 more matches

Learn XPI Installer Scripting by Example - Archive of obsolete content
this article uses the installer script from browser.xpi install package as the basis for discussing xpi installations in general.
... this installer script is relatively short, but it exercises most of the important features of the xpinstall api, and it can easily be used as a template for other more general software installations.
...a xpi is a pkzip-compressed archive (like zip and jar files) with a special script at the highest level that manages the installation.
...And 18 more matches

Properly Using CSS and JavaScript in XHTML Documents - Archive of obsolete content
problems with inline style and script inline style and script tags can cause several different problems in xhtml when it is treated as xml rather than html.
... javascript contains characters which can not exist in xhtml javascript typically contains characters which can not exist in xhtml outside of cdata sections.
... <script type="text/javascript"> var i = 0; while (++i < 10) { // ...
...And 18 more matches

Creating JavaScript jstest reftests
this directory contains tests of spidermonkey conformance to ecmascript as well as spidermonkey non-standard extenstions to ecmascript.
... non262 tests the directory js/src/tests/non262/ should contain all tests of the following type: regressions of spidermonkey non-standard spidermonkey extensions to the javascript language test of "implementation-defined" details of the ecmascript standard for example, the exact definition of pi or some details of array sorting.
... performance tests or stress tests tests of spidermonkey's comformance to the ecmascript standard a brief history: in 2017, spidermonkey started comsuming test262, a comprehensive tests suite for ecmascript implementations.
...And 18 more matches

Working with objects - JavaScript
« previousnext » javascript is designed on a simple object-based paradigm.
... objects overview objects in javascript, just as in many other programming languages, can be compared to objects in real life.
... the concept of objects in javascript can be understood with real life, tangible objects.
...And 18 more matches

Object.defineProperty() - JavaScript
syntax object.defineproperty(obj, prop, descriptor) parameters obj the object on which to define the property.
... descriptor the descriptor for the property being defined or modified.
... description this method allows a precise addition to or modification of a property on an object.
...And 18 more matches

eval() - JavaScript
warning: executing javascript from a string is an enormous security risk.
... the eval() function evaluates javascript code represented as a string.
... syntax eval(string) parameters string a string representing a javascript expression, statement, or sequence of statements.
...And 18 more matches

Writing JavaScript for XHTML - Archive of obsolete content
(rather than displaying content, it would present the user with a file download dialog.) but it is also founded in the experience that javascript, authored carefully for html, can break when placed with an xml environment.
...it will encourage web authors to use more xml features and make their javascript interoperable with real xhtml applications.
... problem: nothing works after switching the mime type suddenly no inline script works anymore.
...And 17 more matches

Process scripts
process scripts are new in firefox 38.
... when you need to run code in the content process in order to access web content, then you should use frame scripts.
... however, a problem with frame scripts is that they can be loaded multiple times in the content process, in multiple scopes that are insulated from each other.
...And 17 more matches

nsIFrameScriptLoader
idl file: mozilla-central/source/dom/base/nsimessagemanager.idl inherits from: nsisupports this interface is used to load frame scripts.
... methods void loadframescript(in astring aurl, in boolean aallowdelayedload, [optional] in boolean aruninglobalscope) void removedelayedframescript(in astring aurl); jsval getdelayedframescripts(); loadframescript() load a script in the remote frame.
... frame scripts are loaded as soon as loadframescript() is called.
...And 17 more matches

Clipboard - Web APIs
the clipboard interface implements the clipboard api, providing—if the user grants permission—both read and write access to the contents of the system clipboard.
... the clipboard api can be used to implement cut, copy, and paste features within a web application.
... the system clipboard is exposed through the global navigator.clipboard property.
...And 17 more matches

Using microtasks in JavaScript with queueMicrotask() - Web APIs
a microtask is a short function which is executed after the function or program which created it exits and only if the javascript execution stack is empty, but before returning control to the event loop being used by the user agent to drive the script's execution environment.
...this lets the given function run without the risk of interfering with another script's execution, yet also ensures that the microtask runs before the user agent has the opportunity to react to actions taken by the microtask.
... javascript promises and the mutation observer api both use the microtask queue to run their callbacks, but there are other times when the ability to defer work until the current event loop pass is wrapping up.
...And 17 more matches

Control flow and error handling - JavaScript
« previousnext » javascript supports a compact set of statements, specifically control flow statements, that you can use to incorporate a great deal of interactivity in your application.
... the javascript reference contains exhaustive details about the statements in this chapter.
... the semicolon (;) character is used to separate statements in javascript code.
...And 17 more matches

Regular expressions - JavaScript
in javascript, regular expressions are also objects.
...this chapter describes javascript regular expressions.
... creating a regular expression you construct a regular expression in one of two ways: using a regular expression literal, which consists of a pattern enclosed between slashes, as follows: let re = /ab+c/; regular expression literals provide compilation of the regular expression when the script is loaded.
...And 17 more matches

Inheritance in JavaScript - Learn web development
in addition, we present some advice on when and where you might use oojs, and look at how classes are dealt with in modern ecmascript syntax.
... prerequisites: basic computer literacy, a basic understanding of html and css, familiarity with javascript basics (see first steps and building blocks) and oojs basics (see introduction to objects).
... objective: to understand how it is possible to implement inheritance in javascript.
...And 16 more matches

TLS Cipher Suite Discovery
instead, tls allows only certain well-defined combinations of those choices, known as cipher suites, defined in the ietf rfc standards.
... each cipher suite is represented by a 16-bit number.
... the number of well-defined cipher suites grows with time, and no tls implementation offers all known cipher suites at all times.
...And 16 more matches

The JavaScript Runtime
when scripts are compiled in interpretive mode, an internal representation of the compiled form is created and stored rather than generating a java class.
... compilation to java bytecodes for improved performance, rhino may compile javascript scripts to java bytecodes.
...each javascript script or function is compiled to a separate class.
...And 16 more matches

Places utilities for JavaScript
description_anno - this annotation stores description information about a bookmark.
...ng atype, nsiuri aoverrideuri); array unwrapnodes(string blob, string atype); nsitransaction maketransaction(string data, string type, nsinavhistoryresultnode container, int index, boolean copy); nsinavhistoryresult getfoldercontents(int afolderid, boolean aexcludeitems, boolean aexpandqueries); boolean showaddbookmarkui(nsiuri auri, string atitle, string adescription, int adefaultinsertionpoint, boolean ashowpicker, boolean aloadinsidebar, string akeyword, string apostdata); boolean showminimaladdbookmarkui(nsiuri auri, string atitle, string adescription, int adefaultinsertionpoint, boolean ashowpicker, boolean aloadinsidebar, string akeyword, string apostdata); boolean showaddlivemarkui(nsiuri afeeduri, nsiuri asiteuri, string atitle, s...
...tring adescription, int adefaultinsertionpoint, boolean ashowpicker); boolean showminimaladdlivemarkui(nsiuri afeeduri, nsiuri asiteuri, string atitle, string adescription, int adefaultinsertionpoint, boolean ashowpicker); boolean showminimaladdmultibookmarkui(array nsiuri aurilist); boolean showbookmarkproperties(int aid); boolean showfolderproperties(int aid); boolean showaddfolderui(string atitle, int adefaultinsertionpoint, boolean ashowpicker); array object getannotationsforuri(nsiuri auri); array object getannotationsforitem(int aitemid); void setannotationsforuri(nsiuri auri, object aannos); void setannotationsforuri(int aitemid, object aannos); getviewfornode(nsidomnode anode); void mar...
...And 16 more matches

CSP: script-src-attr - HTTP
the http content-security-policy (csp) script-src-attr directive specifies valid sources for javascript inline event handlers.
... this includes only inline script event handlers like onclick, but not urls loaded directly into <script> elements.
...if this directive is absent, the user agent will look for the script-src directive, and if both of them are absent, fallback to default-src directive.
...And 16 more matches

Multiple item extension packaging - Archive of obsolete content
from the release of firefox 53, multiple item extension packages are no longer supported and will not load.
... a multiple item package provides the ability to package multiple installable bundles which can then be downloaded and installed by a user, or provided pre-packaged with an application or by an external program.
... every multiple item package must provide an install.rdf file (not old-style install.js!) and has the same requirements as an extension except as noted below.
...And 15 more matches

tooltip - Archive of obsolete content
« xul reference home [ examples | attributes | properties | methods | related ] this element is used for the tooltip popups.
... for text-only tooltips, this element doesn't need to be used; instead you may just add a tooltiptext attribute to an element.
... attributes crop, default, label, noautohide, onpopuphidden, onpopuphiding, onpopupshowing, onpopupshown, page, position properties accessibletype, label, popupboxobject, position, state methods hidepopup, moveto, openpopup, openpopupatscreen, showpopup, sizeto examples <tooltip id="moretip" orient="vertical" style="background-color: #33dd00;"> <label value="click here to see more information"/> <label value="really!" style="color: red;"/> </tooltip> <vbox> <button label="simple" tooltiptext="a simple popup"/> <button label="more" tooltip="moretip"/> </vbox> attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the tex...
...And 15 more matches

Object-oriented JavaScript for beginners - Learn web development
previous overview: objects next with the basics out of the way, we'll now focus on object-oriented javascript (oojs) — this article presents a basic view of object-oriented programming (oop) theory, then explores how javascript emulates object classes via constructor functions, and how to create object instances.
... prerequisites: basic computer literacy, a basic understanding of html and css, familiarity with javascript basics (see first steps and building blocks) and oojs basics (see introduction to objects).
... objective: to understand the basic theory behind object-oriented programming, how this relates to javascript ("everything is an object"), and how to create constructors and object instances.
...And 15 more matches

Compositing and clipping - Web APIs
in addition, the clip property allows us to hide unwanted parts of shapes.
... clipping paths a clipping path is like a normal canvas shape but it acts as a mask to hide unwanted parts of shapes.
...the red star shape is our clipping path.
...And 15 more matches

RTCSessionDescription - Web APIs
the rtcsessiondescription interface describes one end of a connection—or potential connection—and how it's configured.
... each rtcsessiondescription consists of a description type indicating which part of the offer/answer negotiation process it describes and of the sdp descriptor of the session.
... the process of negotiating a connection between two peers involves exchanging rtcsessiondescription objects back and forth, with each description suggesting one combination of connection configuration options that the sender of the description supports.
...And 15 more matches

CSP: script-src-elem - HTTP
the http content-security-policy (csp) script-src-elem directive specifies valid sources for javascript <script> elements, but not inline script event handlers like onclick.
...if this directive is absent, the user agent will look for the script-src directive, and if both of them are absent, fallback to default-src directive.
... syntax one or more sources can be allowed for the script-src-elem policy: content-security-policy: script-src-elem <source>; content-security-policy: script-src-elem <source> <source>; script-src-elem can be used in conjunction with script-src: content-security-policy: script-src <source>; content-security-policy: script-src-elem <source>; sources <source> can be one of the following: <host-source> internet hosts by name or ip address, as well as an optional url scheme and/or port number.
...And 15 more matches

Loading Content Scripts - Archive of obsolete content
this page is now obsolete, and its content has been incorporated into the main page on content scripts.
... the constructors for content-script-using objects such as panel and page-mod define a group of options for loading content scripts: contentscript string, array contentscriptfile string, array contentscriptwhen string contentscriptoptions object we have already seen the contentscript option, which enables you to pass in the text of the script itself as a string literal.
... this version of the api avoids the need to maintain a separate file for the content script.
...And 14 more matches

Visual typescript game engine - Game development
project : visual typescript game engine version: sunshine - 2019 2d canvas game engine based on matter.js 2d physics engine for the web.
... written in typescript current version 3.1.3.
... multiplatform video chat (for all browsers) implemented.
...And 14 more matches

Handling text — strings in JavaScript - Learn web development
in this article, we'll look at all the common things that you really ought to know about strings when learning javascript, such as creating strings, escaping quotes in strings, and joining strings together.
... prerequisites: basic computer literacy, a basic understanding of html and css, an understanding of what javascript is.
... objective: to gain familiarity with the basics of strings in javascript.
...And 14 more matches

Using JavaScript code modules
javascript code modules are a concept introduced in gecko 1.9 and can be used for sharing code between different privileged scopes.
... modules can also be used to create global javascript singletons that previously required using javascript xpcom objects.
... a javascript code module is simply some javascript code located in a registered location.
...And 14 more matches

2015 MDN Fellowship Program - Archive of obsolete content
warning: the 2015 mdn fellowship program is closed.
...this page is a historical archive, originally hosted at /fellowship, and was localized.
... more information: mdn/developerfellowship wiki page.
...And 13 more matches

HTML in XUL for rich tooltips - Archive of obsolete content
specifically, we create a rich tooltip that uses html instead of plain text.
... dynamic html in xul tooltip insert the appropriate code from below into your xul overlay.
... this example is what the final xul overlay could look like, assuming a javascript overlay titled overlay.js: <?xml version="1.0" encoding="utf-8"?> <overlay id="htmltip-overlay" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml"> <script type="application/x-javascript" src="overlay.js"/> <popup id="contentareacontextmenu"> <menuitem id="htmltip1" label="foo1" onmouseover="htmltip.onmousetooltip(event)" tooltip="myhtmltip" /> <menuitem id="htmltip2" label="foo2" onmouseover="htmltip.onmousetooltip(event)" tooltip="myhtmltip" /> </popup> <popupset id="mainpopupset"> <tooltip id="myhtmltip"> <html:div id="myhtmltipdiv" type="content"/> ...
...And 13 more matches

New in JavaScript 1.3 - Archive of obsolete content
the following is a changelog for javascript from netscape navigator 4.0 to 4.5.
... the most significant change in javascript 1.3 was compliance with ecma-262 and unicode by removing inconsistencies between javascript 1.2 and the new ecma standard (which was published in june 1997).
... additional features of version 1.2, at the time not specified by ecma-262 were kept in the javascript language (see below for a list of differences).
...And 13 more matches

JavaScript object basics - Learn web development
overview: objects next in this article, we'll look at fundamental javascript object syntax, and revisit some javascript features that we've already seen earlier in the course, reiterating the fact that many of the features you've already dealt with are objects.
... prerequisites: basic computer literacy, a basic understanding of html and css, familiarity with javascript basics (see first steps and building blocks).
... objective: to understand the basic theory behind object-oriented programming, how this relates to javascript ("most things are objects"), and how to start working with javascript objects.
...And 13 more matches

Multiple Firefox profiles
reasons to have multiple profiles the casual user may want to have different profiles for work and personal use, or different family members.
... for qa, testing, and bug triaging contributors, you may want to have multiple development versions of firefox installed, each with its own profile.
... third-party tools in addition to the built-in profile manager and the external profile manager, there are a few third-party tools that make working with multiple profiles easy.
...And 13 more matches

Communicating with frame scripts
chrome code and frame scripts communicate back and forth using a messaging api which can include json-serializable objects as arguments.
... the api is mostly symmetrical, with one major exception: frame scripts can send asynchronous or synchronous messages to chrome, but chrome can only send asynchronous messages to content.
... where absolutely necessary, frame scripts can pass wrappers called cross process object wrappers (also known as cpows) to chrome, and chrome can use these wrappers to get synchronous access to content objects.
...And 13 more matches

JS_CompileScript
compiles a script for execution.
... syntax // added in spidermonkey 45 bool js_compilescript(jscontext *cx, const char *ascii, size_t length, const js::compileoptions &options, js::mutablehandlescript script); bool js_compileucscript(jscontext *cx, const char16_t *chars, size_t length, const js::compileoptions &options, js::mutablehandlescript script); // obsolete since jsapi 39 bool js_compilescript(jscontext *cx, js::handleobject obj, const char *ascii, size_t length, const js::compileoptions &options, js::mutablehandlescript script); bool js_compileucscript(jscontext *cx, js::handleobject obj, const char16_t *chars, size_t length, ...
... const js::compileoptions &options, js::mutablehandlescript script); name type description cx jscontext * pointer to a js context from which to derive runtime information.
...And 13 more matches

JS_EvaluateScript
compile and execute a script.
... syntax jsbool js_evaluatescript(jscontext *cx, jsobject *obj, const char *src, unsigned int length, const char *filename, unsigned int lineno, jsval *rval); jsbool js_evaluateucscript(jscontext *cx, jsobject *obj, const jschar *src, unsigned int length, const char *filename, unsigned int lineno, jsval *rval); name type description cx jscontext * the context in which to run the script.
... obj jsobject * the scope in which to execute the script.
...And 13 more matches

JS_ExecuteScript
execute a compiled script.
... syntax bool js_executescript(jscontext *cx, js::handlescript script, js::mutablehandlevalue rval); // added in spidermonkey 45 bool js_executescript(jscontext *cx, js::handlescript script); // added in spidermonkey 45 bool js_executescript(jscontext *cx, js::autoobjectvector &scopechain, js::handlescript script, js::mutablehandlevalue rval); // added in spidermonkey 36 bool js_executescript(jscontext *cx, js::autoobjectvector &scopechain, js::handlescript script); // added in spidermonkey 36 bool js_executescript(jscontext *cx, js::handleobject obj, js::handlescript script, js::mutablehandlevalue rval); // obsolete since jsapi 39 bool js_executescript(jscontext *cx, js::handleobject obj, js::handlescript script); //...
... obsolete since jsapi 39 bool js::cloneandexecutescript(jscontext *cx, js::handle<jsscript*> script); // added in spidermonkey 45 bool js::cloneandexecutescript(jscontext *cx, js::handle<jsobject*> obj, js::handle<jsscript*> script); // added in spidermonkey 31, obsoleted since jsapi 39 name type description cx jscontext * the context in which to execute the script.
...And 13 more matches

The JavaScript input interpreter - Firefox Developer Tools
you can interpret javascript expressions in real time using the interpreter provided by the web console.
... single-line mode for single-line entry, you can type javascript expressions in the field at the bottom of the console log, at the >> prompt.
... you can enter multiple lines of javascript by default in this mode, pressing enter after each one.
...And 13 more matches

Indexed collections - JavaScript
javascript does not have an explicit array data type.
...the array object has methods for manipulating arrays in various ways, such as joining, reversing, and sorting them.
... let arr = [] arr[3.4] = 'oranges' console.log(arr.length) // 0 console.log(arr.hasownproperty(3.4)) // true you can also populate an array when you create it: let myarray = new array('hello', myvar, 3.14159) // or let myarray = ['mango', 'apple', 'orange'] understanding length at the implementation level, javascript's arrays actually store their elements as standard object properties, using the array index as the property name.
...And 13 more matches

Numbers and dates - JavaScript
« previousnext » this chapter introduces the concepts, objects and functions used to work with and perform calculations using numbers and dates in javascript.
... numbers in javascript, numbers are implemented in double-precision 64-bit binary format ieee 754 (i.e., a number between ±2−1022 and ±2+1023, or about ±10−308 to ±10+308, with a numeric precision of 53 bits).
... a more recent addition to javascript is bigint which lets you represent integers that may be very large.
...And 13 more matches

Two Types of Scripts - Archive of obsolete content
on the web, javascript executes in the context of a web page, and has access to that page's dom content.
... this enables you to call functions like: window.alert("hello there"); in an add-on's main scripts you can't do that, because the add-on code does not execute in the context of a page, and the dom is therefore not available.
... if you need to access the dom of a particular page, you need to use a content script.
...And 12 more matches

clipboard - Archive of obsolete content
interact with the system clipboard, setting and getting its contents.
... examples set and get the contents of the clipboard.
... var clipboard = require("sdk/clipboard"); clipboard.set("lorem ipsum dolor sit amet"); var contents = clipboard.get(); set the clipboard contents to some html.
...And 12 more matches

JavaScript crypto - Archive of obsolete content
using the mozilla crypto object from javascript mozilla defines a special javascript object to allow web pages access to certain cryptographic-related services.
...<script> function onsmartcardchange() { window.location.reload(); } function register() { window.crypto.enablesmartcardevents = true; document.addeventlistener("smartcard-insert", onsmartcardchange, false); document.addeventlistener("smartcard-remove", onsmartcardchange, false); } function deregister() { document.removeeventlistener("smartcard-insert", onsmartcardchange, false); document.rem...
...oveeventlistener("smartcard-remove", onsmartcardchange, false); } document.body.onload = register; document.body.onunload = deregister; </script> with the above example, your web site will automatically reload anytime a smartcard is inserted or removed.
...And 12 more matches

TCP/IP Security - Archive of obsolete content
tcp/ip is widely used throughout the world to provide network communications.
... tcp/ip communications are composed of four layers that work together.
... the four tcp/ip layers, from highest to lowest, are shown below.
...And 12 more matches

Cooperative asynchronous JavaScript: Timeouts and intervals - Learn web development
previous overview: asynchronous next this tutorial looks at the traditional methods javascript has available for running code asychronously after a set time period has elapsed, or at a regular interval (e.g.
... prerequisites: basic computer literacy, a reasonable understanding of javascript fundamentals.
... introduction for a long time, the web platform has offered javascript programmers a number of functions that allow them to asynchronously execute code after a certain time interval has elapsed, and to repeatedly execute a block of code asynchronously until you tell it to stop.
...And 12 more matches

JavaScript First Steps - Learn web development
in our first javascript module, we first answer some fundamental questions such as "what is javascript?", "what does it look like?", and "what can it do?", before moving on to taking you through your first practical experience of writing javascript.
... get started prerequisites before starting this module, you don't need any previous javascript knowledge, but you should have some familiarity with html and css.
... you are advised to work through the following modules before starting on javascript: getting started with the web (which includes a really basic javascript introduction).
...And 12 more matches

JS_ExecuteScriptPart
obsolete since javascript 1.9.3this feature is obsolete.
... js_executescriptpart has been removed in bug 555104.
... use js_executescript instead.
...And 12 more matches

Redis Tips
this document is a collection of some examples and tips for using redis, the open-source data structure server.
... so rather than thinking about redis as a database with some kind of non-existent relationship to sql, think of it as a data structure server with a rich set of commands for querying and manipulating those data structures over a network connection.
... counters set, incr, incrby list manipulation lpush, rpush, lpop, rpop, llen, linsert, lindex, etc.
...And 12 more matches

How to build an XPCOM component in JavaScript
if you are looking for add-on sdk solution for xpcom javascript components then check out platform/xpcom module first.
... this is a "hello world" tutorial for creating an xpcom component in javascript.
...if you want to use your component only from javascript, you can skip to the next section.
...And 12 more matches

Unicode property escapes - JavaScript
for instance, unicode property escapes can be used to match emojis, punctuations, letters (even letters from specific languages or scripts), etc.
... // non-binary values \p{unicodepropertyvalue} \p{unicodepropertyname=unicodepropertyvalue} // binary and non-binary values \p{unicodebinarypropertyname} // negation: \p is negated \p \p{unicodepropertyvalue} \p{unicodebinarypropertyname} general_category (gc) script (sc) script_extensions (scx) see also propertyvaluealiases.txt unicodebinarypropertyname the name of a binary property.
... note: as there are many properties and values available, we will not describe them exhaustively here but rather provide various examples rationale before es2018 there was no performance-efficient way to match characters from different sets based on scripts (like macedonian, greek, georgian etc.) or propertyname (like emoji etc) in javascript.
...And 12 more matches

Array - JavaScript
the javascript array class is a global object that is used in the construction of arrays; which are high-level, list-like objects.
... description arrays are list-like objects whose prototype has methods to perform traversal and mutation operations.
... neither the length of a javascript array nor the types of its elements are fixed.
...And 12 more matches

Code snippets - Archive of obsolete content
this is a quick list of useful code snippets (small code samples) available for developers of extensions for the various mozilla applications.
... window code opening and manipulating windows toolbar toolbar related code sidebar sidebar related code forms forms related code xml code used to parse, write, manipulate, etc.
... xml file i/o code used to read, write and process files drag & drop code used to setup and handle drag and drop events dialogs code used to display and process dialog boxes alerts and notifications modal and non-modal ways to notify users preferences code used to read, write, and modify preferences js xpcom code used to define and call xpcom components in javascript running applications code used to run other applications <canvas> related what wg canvas-related code signing a xpi how to sign an xpi with pki delayed execution performing background operations.
...And 11 more matches

Clipboard Test - Archive of obsolete content
<style></style> <style>.description{ display: block; font-size: 13pt; color: #444; font-style: italic; margin-bottom: 7px; } .method>.returns{display: none;} .method>.name>.param:not(:last-child):after{content: ","; padding-right: .5em; } .method>.name>.param:not(:last-child):after{content: ","; padding-right: .5em; } .method>.name>.param>.name:after{content: " as "; font-weight: normal; } .method>.params{display: block; color:#555;} .method>.params>.param{display: block; margin-bottom:5px;} .method>.params>.param>.name{font-weight:bold; margin-right:.5em; min-width:80px; display:inline-block;} .method>.params>.param>.description{display:inline-block; width:300px; vertical-align:top;margin-right:30px} .method>.params>.param>.type{display:inline-block; width:100px; vertical-align:top;font-wei...
...ght:bold;} .method>.params>.param>.type:before{content: "type "; color: #888; font-weight:normal;} .method>.params>.param>.default{display:inline-block; width:100px; vertical-align:top;font-weight:bold;} .method>.params>.param>.default:before{content: "default "; color: #888;font-weight:normal;} ]]></style> clipboard jetpack's clipboard support api provides a standardized way for features to access the clipboard.
... features can get and set the clipboard in various flavors of data type.
...And 11 more matches

Component; nsIPrefBranch
component: nsiprefbranch modules/libpref/public/nsiprefbranch.idlscriptable this interface is used to manipulate the preferences data.
... this object may be obtained from the preferences service (nsiprefservice) and used to get and set default and/or user preferences across the application.
...setcharpref(in string aprefname, in string avalue); requires gecko 58 void setstringpref(in string aprefname, in utf8string avalue); void setcomplexvalue(in string aprefname, in nsiidref atype, in nsisupports avalue); void setintpref(in string aprefname, in long avalue); void unlockpref(in string aprefname); attributes attribute type description root string called to get the root on which this branch is based, such as "browser.startup." read only.
...And 11 more matches

Intensive JavaScript - Firefox Developer Tools
by default the browser uses a single thread to run all the javascript in your page as well as to perform layout, reflows, and garbage collection.
... this means that long-running javascript functions can block the thread, leading to an unresponsive page and a bad user experience.
... you can use the frame rate and waterfall tools to see when javascript is causing performance problems, and to single out the particular functions that need attention.
...And 11 more matches

CanvasRenderingContext2D.clip() - Web APIs
the canvasrenderingcontext2d.clip() method of the canvas 2d api turns the current or given path into the current clipping region.
... it replaces any previous clipping region.
... in the image below, the red outline represents a clipping region shaped like a star.
...And 11 more matches

CanvasRenderingContext2D.ellipse() - Web APIs
the canvasrenderingcontext2d.ellipse() method of the canvas 2d api adds an elliptical arc to the current sub-path.
... syntax void ctx.ellipse(x, y, radiusx, radiusy, rotation, startangle, endangle [, anticlockwise]); the ellipse() method creates an elliptical arc centered at (x, y) with the radii radiusx and radiusy.
... parameters x the x-axis (horizontal) coordinate of the ellipse's center.
...And 11 more matches

RTCSessionDescription() - Web APIs
the rtcsessiondescription() constructor creates a new rtcsessiondescription with its properties initialized as described in the specified object.
... this constructor has been deprecated because rtcpeerconnection.setlocaldescription() and other methods which take sdp as input now directly accept an object conforming to the rtcsessiondescriptioninit dictionary, so you don't have to instantiate an rtcsessiondescription yourself.
... syntax sessiondescription = new rtcsessiondescription(rtcsessiondescriptioninit); values rtcsessiondescriptioninit optional an object providing the default values for the session description; the object conforms to the rtcsessiondescriptioninit dictionary.
...And 11 more matches

Audio and video manipulation - Developer guides
video manipulation the ability to read the pixel values from each frame of a video can be very useful.
... read the data from the intermediary <canvas> element and manipulate it.
... write the manipulated data to your "display" <canvas>.
...And 11 more matches

Functions - JavaScript
in javascript, functions are first-class objects, because they can have properties and methods just like any other object.
... for more examples and explanations, see also the javascript guide about functions.
... description every function in javascript is a function object.
...And 11 more matches

OpenSearch description format
the opensearch description format lets a website describe a search engine for itself, so that a browser or other client application can use that search engine.
... opensearch description files can be advertised as described in autodiscovery of search plugins, and can be installed programmatically as described in adding search engines from web pages.
... opensearch description file the xml file that describes a search engine follows the basic template below.
...And 11 more matches

<clipPath> - SVG: Scalable Vector Graphics
the <clippath> svg element defines a clipping path, to be used by the clip-path property.
... a clipping path restricts the region to which paint can be applied.
... conceptually, parts of the drawing that lie outside of the region bounded by the clipping path are not drawn.
...And 11 more matches

Clipboard - Archive of obsolete content
jetpack's clipboard support api provides a standardized way for features to access the clipboard.
... features can get and set the clipboard in various flavors of data type.
... the namespace associated with this api is jetpack.clipboard which provides both read and write access to the clipboard.
...And 10 more matches

Clipboard - Archive of obsolete content
jetpack's clipboard support api provides a standardized way for features to access the clipboard.
... features can get and set the clipboard in various flavors of data type.
... the namespace associated with this api is jetpack.clipboard which provides both read and write access to the clipboard.
...And 10 more matches

Clipboard - Archive of obsolete content
jetpack's clipboard support api provides a standardized way for features to access the clipboard.
... features can get and set the clipboard in various flavors of data type.
... the namespace associated with this api is jetpack.clipboard which provides both read and write access to the clipboard.
...And 10 more matches

Install script template - Archive of obsolete content
the keys are written according to the specification: http://mozilla.org/projects/plugins/first-install-problem.html and follows the plid specification: http://mozilla.org/projects/plugins/plugin-identifier.html **/ // define some global variables var plugin_file = "npmyplugin.dll"; // this plugin consists of an xpt file because it is scriptable // http://mozilla.org/projects/plugins/scripting-plugins.html var component_file = "npmypluginscriptable.xpt"; var plugin_size = 2000; // (dll file) reserve a little extra so it is not required to update too often var component_size = 10; // (xpi file) reserve a little extra so it is not required to update too often var software_name="cult3d mozilla viewer"; // plids (http://mozil...
... var plid = "@myplugin.com/myplugin,version=5.3"; var version = "5.3.0.0"; var mimetype = "application/x-my-plugin"; var suffix = "my"; var suffix_description = "my plugin files"; var company_name = "mypluginco"; var plugin_description = "my exemplary plugin mine all mine"; // registry constant paths // these will be used when the win32 registry keys are written var hkey_local_machine = "hkey_local_machine"; var hkey_current_user = "hkey_current_user"; var reg_moz_path = "software\\mozillaplugins"; // my own error code in case secondary installation fails var nosecondaryinstall = 1; // error return codes need some memory var err; // error return codes when we try and install to the current browser var errblock...
...1; // error return codes when we try and do a secondary installation var errblock2 = 0; // global variable containing our secondary install location var secondaryfolder; //special error values used by the cycore developers (www.cycore.com) who helped make this install script var exceptionoccurederror = -4711; var winregisnullerror = -4712; var invalidrootkeyerror = -4713; var registrykeynotwritableerror = -4714; //initinstall block //the installation is initialized here -- if we fail here, cancel the installation // initinstall is quite an overloaded method, but i have invoked it here with three strings // which are globally defined err = initinstall(software_name, plid, version); if (err != 0) { // call initinstall again in case illegal characters in plid...
...And 10 more matches

Multiple Queries - Archive of obsolete content
however, it is possible to use multiple queries.
...to use multiple queries, place each query element along with its rules inside a queryset element.
...the following is the basic structure of a template with multiple queries: <listbox datasources="..." ref="..."> <queryset> <query> ...
...And 10 more matches

Introducing asynchronous JavaScript - Learn web development
previous overview: asynchronous next in this article we briefly recap the problems associated with synchronous javascript, and take a first look at some of the different asynchronous techniques you'll encounter, showing how they can help us solve such problems.
... prerequisites: basic computer literacy, a reasonable understanding of javascript fundamentals.
... objective: to gain familiarity with what asynchronous javascript is, how it differs from synchronous javascript, and what use cases it has.
...And 10 more matches

Introducing JavaScript objects - Learn web development
in javascript, most things are objects, from core javascript features like arrays to the browser apis built on top of javascript.
...the object-based nature of javascript is important to understand if you want to go further with your knowledge of the language, therefore we've provided this module to help you.
...you are advised to work through the introduction to html and introduction to css modules before starting on javascript.
...And 10 more matches

Understanding client-side JavaScript frameworks - Learn web development
javascript frameworks are an essential part of modern front-end web development, providing developers with tried and tested tools for building scalable, interactive web applications.
... how do they relate to "vanilla" javascript or html?
... get started now, with "introduction to client-side frameworks" prerequisites you should really learn the basics of the core web languages first before attempting to move on to learning client-side frameworks — html, css, and especially javascript.
...And 10 more matches

Embedding Tips
how do i copy items to the clipboard?
... obtain the nsiclipboardcommands interface from the appropriate web browser object via nsiserviceprovider::getinterface (or the do_getinterface() helper method).
... here is a simple example which demonstrates the principle.
...And 10 more matches

IPDL Best Practices
lifetime management ensure ipdl deletes your protocol all protocols must be deleted.
...using ipdl generated structs as data structures outside of ipc serialization/deserialization ipdl generated structures are meant to facilitate serialization/deserialization and message passing.
... do not use them as data structures outside of ipdl, or wou will eventually find yourself in bad situations to implement proper memory management.
...And 10 more matches

JavaScript-DOM Prototypes in Mozilla
prototype setup on an xpconnect wrapped dom node in mozilla when a dom node is accessed from javascript in mozilla, the native c++ dom node is wrapped using xpconnect and the wrapper is exposed to javascript as the javascript representation of the dom node.
...all the methods that are supposed to show up on this jsobject are actually not properties of the object itself, but rather properties of the prototype of the jsobject for the wrapper (unless the c++ object's class info has the flag nsixpcscriptable::dont_share_prototype set, but lets assume that's not the case here).
... var obj = document.images[0]; here, obj will not really have any properties (except for the standard jsobject properties such as constructor, and the non-standard __parent__, __proto__, etc.), all the dom functionality of obj comes from obj's prototype (obj.__proto__) that xpconnect sets up when exposing the first image in document to javascript.
...And 10 more matches

Emscripten
emscripten is an llvm to javascript compiler.
...generated from c/c++ using clang, or from another language) and compiles that into javascript, which can be run on the web.
... important: this page provides a very brief introduction to what emscripten is.
...And 10 more matches

JS_NewScriptObject
return the javascript script object that wraps a compiled script.
... the compiled script and its parts live until the script object is garbage collected.
... syntax jsobject * js_newscriptobject(jscontext *cx, jsscript *script); name type description cx jscontext * the context in which to create the new script object.
...And 10 more matches

nsIZipReaderCache
modules/libjar/nsizipreader.idlscriptable please add a summary to this article.
... inherits from: nsisupports last changed in gecko 10.0 (firefox 10.0 / thunderbird 10.0 / seamonkey 2.7) implemented by: @mozilla.org/libjar/zip-reader-cache;1.
... to create an instance, use: var zipreadercache = components.classes["@mozilla.org/libjar/zip-reader-cache;1"] .createinstance(components.interfaces.nsizipreadercache); method overview nsizipreader getinnerzip(in nsifile zipfile, in autf8string zipentry); nsizipreader getinnerzip(in nsifile zipfile, in string zipentry); obsolete since gecko 10 nsizipreader getzip(in nsifile zipfile); void init(in unsigned long cachesize); methods getinnerzip() returns a (possibly shared) cached nsizipreader for a zip inside another zip.
...And 10 more matches

Clipboard.read() - Web APIs
the read() method of the clipboard interface requests a copy of the clipboard's contents, delivering the data to the returned promise when the promise is resolved.
... to read from the clipboard, you must first have the "clipboard-read" permission.
... note: the asynchronous clipboard and permissions apis are still in the process of being integrated into most browsers, so they often deviate from the official rules for permissions and the like.
...And 10 more matches

Clipboard.write() - Web APIs
the clipboard method write() writes arbitrary data, such as images, to the clipboard.
... the "clipboard-write" permission of the permissions api, is granted automatically to pages when they are in the active tab.
... note: browser support for the asynchronous clipboard apis is still in the process of being implemented.
...And 10 more matches

ClipboardItem - Web APIs
the clipboarditem interface of the clipboard api represents a single item format, used when reading or writing data via the clipboard api.
... that is clipboard.read() and clipboard.write() respectively.
... the benefit of having the clipboarditem interface to represent data, is that it enables developers to cope with the varying scope of file types and data easily.
...And 10 more matches

XRInputSource.gripSpace - Web APIs
the read-only xrinputsource property gripspace returns an xrspace whose native origin tracks the pose used to render virtual objects so they appear to be held in (or part of) the user's hand.
... syntax var xrspace = xrinputsource.gripspace; value an xrspace object representing the position and orientation of the input device in virtual space, suitable for rendering an image of the device into the scene.
... gripspace is null if the input source is inherently untrackable.
...And 10 more matches

<dl>: The Description List element - HTML: Hypertext Markup Language
the html <dl> element represents a description list.
... the element encloses a list of groups of terms (specified using the <dt> element) and descriptions (provided by <dd> elements).
... permitted content either: zero or more groups each consisting of one or more <dt> elements followed by one or more <dd> elements, optionally intermixed with <script> and <template> elements.
...And 10 more matches

Equality comparisons and sameness - JavaScript
algorithms in es2015: abstract equality comparison (==) strict equality comparison (===): used by array.prototype.indexof, array.prototype.lastindexof, and case-matching samevaluezero: used by %typedarray% and arraybuffer constructors, as well as map and set operations, and also string.prototype.includes and array.prototype.includes since es2016 samevalue: used in all other places javascript provides three different value-comparison operations: === - strict equality comparison ("strict equality", "identity", "triple equals") == - abstract equality comparison ("loose equality", "double equals") object.is provides samevalue (new in es2015).
...briefly: double equals (==) will perform a type conversion when comparing two things, and will handle nan, -0, and +0 specially to conform to ieee 754 (so nan != nan, and -0 == +0); triple equals (===) will do the same comparison as double equals (including the special handling for nan, -0, and +0) but without type conversion; if the types differ, false is returned.
... traditionally, and according to ecmascript, all objects are loosely unequal to undefined and null.
...And 10 more matches

Memory Management - JavaScript
in contrast, javascript automatically allocates memory when objects are created and frees it when they are not used anymore (garbage collection).
...the first and last parts are explicit in low-level languages but are mostly implicit in high-level languages like javascript.
... allocation in javascript value initialization in order to not bother the programmer with allocations, javascript will automatically allocate memory when values are initially declared.
...And 10 more matches

Object initializer - JavaScript
syntax let o = {} let o = {a: 'foo', b: 42, c: {}} let a = 'foo', b = 42, c = {} let o = {a: a, b: b, c: c} let o = { property: function (parameters) {}, get property() {}, set property(value) {} }; new notations in ecmascript 2015 please see the compatibility table for support for these notations.
... // shorthand property names (es2015) let a = 'foo', b = 42, c = {}; let o = {a, b, c} // shorthand method names (es2015) let o = { property(parameters) {} } // computed property names (es2015) let prop = 'foo' let o = { [prop]: 'hey', ['b' + 'ar']: 'there' } description an object initializer is an expression that describes the initialization of an object.
... object literal notation vs json the object literal notation is not the same as the javascript object notation (json).
...And 10 more matches

Drag and Drop JavaScript Wrapper - Archive of obsolete content
this section describes how to use the javascript wrapper for drag and drop.
... the javascript drag and drop wrapper the javascript wrapper to drag and drop simplifies the process by handling all of the xpcom interfaces for you.
...you can include this file in your xul file with the script tag in the same way you would include your own scripts.
...And 9 more matches

JavaScript Client API - Archive of obsolete content
overview this page describes how to use the internal client-side sync javascript api.
... please note that usage of the sync apis is governed by a terms of service: by accessing or using the firefox sync apis in connection with the development of your own client software to access the firefox sync services (a “third party client”), you acknowledge that you will need to install and use a local version of the firefox sync server for multiple account testing and that any use of mozilla’s hosted firefox sync services is subject to mozilla’s firefox sync terms of service at https://services.mozilla.com/tos/.
... before starting before you start learning the javascript api, you should spend some time on http://docs.services.mozilla.com/ reading about how the sync service operates.
...And 9 more matches

Install Scripts - Archive of obsolete content
« previousnext » this section describes the install script.
... creating an install script note: for firefox extensions, install.js are no longer used.
...the install script is even flexible enough to allow you to uninstall files.
...And 9 more matches

JavaScript - MDN Web Docs Glossary: Definitions of Web-related terms
summary javascript (or "js") is a programming language used most often for dynamic client-side scripts on webpages, but it is also often used on the server-side, using a runtime such as node.js.
... javascript should not be confused with the java programming language.
... although "java" and "javascript" are trademarks (or registered trademarks) of oracle in the u.s.
...And 9 more matches

What went wrong? Troubleshooting JavaScript - Learn web development
never fear — this article aims to save you from tearing your hair out over such problems by providing you with some tips on how to find and fix errors in javascript programs.
... prerequisites: basic computer literacy, a basic understanding of html and css, an understanding of what javascript is.
... fixing syntax errors earlier on in the course we got you to type some simple javascript commands into the developer tools javascript console (if you can't remember how to open this in your browser, follow the previous link to find out how).
...And 9 more matches

JavaScript code modules
note: these are not the same thing as standard javascript modules.
... javascript code modules let multiple privileged javascript scopes share code.
... general topics using javascript code modules an introduction to how to use javascript code modules.
...And 9 more matches

PR_CreatePipe
creates an anonymous pipe and retrieves file descriptors for the read and write ends of the pipe.
... syntax #include <prio.h> prstatus pr_createpipe( prfiledesc **readpipe, prfiledesc **writepipe); parameters the function has the following parameters: readpipe a pointer to a prfiledesc pointer.
... on return, this parameter contains the file descriptor for the read end of the pipe.
...And 9 more matches

SpiderMonkey: The Mozilla JavaScript runtime
spidermonkey is mozilla's javascript engine written in c and c++.
... using spidermonkey introduction to the javascript shell documentation of the command-line javascript shell, js.
... jsapi user guide this guide provides an overview of spidermonkey and describes how you can embed engine calls in your applications to make them javascript-aware.
...And 9 more matches

nsICacheEntryDescriptor
netwerk/cache/nsicacheentrydescriptor.idlscriptable this interface provides a cache entry descriptor.
...ng key); void markvalid(); nsiinputstream openinputstream(in unsigned long offset); nsioutputstream openoutputstream(in unsigned long offset); void setdatasize(in unsigned long size); void setexpirationtime(in pruint32 expirationtime); void setmetadataelement(in string key, in string value); void visitmetadata(in nsicachemetadatavisitor visitor); attributes attribute type description accessgranted nscacheaccessmode get the access granted to this descriptor.
... see nsicache for the definitions of the access modes and a thorough description of their corresponding meanings.
...And 9 more matches

nsIScriptableInputStream
xpcom/io/nsiscriptableinputstream.idlscriptable this interface provides scriptable access to a nsiinputstream instance.
...init() wrap the given nsiinputstream with this nsiscriptableinputstream.
... note: the init method may be called more than once, allowing a nsiscriptableinputstream instance to be reused.
...And 9 more matches

mask-clip - CSS: Cascading Style Sheets
the mask-clip css property determines the area which is affected by a mask.
... /* <geometry-box> values */ mask-clip: content-box; mask-clip: padding-box; mask-clip: border-box; mask-clip: margin-box; mask-clip: fill-box; mask-clip: stroke-box; mask-clip: view-box; /* keyword values */ mask-clip: no-clip; /* non-standard keyword values */ -webkit-mask-clip: border; -webkit-mask-clip: padding; -webkit-mask-clip: content; -webkit-mask-clip: text; /* multiple values */ mask-clip: padding-box, no-clip; mask-clip: view-box, fill-box, border-box; /* global values */ mask-clip: inherit; mask-clip: initial; mask-clip: unset; syntax one or more of the keyword values listed below, separated by commas.
... values content-box the painted content is clipped to the content box.
...And 9 more matches

String - JavaScript
the string object is used to represent and manipulate a sequence of characters.
... description strings are useful for holding data that can be represented in text form.
...the first is the charat() method: return 'cat'.charat(1) // returns "a" the other way (introduced in ecmascript 5) is to treat the string as an array-like object, where individual characters correspond to a numerical index: return 'cat'[1] // returns "a" when using bracket notation for character access, attempting to delete or assign a value to these properties will not succeed.
...And 9 more matches

JavaScript timers - Archive of obsolete content
a block of javascript code is generally executed synchronously.
... but there are some javascript native functions (timers) which allow us to delay the execution of arbitrary instructions: settimeout() setinterval() setimmediate() requestanimationframe() the settimeout() function is commonly used if you wish to have your function called once after the specified delay.
... documentation settimeout() calls a function or executes a code snippet after specified delay.
...And 8 more matches

Exception logging in JavaScript - Archive of obsolete content
in versions of firefox prior to firefox 3, all javascript exceptions were always logged into the error console if they remained unhandled at the time execution returned back into c++ code.
... as a result, if, for example, c++ code called a javascript component, which threw an exception, that exception would be logged to the console before control was returned to the c++ caller.
...javascript code is sometimes designed to throw exceptions to report a result condition back to the c++ caller.
...And 8 more matches

Creating JavaScript callbacks in components
these interfaces are used to manipulate the component in c++ and javascript.
...here is a very simple example of the observer pattern: [scriptable, uuid(...)] interface stringparserobserver { void onword(string word); }; [scriptable, uuid(...)] interface stringparser { void parse(string data); void addobserver(stringparserobserver observer); }; in this example, the stringparser will call the stringparserobserver.onword method whenever it finishes parsing a word found in the raw string data.
...javascript functions as callbacks another common use of the pattern is found in addeventlistener / removeeventlistener.
...And 8 more matches

Frame script environment
the frame script's global is a contentframemessagemanager, giving it the following environment: content the dom window of the content loaded in the browser.
... in particular, note that a frame script accesses the dom window using content, not window: // frame script var links = content.document.getelementsbytagname("a"); all the frame scripts running in a tab share this global.
... however, any top-level variables defined by a script are not stored on the global: instead, top-level variables are stored in a special per-script object that delegates to the per-tab global.
...And 8 more matches

Limitations of frame scripts
frame scripts run with system privileges and have access to the components object, enabling them to use xpcom objects and jsms.
...anything that just manipulates data structures will just work.
...however, some apis that work in the chrome process will not work in a frame script.
...And 8 more matches

Frame script environment
the frame script's global is a contentframemessagemanager, giving it the following environment: content the dom window of the content loaded in the browser may be null (see below) docshell the nsidocshell associated with the browser.
... in particular, note that a frame script accesses the dom window using content, not window: // frame script var links = content.document.getelementsbytagname("a"); all of the frame scripts running in a tab share this global.
... however, any top-level variables defined by a script are not stored on the global: instead, top-level variables are stored in a special per-script object that delegates to the per-tab global.
...And 8 more matches

JSObjectPrincipalsFinder
jsobjectprincipalsfinder is the type of a security callback that can be configured using js_setobjectprincipalsfinderjsapi 1.8 and earlier or js_setruntimesecuritycallbacksadded in spidermonkey 1.8.1.
... callback syntax typedef jsprincipals * (* jsobjectprincipalsfinder)(jscontext *cx, jsobject *obj); name type description cx jscontext * the context in which to find principals.
... obj jsobject * the object whose principals are needed.
...And 8 more matches

JS_ExecuteScriptVersion
this article covers features introduced in spidermonkey 1.8.5 execute a compiled script with specified version.
... syntax jsbool js_executescriptversion(jscontext *cx, jsobject *obj, jsobject *scriptobj, jsval *rval, jsversion version); name type description cx jscontext * the context in which to execute the script.
... obj jsobject * the scope in which to execute the script.
...And 8 more matches

nsIProcess
xpcom/threads/nsiprocess.idlscriptable this interface represents an executable process.
...to create an instance, use: var process = components.classes["@mozilla.org/process/util;1"] .createinstance(components.interfaces.nsiprocess); method overview void init(in nsifile executable); void initwithpid(in unsigned long pid); obsolete since gecko 1.9.2 void kill(); void run(in boolean blocking, [array, size_is(count)] in string args, in unsigned long count); void runasync([array, size_is(count)] in string args, in unsigned long count, [optional] in nsiobserver observer, [optional] in boolean holdweak); void runw(in boolean blocking, [array, size_is(count)] in wstrin...
...g args, in unsigned long count); void runwasync([array, size_is(count)] in wstring args, in unsigned long count, [optional] in nsiobserver observer, [optional] in boolean holdweak); attributes attribute type description exitvalue long the value returned by the process upon exit.
...And 8 more matches

nsIProtocolHandler
netwerk/base/nsiprotocolhandler.idlscriptable this interface is used to implement protocol handlers.
... inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview boolean allowport(in long port, in string scheme); nsichannel newchannel(in nsiuri auri); nsiuri newuri(in autf8string aspec, in string aorigincharset, in nsiuri abaseuri); attributes attribute type description defaultport long the default port is the port the protocol uses by default.
... constants constant value description uri_std 0 a standard full uri with authority component and understanding relative uris; this includes http and ftp, for example.
...And 8 more matches

Clipboard API - Web APIs
the clipboard api provides the ability to respond to clipboard commands (cut, copy, and paste) as well as to asynchronously read from and write to the system clipboard.
... access to the contents of the clipboard is gated behind the permissions api: the clipboard-write permission is granted automatically to pages when they are in the active tab.
... the clipboard-read permission must be requested, which you can do by trying to read data from the clipboard.
...And 8 more matches

Navigator.clipboard - Web APIs
the clipboard api adds to the navigator interface the read-only clipboard property, which returns the clipboard object used to read and write the clipboard's contents.
... the clipboard api can be used to implement cut, copy, and paste features within a web application.
... use of the asynchronous clipboard read and write methods requires that the user grant the web site or app permission to access the clipboard.
...And 8 more matches

ServiceWorkerGlobalScope: pushsubscriptionchange event - Web APIs
the pushsubscriptionchange event is sent to the global scope of a serviceworker to indicate a change in push subscription that was triggered outside the application's control.
... this may occur if the subscription was refreshed by the browser, but it may also happen if the subscription has been revoked or lost.
... bubbles no cancelable no interface pushsubscriptionchangeevent event handler property onpushsubscriptionchange usage notes although examples demonstrating how to share subscription related information with the application server tend to use fetch(), this is not necessarily the best choice for real-world use, since it will not work if the app is offline, for example.
...And 8 more matches

Loops and iteration - JavaScript
this chapter of the javascript guide introduces the different iteration statements available to javascript.
... the statements for loops provided in javascript are: for statement do...while statement while statement labeled statement break statement continue statement for...in statement for...of statement for statement a for loop repeats until a specified condition evaluates to false.
... the javascript for loop is similar to the java and c for loop.
...And 8 more matches

Deprecated and obsolete features - JavaScript
this page lists features of javascript that are deprecated (that is, still available but planned for removal) and obsolete (that is, no longer usable).
...this does not affect their use in replacement strings: property description $1-$9 parenthesized substring matches, if any.
... the following are now properties of regexp instances, no longer of the regexp object: property description global whether or not to test the regular expression against all possible matches in a string, or only against the first.
...And 8 more matches

<mmultiscripts> - MathML
the mathml <mmultiscripts> element allows you to create tensor-like objects.
... in a descriptive way tensors are multidimensional matrices (mathematical imprecise but exemplified).
...to learn more about the mathematical background of tensors refer to the entry on wikipedia.
...And 8 more matches

Cross-domain Content Scripts - Archive of obsolete content
by default, content scripts don't have any cross-domain privileges.
... them to your add-on's package.json under the "cross-domain-content" key, which itself lives under the "permissions" key: "permissions": { "cross-domain-content": ["http://example.org/", "http://example.com/"] } the domains listed must include the scheme and fully qualified domain name, and these must exactly match the domains serving the content - so in the example above, the content script will not be allowed to access content served from https://example.com/.
... this feature is currently only available for content scripts, not for page scripts included in html files shipped with your add-on.
...And 7 more matches

Downloading JSON and JavaScript in extensions - Archive of obsolete content
a common practice found in many extensions is using xmlhttprequest (or some other mechanism) to download javascript or json (they are different) from a remote website.
... once the content has been downloaded, the extension authors proceed to use eval() to decode the string content into javascript objects.
... the practice is dangerous because the decoded javascript has full chrome privileges and could perform some nasty actions.
...And 7 more matches

Multiple Rule Example - Archive of obsolete content
« previousnext » the most common use of multiple rules is to apply different action bodies to different results.
...for instance, in an earlier example, one of the photos had a description and the other photos did not.
... in this case, you might wish to display the photo with a description in a different manner.
...And 7 more matches

Multiple Rules - Archive of obsolete content
the builder supports the use of multiple rules as well.
...a multiple rule template looks like the following: <hbox id="photoslist" datasources="template-guide-photos3.rdf" ref="http://www.xulplanet.com/rdf/myphotos"> <template> <query> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> </quer...
... operatordescriptionexample equalsmatch if a value equals anothermatch a specific value lessmatch if a number is less than anothermatch only negative values with one rule, positive values with another greatermatch if a number is greater than anotherdisplay values greater than 1000 differently beforematch if a value comes before another alphabetically aftermatch if a value comes after another alphabetically starts...
...And 7 more matches

New in JavaScript 1.8.5 - Archive of obsolete content
the following is a changelog for javascript 1.8.5.
... new features in javascript 1.8.5 new functions function description object.create() creates a new object with the specified prototype object and properties.
... bug 492840 object.defineproperty() adds the named property described by a given descriptor to an object.
...And 7 more matches

ECMAScript 5 support in Mozilla - Archive of obsolete content
ecmascript 5.1, an older version of the standard upon which javascript is based, was approved in june 2011.
... the javascript runtime used in the latest versions of mozilla projects including both firefox and thunderbird has full support for ecmascript 5.1 features.
... this article covers the features supported by different versions of mozilla's javascript runtime.
...And 7 more matches

Sending forms through JavaScript - Learn web development
but forms can also prepare an http request to send via javascript, for example via xmlhttprequest.
... sending arbitrary data asynchronously is generally called ajax, which stands for "asynchronous javascript and xml".
...for transmitting binary data, the http request is reshaped into multipart/form-data.
...And 7 more matches

Rhino JavaScript compiler
overview the javascript compiler translates javascript source into java class files.
... the resulting java class files can then be loaded and executed at another time, providing a convenient method for transferring javascript, and for avoiding translation cost.
... note that the top-level functions available to the shell (such as print) are not available to compiled scripts when they are run outside the shell.
...And 7 more matches

JSPRINCIPALS_HOLD
increment or decrement the reference count of a jsprincipals object.
... syntax jsprincipals_hold(cx, principals) jsprincipals_drop(cx, principals) name type description cx jscontext * a context.
... principals jsprincipals * pointer to the jsprincipals object to hold or drop.
...And 7 more matches

JS_DecompileScript
return the source code of the script or the function.
... syntax jsstring * js_decompilescript(jscontext *cx, js::handle<jsscript*> script); name type description cx jscontext * the context to use to decompile the script.
... script js::handle<jsscript*> script or function to decompile.
...And 7 more matches

nsIScriptableIO
file and stream guide: [ nsiscriptableio | accessing files | getting file information | reading from files | writing to files | moving, copying and deleting files | uploading and downloading files | working with directories ] important note: the pages from the file and stream guide use the io object (nsiscriptableio), which was not available in any released version of the platform (pending some fixes).
...other documentation on files and i/o not using the unavailable nsiscriptableio apis: code snippets: file i/o, open and save dialogs, reading textual data, writing textual data, list of file-related error codes.
... nsiscriptableio provides a convenient api for creating files and streams, as well as for reading and writing data to them.
...And 7 more matches

Scripting plugins - Plugins
this document also explains how to make a plugin use these new extensions to be scriptable as well as how to access objects in a browser.
... (a bit of history: npapi plugins that used to take advantage of being scriptable via liveconnect in 4.x netscape browsers lost this possibility in mozilla (due to the jni making the netscape 4.x jri obsolete).
... as an answer to this large gap in the netscape plugin api, an extension to the api has been developed that lets plugins be scriptable again, independent of java.
...And 7 more matches

BluetoothRemoteGATTDescriptor - Web APIs
the bluetoothremotegattdescriptor interface of the web bluetooth api provides a gatt descriptor, which provides further information about a characteristic’s value.
... interface interface bluetoothremotegattdescriptor { readonly attribute bluetoothgattcharacteristic characteristic; readonly attribute uuid uuid; readonly attribute arraybuffer?
... value; promise<arraybuffer> readvalue(); promise<void> writevalue(buffersource value); }; properties bluetoothremotegattdescriptor.characteristicread only returns the bluetoothremotegattcharacteristic this descriptor belongs to.
...And 7 more matches

Traversing an HTML table with JavaScript and DOM Interfaces - Web APIs
introduction this article is an overview of some powerful, fundamental dom level 1 methods and how to use them from javascript.
...dom level 1 includes both methods for generic document access and manipulation (dom 1 core) as well as methods specific to html documents (dom 1 html).
... example: creating an html table dynamically (sample1.html) html <input type="button" value="generate a table." onclick="generate_table()"> javascript function generate_table() { // get the reference for the body var body = document.getelementsbytagname("body")[0]; // creates a <table> element and a <tbody> element var tbl = document.createelement("table"); var tblbody = document.createelement("tbody"); // creating all cells for (var i = 0; i < 2; i++) { // creates a table row var row = document.createelement("tr"); for (var j = 0; j < 2; j++) { // create a <td> element and a text node, make the text // node the contents of the <td>, and put the <td> at // the end of the table row var cell = document.createelement("td"); var c...
...And 7 more matches

PaymentResponse.shippingAddress - Web APIs
the shippingaddress read-only property of the paymentrequest interface returns a paymentaddress object containing the shipping address provided by the user.
... syntax var shippingaddress = paymentrequest.shippingaddress; value a paymentaddress object providing details comprising the shipping address provided by the user.
... example generally, the user agent will fill the shippingaddress property for you.
...And 7 more matches

PushManager.getSubscription() - Web APIs
the pushmanager.getsubscription() method of the pushmanager interface retrieves an existing push subscription.
... it returns a promise that resolves to a pushsubscription object containing details of an existing subscription.
... if no existing subscription exists, this resolves to a null value.
...And 7 more matches

ScriptProcessorNode - Web APIs
the scriptprocessornode interface allows the generation, processing, or analyzing of audio using javascript.
... the scriptprocessornode interface is an audionode audio-processing module that is linked to two buffers, one containing the input audio data, one containing the processed output audio data.
... the size of the input and output buffer are defined at the creation time, when the audiocontext.createscriptprocessor() method is called (both are defined by audiocontext.createscriptprocessor()'s buffersize parameter).
...And 7 more matches

clip - CSS: Cascading Style Sheets
the clip css property defines a visible portion of an element.
... the clip property applies only to absolutely positioned elements — that is, elements with position:absolute or position:fixed.
... /* keyword value */ clip: auto; /* <shape> values */ clip: rect(1px 10em 3rem 2ch); clip: rect(1px, 10em, 3rem, 2ch); /* global values */ clip: inherit; clip: initial; clip: unset; syntax note: where possible, authors are encouraged to use the newer clip-path property instead.
...And 7 more matches

Function.name - JavaScript
javascript compressors and minifiers warning: be careful when using function.name and source code transformations, such as those carried out by javascript compressors (minifiers) or obfuscators.
... these tools are often used as part of a javascript build pipeline to reduce the size of a program prior to deploying it to production.
...if you rely on function.name, like in the example above, make sure your build pipeline doesn't change function names, or don't assume a function to have a particular name.
...And 7 more matches

Math.imul() - JavaScript
the math.imul() function returns the result of the c-like 32-bit multiplication of the two parameters.
... return value the result of the c-like 32-bit multiplication of the given arguments.
... description math.imul() allows for 32-bit integer multiplication with c-like semantics.
...And 7 more matches

Object.defineProperties() - JavaScript
each value in props must be either a data descriptor or an accessor descriptor; it cannot be both (see object.defineproperty() for more details).
... data descriptors and accessor descriptors may optionally contain the following keys: configurable true if and only if the type of this property descriptor may be changed and if the property may be deleted from the corresponding object.
... a data descriptor also has the following optional keys: value the value associated with the property.
...And 7 more matches

RegExp - JavaScript
for an introduction to regular expressions, read the regular expressions chapter in the javascript guide.
... description literal notation and constructor there are two ways to create a regexp object: a literal notation and a constructor.
... flags in constructor starting with ecmascript 6, new regexp(/ab+c/, 'i') no longer throws a typeerror ("can't supply flags when constructing one regexp from another") when the first argument is a regexp and the second flags argument is present.
...And 7 more matches

parseInt() - JavaScript
the description below explains in more detail what happens when radix is not provided.
... description the parseint function converts its first argument to a string, parses that string, then returns an integer or nan.
... parseint understands exactly two signs: + for positive, and - for negative (since ecmascript 1).
...And 7 more matches

with - JavaScript
see the "ambiguity contra" paragraph in the "description" section below for details.
...to execute multiple statements, use a block statement ({ ...
... description javascript looks up an unqualified name by searching a scope chain associated with the execution context of the script or function containing that unqualified name.
...And 7 more matches

clip-path - SVG: Scalable Vector Graphics
the clip-path presentation attribute defines or associates a clipping path with the element it is related to.
... note: as a presentation attribute clip-path can be used as a css property.
... as a presentation attribute, it can be applied to any element but it has noticeable effects mostly on the following nineteen elements: <a>, <circle>, <clippath>, <ellipse>, <g>, <glyph>, <image>, <line>, <marker>, <mask>, <path>, <pattern>, <polygon>, <polyline>, <rect>, <svg>, <symbol>, <text>, <use> html,body,svg { height:100% } <svg viewbox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"> <clippath id="myclip" clippathunits="objectboundingbox"> <circle cx=".5" cy=".5" r=".5" /> </clippath> <!-- top-left: apply a custom defined clipping path --> <rect x="1" y="1" width="8" height="8" stroke="green" clip-path="url(#myclip)" /> <!-- top-right: apply a css basic shape on a fill-box geometry.
...And 7 more matches

<ellipse> - SVG: Scalable Vector Graphics
the <ellipse> element is an svg basic shape, used to create ellipses based on a center coordinate, and both their x and y radius.
... note: ellipses are unable to specify the exact orientation of the ellipse (if, for example, you wanted to draw an ellipse tilted at a 45 degree angle), but it can be rotated by using the transform attribute.
... html,body,svg { height:100% } <svg viewbox="0 0 200 100" xmlns="http://www.w3.org/2000/svg"> <ellipse cx="100" cy="50" rx="100" ry="50" /> </svg> attributes cx the x position of the ellipse.
...And 7 more matches

Label and description - Archive of obsolete content
line breaking under normal conditions, a description will not break long-running text and the text may be cropped or hidden.
... to cause the text to wrap: ensure the long-running text is a text node child of <description/> or <label/> (i.e., do not specify the long-running text in the value attribute of these elements).
... <description>i am your father's brother's nephew's cousin's former roommate.
...And 6 more matches

Manipulating Lists - Archive of obsolete content
list manipulation the listbox element provides numerous methods to retrieve and manipulate its items.
... although listboxes may be manipulated using the standard dom functions as well, it is recommended that the specialized listbox functions be used instead when possible.
...here is an example: example 1 : source view <script> function additem(){ document.getelementbyid('thelist').appenditem("thursday", "thu"); } </script> <listbox id="thelist"/> <button label="add" oncommand="additem();"/> the appenditem() takes two arguments, the label, in this case 'thursday', and a value 'thu'.
...And 6 more matches

script - Archive of obsolete content
« xul reference home [ examples | attributes | properties | methods | related ] much like the html script element, this is used to declare a script to be used by the xul window.
... you should usually put scripts in a separate file pointed to by the src attribute, but you may also place the script inline inside the opening and closing script tags.
... attributes src, type examples <script src="test.js"/> <script src="http://example.com/js/test.js"/> <script> function foo(){ // code } </script> attributes src type: uri the uri of the script.
...And 6 more matches

New in JavaScript 1.1 - Archive of obsolete content
the following is a changelog for javascript from netscape navigator 2.0 to 3.0.
...netscape navigator 3.0 was the second major version of the browser with javascript support.
... javascript versions netscape navigator 3.0 also introduced javascript language versions.
...And 6 more matches

New in JavaScript 1.8 - Archive of obsolete content
the following is a changelog for javascript 1.8.
...see bug 380236 for a tracking development bug for javascript 1.8.
... using javascript 1.8 in order to use some of the new features of javascript 1.8 in html, use: <script type="application/javascript;version=1.8"> ...
...And 6 more matches

JSPrincipalsTranscoder
jsprincipalstranscoder is the type of a security callback that can be configured using js_setprincipalstranscoderjsapi 1.8 and earlier or js_setruntimesecuritycallbacksadded in spidermonkey 1.8.1.
... callback syntax typedef jsbool (*jsprincipalstranscoder)(jsxdrstate *xdr, jsprincipals **principalsp); name type description xdr jsxdrstate * the xdr reader/writer.
... principalsp jsprincipals ** if xdr->mode == jsxdr_decode, this is an out parameter: on success, *principalsp receives the deserialized principals.
...And 6 more matches

JSPropertyDescriptor
a descriptor is used to declare whether an attribute can be written to whether it can delete an object that can enumerate and specify content.
... properties a descriptor is an object that can have the following key values field name description getter the get syntax binds an object property to a function that will be called when that property is looked up.
... value describes the value of the specified property, which can be any valid javascript value (function, object, string...) configurable declare that the property can be modified and deleted enumerable declare that the property can be enumerated, and the enumerable genus can be traversed by the for...in loop.
...And 6 more matches

nsIClipboardDragDropHookList
widget/public/nsiclipboarddragdrophooklist.idlscriptable this interface is an internal gecko component.
... it provides basic operations such as adding, removing and enumerating clipboard hooks for the nsiclipboarddragdrophooks interface.
...you should access these capabilities indirectly by sending commands using the nsiclipboarddragdrophooks interface.
...And 6 more matches

Clipboard.readText() - Web APIs
the clipboard interface's readtext() method returns a promise which resolves with a copy of the textual contents of the system clipboard..
... the "clipboard-read" permission of the permissions api must be granted before you can read data from the clipboard.
... syntax var promise = navigator.clipboard.readtext() parameters none.
...And 6 more matches

Clipboard.writeText() - Web APIs
the clipboard interface's writetext() property writes the specified text string to the system clipboard.
... the "clipboard-write" permission of the permissions api, is granted automatically to pages when they are in the active tab.
... note: browser support for the asynchronous clipboard apis is still in the process of being implemented.
...And 6 more matches

PaymentRequest.shippingAddress - Web APIs
the shippingaddress read-only property of the paymentrequest interface returns the shipping address provided by the user.
... syntax var paymentaddress = paymentrequest.shippingaddress; example generally, the user agent will fill the shippingaddress property value.
... you can trigger this by setting paymentoptions.requestshipping to true when calling the paymentrequest constructor.
...And 6 more matches

PaymentRequest.shippingOption - Web APIs
the shippingoption read-only attribute of the paymentrequest interface returns either the id of a selected shipping option, null (if no shipping option was set to be selected) or a shipping option selected by the user.
... it is initially null by when no "selected" shipping options are provided.
... this attribute is only populated if the constructor is called with the requestshipping flag set to true.
...And 6 more matches

PushSubscription - Web APIs
the pushsubscription interface of the push api provides a subcription's url endpoint and allows unsubscription from a push service.
... properties pushsubscription.endpoint read only a usvstring containing the endpoint associated with the push subscription.
... pushsubscription.expirationtime read only a domhighrestimestamp of the subscription expiration time associated with the push subscription, if there is one, or null otherwise.
...And 6 more matches

scripting - CSS: Cascading Style Sheets
the scripting css media feature can be used to test whether scripting (such as javascript) is available.
... syntax the scripting feature is specified as a keyword value chosen from the list below.
... none scripting is completely unavailable on the current document.
...And 6 more matches

text-decoration-skip - CSS: Cascading Style Sheets
the text-decoration-skip css property sets what parts of an element’s content any text decoration affecting the element must skip over.
... note: most other browsers are converging on supporting the simpler text-decoration-skip-ink property.
... /* keyword values */ text-decoration-skip: none; text-decoration-skip: objects; text-decoration-skip: spaces; text-decoration-skip: edges; text-decoration-skip: box-decoration; /* multiple keywords */ text-decoration-skip: objects spaces; text-decoration-skip: leading-spaces trailing-spaces; text-decoration-skip: objects edges box-decoration; /* global values */ text-decoration-skip: inherit; text-decoration-skip: initial; text-decoration-skip: unset; syntax values none nothing is skipped.
...And 6 more matches

<noscript> - HTML: Hypertext Markup Language
the html <noscript> element defines a section of html to be inserted if a script type on the page is unsupported or if scripting is currently turned off in the browser.
... permitted content when scripting is disabled and when it is a descendant of the <head> element: in any order, zero or more <link> elements, zero or more <style> elements, and zero or more <meta> elements.
... when scripting is disabled and when it isn't a descendant of the <head> element: any transparent content, but no <noscript> element must be among its descendants.
...And 6 more matches

Closures - JavaScript
in javascript, closures are created every time a function is created, at function creation time.
...however, because the code still works as expected, this is obviously not the case in javascript.
... the reason is that functions in javascript form closures.
...And 6 more matches

FinalizationRegistry - JavaScript
description finalizationregistry provides a way to request that a cleanup callback get called at some point when an object registered with the registry has been reclaimed (garbage-collected).
...when, how, and whether garbage collection occurs is down to the implementation of any given javascript engine.
...garbage collection is a hard problem that javascript engine implementers are constantly refining and improving their solutions to.
...And 6 more matches

JSON - JavaScript
the json object contains methods for parsing javascript object notation (json) and converting values to json.
... description javascript and json differences json is a syntax for serializing objects, arrays, numbers, strings, booleans, and null.
... it is based upon javascript syntax but is distinct from it: some javascript is not json.
...And 6 more matches

Number - JavaScript
number is a primitive wrapper object used to represent and manipulate numbers like 37 or -9.25.
... the javascript number type is a double-precision 64-bit binary format ieee 754 value, like double in java or c#.
... a number literal like 37 in javascript code is a floating-point value, not an integer.
...And 6 more matches

Object - JavaScript
the object class represents one of javascript's data types.
... description nearly all objects in javascript are instances of object; a typical object inherits properties (including methods) from object.prototype, although these properties may be shadowed (a.k.a.
... object.defineproperty() adds the named property described by a given descriptor to an object.
...And 6 more matches

RegExp.prototype.exec() - JavaScript
javascript regexp objects are stateful when they have the global or sticky flags set (e.g.
...using this internally, exec() can be used to iterate over multiple matches in a string of text (with capture groups), as opposed to getting just the matching strings with string.prototype.match().
... a newer function has been proposed to simplify matching multiple parts of a string (with capture groups): string.prototype.matchall().
...And 6 more matches

WeakRef - JavaScript
description a weakref object contains a weak reference to an object, which is called its target or referent.
...when an object no longer has any strong references to it, the javascript engine's garbage collector may destroy the object and reclaim its memory.
...when, how, and whether garbage collection occurs is down to the implementation of any given javascript engine.
...And 6 more matches

switch - JavaScript
description a switch statement first evaluates its expression.
...(if multiple cases match the provided value, the first case that matches is selected, even if the cases are not equal to each other.) if no matching case clause is found, the program looks for the optional default clause, and if found, transfers control to that clause, executing the associated statements.
... if you forget a break then the script will run from the case where the criterion is met and will run the cases after that regardless if a criterion was met.
...And 6 more matches

clip - SVG: Scalable Vector Graphics
the clip attribute is a presentation attribute defining the visible region of an element.
... this attribute has the same parameter values as defined for the css clip property.
...the value of auto defines a clipping path along the bounds of the viewport created by the given element.
...And 6 more matches

Defining Cross-Browser Tooltips - Archive of obsolete content
summary: authors are used to having alt text appear as a &quot;tooltip&quot; above images, but that's not how it was meant to be used.
... learn how to define &quot;tooltips&quot; in a cross-browser, standards-friendly way.
... authors are used to using the alt attribute to create "tooltips" in web browsers.
...And 5 more matches

XULRunner tips - Archive of obsolete content
window url window type extension manager chrome://mozapps/content/extensions/extensions.xul?type=extensions extension:manager-extensions theme manager chrome://mozapps/content/extensions/extensions.xul?type=themes extension:manager-themes javascript console chrome://global/content/console.xul global:console about:config chrome://global/content/config.xul developer extensions venkman need a custom build or a compatible extension need to edit compatibility in needs a method to start venkman (usually by overlaying the main xul file, similar to existing code for firefox, suite, etc.) the function toopenwind...
... save the dom_inspector-*.xpi package to a temporary directory unzip the package copy the following files: chrome/inspector.jar to the chrome directory of your xulrunner application components/inspector-cmdline.js to your components directory defaults/preferences/inspector.js to your preferences directory open your chrome.manifest file and add these lines: content inspector jar:inspector.jar!/content/inspector/ xpcnativewrappers=no...
...andoverlay.xul chrome://inspector/content/viewers/dom/commandoverlay.xul to launch dom inspector in your application, you need to open its main window, with a command like this: window.open("chrome://inspector/content/inspector.xul", "", "chrome"); alternatively, the dom inspector may also be added as an extension: (if you already have inspector installed for another application you can skip to the next step) follow the instructions above through "unzip the package." create a file in the extensions directory of your application with the same name as the dom inspector id (inspector@mozilla.org) containing one line of text -- the exact path to the root directory of dom inspector (where the install.rdf is) like this one: /home/username/.mozilla/firefox/numbersandletters/extensions/...
...And 5 more matches

Shipping a plugin as a Toolkit bundle - Archive of obsolete content
historically, most people have chosen to use an install.js script to install a plugin.
...as of firefox 3 (and any gecko 1.9 based application) the use of install.js scripts is no longer supported and plugins must either be shipped as an executable installer or in a bundle as described here.
...the library and scripting interfaces are held in the plugins directory.
...And 5 more matches

New in JavaScript 1.2 - Archive of obsolete content
the following is a changelog for javascript from netscape navigator 3.0 to 4.0.
...netscape navigator 4.0 was the third major version of the browser with javascript support.
... javascript versions netscape navigator 4.0 executes javascript language versions up to 1.2.
...And 5 more matches

Archived JavaScript Reference - Archive of obsolete content
obsolete javascript features and unmaintained docs arguments.callerthe obsolete arguments.caller property used to provide the function that invoked the currently executing function.
... this property has been removed and no longer works.array comprehensionsthe array comprehension syntax was a javascript expression which allowed you to quickly assemble a new array based on an existing one.
...see also the newer version of date.prototype.tolocaledatestring().ecmascript 2016 to es.next support in mozillaexpression closuresexpression closures are a shorthand function syntax for writing simple functions.for each...inthe for each...in statement iterates a specified variable over all values of object's properties.
...And 5 more matches

VoIP - MDN Web Docs Glossary: Definitions of Web-related terms
voip (voice over internet protocol) is a technology used to transmit voice messages over ip (internet protocol) networks.
... common voip packages include skype, msn messenger, yahoo and many more.
... everything transferrred through voip is digital.
...And 5 more matches

Limitations of frame scripts
frame scripts run with system privileges and have access to the components object, enabling them to use xpcom objects and jsms.
...anything that just manipulates data structures will just work.
...however, some apis that work in the chrome process will not work in a frame script.
...And 5 more matches

HTMLIFrameElement.executeScript()
the executescript() method of the htmliframeelement interface allows a specified script to be executed against a page loaded in the browser <iframe>.
... syntax var mydomrequest = instanceofhtmliframeelement.executescript(script, options); return value a domrequest object that returns an onsuccess handler if the script is successfully executed against the loaded content, or an onerror handler if not.
... parameters script the script to be executed.
...And 5 more matches

IPDL Type Serialization
all types used in ipdl must be serializable.
... types are serialized and deserialized from an ipc::message type declared in ipc_message.h.
... each type specializes ipc::paramtraits as follows: namespace ipc { template <> struct paramtraits<mytype> { typedef mytype paramtype; static void write(message* amsg, const paramtype& aparam) { // implement serialization here } static bool read(const message* amsg, void** aiter, paramtype* aresult) { // implement deserialization here.
...And 5 more matches

Localizing extension descriptions
this article provides details on how to go about localizing the descriptions of mozilla add-ons, as well as for other metadata about your add-on.
... localizing in gecko 1.9 gecko 1.9 includes a new, more robust method for localizing add-on descriptions and other metadata.
... all of the different descriptions now appear in the install.rdf file using em:localized properties.
...And 5 more matches

Leak-hunting strategies and tips
build with --enable-trace-malloc common leak patterns when trying to find a leak of reference-counted objects, there are a number of patterns that could cause the leak: ownership cycles.
... the most common source of hard-to-fix leaks is ownership cycles.
...xpconnect allows an xpcom object to be exposed to javascript, and it allows certain javascript objects to be exposed to c++ code as normal xpcom objects.
...And 5 more matches

How to embed the JavaScript engine
a bare bones tutorial hello world sample embedding application the following code is a very simple application that shows how to embed spidermonkey and run a simple javascript script.
...ould want to exit this any // time you're spinning the event loop js::rootedobject global(cx, js_newglobalobject(cx, &global_class, nullptr)); if (!global) return 1; js::rootedvalue rval(cx); { // scope for jsautocompartment jsautocompartment ac(cx, global); js_initstandardclasses(cx, global); const char *script = "'hello'+'world, it is '+new date()"; const char *filename = "noname"; int lineno = 1; bool ok = js_evaluatescript(cx, global, script, strlen(script), filename, lineno, rval.address()); if (!ok) return 1; } jsstring *str = rval.tostring(); printf("%s\n", js_encodestring(cx, str)); } js_destroycontext(cx); js_destroyrunti...
...y // time you're spinning the event loop js::rootedobject global(cx, js_newglobalobject(cx, &global_class, nullptr, js::fireonnewglobalhook)); if (!global) return 1; js::rootedvalue rval(cx); { // scope for jsautocompartment jsautocompartment ac(cx, global); js_initstandardclasses(cx, global); const char *script = "'hello'+'world, it is '+new date()"; const char *filename = "noname"; int lineno = 1; bool ok = js_evaluatescript(cx, global, script, strlen(script), filename, lineno, &rval); if (!ok) return 1; } jsstring *str = rval.tostring(); printf("%s\n", js_encodestring(cx, str)); } js_destroycontext(cx); js_destroyruntime(rt); ...
...And 5 more matches

JS_DestroyScript
free a compiled script that is no longer needed.
... syntax void js_destroyscript(jscontext *cx, jsscript *script); name type description cx jscontext * the context in which to destroy the script.
... script jsscript * the script to destroy.
...And 5 more matches

nsIClipboardCommands
webshell/public/nsiclipboardcommands.idlscriptable an interface for embedding clients who wish to interact with the system-wide os clipboard.
... mozilla does not use a private clipboard, instead it places its data directly onto the system clipboard.
...canpaste() returns whether the current contents of the clipboard can be pasted and if the current selection is not read-only.
...And 5 more matches

nsIPrefService
modules/libpref/public/nsiprefservice.idlscriptable this interface is the main entry point into the back end preferences management library.
... the preference service is directly responsible for the management of the preferences files and also facilitates access to the preference branch object which allows the direct manipulation of the preferences themselves.
... inherits from: nsisupports last changed in gecko 1.7 method overview nsiprefbranch getbranch(in string aprefroot); nsiprefbranch getdefaultbranch(in string aprefroot); void readuserprefs(in nsifile afile); void resetprefs(); void resetuserprefs(); void savepreffile(in nsifile afile); methods getbranch() call to get a preferences "branch" which accesses user preference data.
...And 5 more matches

nsIScriptError2
js/src/xpconnect/idl/nsiscripterror.idlscriptable represents javascript errors and warnings for use by the console service; augments nsiscripterror by adding a way to initialize the error with the window id of the outer window with which the error is associated.
... 1.0 66 introduced gecko 2.0 obsolete gecko 12.0 inherits from: nsiscripterror last changed in gecko 9.0 (firefox 9.0 / thunderbird 9.0 / seamonkey 2.6) in gecko 12.0 this interface was merged into the nsiscripterror interface.
... method overview void initwithwindowid(in wstring message, in wstring sourcename, in wstring sourceline, in pruint32 linenumber, in pruint32 columnnumber, in pruint32 flags, in string category, in unsigned long long innerwindowid); attributes attribute type description innerwindowid unsigned long long the inner window id with which the error is associated.
...And 5 more matches

nsIZipEntry
content/base/public/nsidomserializer.idlscriptable please add a summary to this article.
... inherits from: nsisupports last changed in gecko 1.9 (firefox 3) attributes attribute type description compression unsigned short the type of compression used for the item.
... the possible values and their meanings are defined in the zip file specification at zip application note support.
...And 5 more matches

BaseAudioContext.createScriptProcessor() - Web APIs
the createscriptprocessor() method of the baseaudiocontext interface creates a scriptprocessornode used for direct audio processing.
... syntax var scriptprocessor = audioctx.createscriptprocessor(buffersize, numberofinputchannels, numberofoutputchannels); parameters buffersize the buffer size in units of sample-frames.
... returns a scriptprocessornode.
...And 5 more matches

PaymentRequest.onshippingoptionchange - Web APIs
the onshippingoptionchange event of the paymentrequest interface is fired whenever the user changes a shipping option.
... syntax paymentrequest.addeventlistener('shippingoptionchange', shippingoptionchangeevent => { ...
... }); paymentrequest.onshippingoptionchange = function(shippingoptionchangeevent) { ...
...And 5 more matches

PaymentResponse.shippingOption - Web APIs
the shippingoption read-only property of the paymentrequest interface returns the id attribute of the shipping option selected by the user.
... this option is only present when the requestshipping option is set to true in the paymentoptions object passed to the paymentrequest constructor.
... syntax var shippingoption = paymentrequest.shippingoption; example in the example below, the paymentrequest.onshippingaoptionchange event is called.
...And 5 more matches

RTCPeerConnection.currentLocalDescription - Web APIs
the read-only property rtcpeerconnection.currentlocaldescription returns an rtcsessiondescription object describing the local end of the connection as it was most recently successfully negotiated since the last time the rtcpeerconnection finished negotiating and connecting to a remote peer.
... also included is a list of any ice candidates that may already have been generated by the ice agent since the offer or answer represented by the description was first instantiated.
... to change the currentlocaldescription, call rtcpeerconnection.setlocaldescription(), which triggers a series of events which leads to this value being set.
...And 5 more matches

RTCPeerConnection.currentRemoteDescription - Web APIs
the read-only property rtcpeerconnection.currentremotedescription returns an rtcsessiondescription object describing the remote end of the connection as it was most recently successfully negotiated since the last time the rtcpeerconnection finished negotiating and connecting to a remote peer.
... also included is a list of any ice candidates that may already have been generated by the ice agent since the offer or answer represented by the description was first instantiated.
... to change the currentremotedescription, call rtcpeerconnection.setremotedescription(), which triggers a series of events which leads to this value being set.
...And 5 more matches

ReadableStream.pipeThrough() - Web APIs
the pipethrough() method of the readablestream interface provides a chainable way of piping the current stream through a transform stream or any other writable/readable pair.
... piping a stream will generally lock it for the duration of the pipe, preventing other readers from locking it.
... syntax var transformedstream = readablestream.pipethrough(transformstream[, options]); parameters transformstream a transformstream (or an object with the structure {writable, readable}) consisting of a readable stream and a writable stream working together to transform some data from one form to another.
...And 5 more matches

ReadableStream.pipeTo() - Web APIs
the pipeto() method of the readablestream interface pipes the current readablestream to a given writablestream and returns a promise that fulfills when the piping process completes successfully, or rejects if any errors were encountered.
... piping a stream will generally lock it for the duration of the pipe, preventing other readers from locking it.
... syntax var promise = readablestream.pipeto(destination[, options]); parameters destination a writablestream that acts as the final destination for the readablestream.
...And 5 more matches

SVGEllipseElement - Web APIs
the svgellipseelement interface provides access to the properties of <ellipse> elements.
...ill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="171" y="94" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svggeometryelement</text></a><polyline points="81,89 71,84 71,94 81,89" stroke="#d4dde4" fill="none"/><line x1="71" y1="89" x2="41" y2="89" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgellipseelement" target="_top"><rect x="-129" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="-44" y="94" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgellipseelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this i...
... svgellipseelement.cx read only this property returns a svganimatedlength reflecting the cx attribute of the given <ellipse> element.
...And 5 more matches

Keyboard-navigable JavaScript widgets - Accessibility
overview web applications often use javascript to mimic desktop widgets such as menus, tree views, rich text fields, and tab panels.
...this document describes techniques to make javascript widgets accessible with the keyboard.
...when set to 0, the element becomes focusable by keyboard and script.
...And 5 more matches

background-clip - CSS: Cascading Style Sheets
the background-clip css property sets whether an element's background extends underneath its border box, padding box, or content box.
... note: because the root element has a different background painting area, the background-clip property has no effect when specified on it.
... syntax /* keyword values */ background-clip: border-box; background-clip: padding-box; background-clip: content-box; background-clip: text; /* global values */ background-clip: inherit; background-clip: initial; background-clip: unset; values border-box the background extends to the outside edge of the border (but underneath the border in z-ordering).
...And 5 more matches

Text formatting - JavaScript
« previousnext » this chapter introduces how to work with strings and text in javascript.
... strings javascript's string type is used to represent textual data.
... '\u00a9' // "©" unicode code point escapes new in ecmascript 2015.
...And 5 more matches

Function.prototype.bind() - JavaScript
description the bind() function creates a new bound function, which is an exotic function object (a term from ecmascript 2015) that wraps the original function object.
... // does not work with `new (funca.bind(thisarg, args))` if (!function.prototype.bind) (function(){ var slice = array.prototype.slice; function.prototype.bind = function() { var thatfunc = this, thatarg = arguments[0]; var args = slice.call(arguments, 1); if (typeof thatfunc !== 'function') { // closest thing possible to the ecmascript 5 // internal iscallable function throw new typeerror('function.prototype.bind - ' + 'what is trying to be bound is not callable'); } return function(){ var funcargs = args.concat(slice.call(arguments)) return thatfunc.apply(thatarg, funcargs); }; }; })(); you can partially work around this by inserting the following code at the beginning of yo...
...ur scripts, allowing use of much of the functionality of bind() in implementations that do not natively support it.
...And 5 more matches

Intl - JavaScript
the intl object is the namespace for the ecmascript internationalization api, which provides language sensitive string comparison, number formatting, and date and time formatting.
... intl.displaynames() constructor for objects that enable the consistent translation of language, region and script display names.
... multiple locales may be specified (and a best-supported locale determined by evaluating each of them in order and comparing against the locales supported by the implementation) by passing an array (or array-like object, with a length property and corresponding indexed elements) whose elements are either intl.locale objects or values that convert to unicode bcp 47 locale identifier strings.
...And 5 more matches

JSON.parse() - JavaScript
the json.parse() method parses a json string, constructing the javascript value or object described by the string.
...see the json object for a description of json syntax.
...three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[ee][+\-]?\d+)?/g; var rx_four = /(?:^|:|,)(?:\s*\[)+/g; var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g; json.parse = function(text, reviver) { // the parse method takes a text and an optional reviver function, and returns // a javascript value if the text is a valid json text.
...And 5 more matches

Object.prototype.__proto__ - JavaScript
warning: changing the [[prototype]] of an object is, by the nature of how modern javascript engines optimize property accesses, a very slow operation, in every browser and javascript engine.
... warning: while object.prototype.__proto__ is supported today in most browsers, its existence and exact behavior has only been standardized in the ecmascript 2015 specification as a legacy feature to ensure compatibility for web browsers.
...it was never originally included in the ecmascript language spec, but modern browsers implemented it anyway.
...And 5 more matches

typeof - JavaScript
description the following table summarizes the possible return values of typeof.
... for more information about types and primitives, see also the javascript data structure page.
... type result undefined "undefined" null "object" (see below) boolean "boolean" number "number" bigint (new in ecmascript 2020) "bigint" string "string" symbol (new in ecmascript 2015) "symbol" function object (implements [[call]] in ecma-262 terms) "function" any other object "object" note: ecmascript 2019 and older permitted implementations to have typeof return any implementation-defined string value for non-callable non-standard exotic objects.
...And 5 more matches

Expressions and operators - JavaScript
this chapter documents all the javascript language operators, expressions and keywords.
... primary expressions basic keywords and general expressions in javascript.
... ...obj spread syntax allows an expression to be expanded in places where multiple arguments (for function calls) or multiple elements (for array literals) are expected.
...And 5 more matches

export - JavaScript
the export statement is used when creating javascript modules to export live bindings to functions, objects, or primitive values from the module so they can be used by other programs with the import statement.
...the export statement cannot be used in embedded scripts.
...assignments with renaming export const { name1, name2: bar } = o; // default exports export default expression; export default function (…) { … } // also class, function* export default function name1(…) { … } // also class, function* export { name1 as default, … }; // aggregating modules export * from …; // does not set the default export export * as name1 from …; // draft ecmascript® 2o21 export { name1, name2, …, namen } from …; export { import1 as name1, import2 as name2, …, namen } from …; export { default } from …; namen identifier to be exported (so that it can be imported via import in another script).
...And 5 more matches

import - JavaScript
the import statement cannot be used in embedded scripts unless such script has a type="module".
... there is also a function-like dynamic import(), which does not require scripts of type="module".
... backward compatibility can be ensured using attribute nomodule on the <script> tag.
...And 5 more matches

throw - JavaScript
description use the throw statement to throw an exception.
...zip code.
... if the zip code uses an invalid format, the throw statement throws an exception by creating an object of type zipcodeformatexception.
...And 5 more matches

Statements and declarations - JavaScript
javascript applications consist of statements with an appropriate syntax.
... a single statement may span multiple lines.
... multiple statements may occur on a single line if each statement is separated by a semicolon.
...And 5 more matches

Template literals (Template strings) - JavaScript
syntax `string text` `string text line 1 string text line 2` `string text ${expression} string text` tag`string text ${expression} string text` description template literals are enclosed by the backtick (` `) (grave accent) character instead of double or single quotes.
...in that case, the tag expression (usually a function) gets called with the template literal, which you can then manipulate before outputting.
... the tag function can then perform whatever operations on these arguments you wish, and return the manipulated string.
...And 5 more matches

Trailing commas - JavaScript
trailing commas (sometimes called "final commas") can be useful when adding new elements, parameters, or properties to javascript code.
... javascript has allowed trailing commas in array literals since the beginning, and later added them to object literals (ecmascript 5) and most recently (ecmascript 2017) to function parameters.
... syntax , examples trailing commas in literals arrays javascript ignores trailing commas in arrays: var arr = [ 1, 2, 3, ]; arr; // [1, 2, 3] arr.length; // 3 if more than one trailing comma is used, an elision (or hole) is produced.
...And 5 more matches

clip-rule - SVG: Scalable Vector Graphics
« svg attribute reference home the clip-rule attribute only applies to graphics elements that are contained within a <clippath> element.
... the clip-rule attribute basically works as the fill-rule attribute, except that it applies to <clippath> definitions.
... the following fragment of code will cause an evenodd clipping rule to be applied to the clipping path because clip-rule is specified on the <path> element that defines the clipping shape: <g> <clippath id="myclip"> <path d="..." clip-rule="evenodd" /> </clippath> <rect clip-path="url(#myclip)" ...
...And 5 more matches

<script> - SVG: Scalable Vector Graphics
the svg script element allows to add scripts to an svg document.
... while svg's script element is equivalent to the html <script> element, it has some discrepancies, like it uses the href attribute instead of src and it doesn't support ecmascript modules so far (see browser compatibility below for details) html,body,svg { height:100% } <svg viewbox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"> <script> // <![cdata[ window.addeventlistener('domcontentloaded', () => { function getcolor () { const r = math.round(math.random() * 255).tostring(16).padstart(2,'0') const g = math.round(math.random() * 255).tostring(16).padstart(2,'0') const b = math.round(math.random() * 255).tostring(16).padstart(2,'0') return `#${r}${g}${b}` } document.queryselector('circle').addeventlistener('click', (e) => { e.target.sty...
...le.fill = getcolor() }) }) // ]]> </script> <circle cx="5" cy="5" r="4" /> </svg> attributes crossorigin this attribute defines cors settings as define for the html <script> element.
...And 5 more matches

Forms related code snippets - Archive of obsolete content
here are some <form> related code snippets.
... date picker (before implementing it in a working environment, please read the note about the const statement compatibility) <!doctype html> <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>datepicker example - mdn</title> <script type="text/javascript"> /*\ |*| |*| datepicker example mdndeveloper network |*| |*| https://developer.mozilla.org/docs/code_snippets/forms |*| https://developer.mozilla.org/user:fusionchess |*| |*| this snippet is released under the gnu public license, version 3 or later.
...document.attachevent("onmousedown", ondocclick) : (document.onmousedown = ondocclick); })(); </script> <style type="text/css"> table.zdp-calendar { border: 1px solid #666666; border-collapse: collapse; background-color: #cccccc; cursor: default; font-family: verdana; font-size: 12px; } table.zdp-calendar th { border: 1px solid #666666; font-weight: bold; background-color: #ff6666; } table.zdp-calendar td { border: 1px solid #666666; text-align: center; } table.zdp-calend...
...And 4 more matches

JavaScript Debugger Service - Archive of obsolete content
in firefox versions prior to gecko 33 (firefox 33 / thunderbird 33 / seamonkey 2.30), the javascript debugger service (or simply jsd) used to be an xpcom component that allows the tracking of javascript while it was being executed in the browser.
... snippets acquiring the service we acquire the service by calling the xpcom object.
... jsd.scripthook = { onscriptcreated: function(script) { // your function here }, onscriptdestroyed: function(script) { // your function here } }; jsd.errorhook = { onerror: function(message, filename, lineno, colno, flags, errnum, exc) { // your function here } }; // triggered when jsd.errorhook[onerror] returns false jsd.debughook = { onexecute: function(frame, type, rv) { // your function here } }; jsd.enumeratescripts...
...And 4 more matches

Actionscript Acceptance Tests - Archive of obsolete content
the majority of the acceptance tests are written in actionscript and located in test/acceptance.
...the most common tests are written in actionscript and end with .as.
... support files: there are a variety of support files available for non-standard actionscript tests.
...And 4 more matches

panel.flip - Archive of obsolete content
« xul reference home flip type: string normally, when a popup opens near the edge of the screen, it flips over to open on the opposite side of the anchor, so that it doesn't extend off the screen.
... for example, if the menu doesn't have room to open downward, it flips to open upward instead; this is a vertical flip.
... horizontal flipping doesn't normally happen, since this would cause menus to open in strange places.
...And 4 more matches

description - Archive of obsolete content
the text can be set either with the value attribute or by placing text inside the open and close description tags.
...if text appears as a child of the description, it will wrap to multiple lines.
... attributes crop, disabled, tabindex value properties accessibletype, crop, disabled, tabindex, value style classes header, indent, monospace, plain, small-margin examples this is a long section of text that will word wrap when displayed <description> this is a long section of text that will word wrap when displayed.
...And 4 more matches

ECMAScript 2016 to ES.Next support in Mozilla - Archive of obsolete content
(may 2019) ecmascript next refers to new features of the ecma-262 standard (commonly referred to as javascript) introduced after ecmascript 2015.
... new versions of ecmascript specifications are released yearly.
...this year, the es2019 specification will be released and es2020 is the current ecmascript draft specification.
...And 4 more matches

Error.description - Archive of obsolete content
the error.description property returns or sets the descriptive string associated with a specific error.
... syntax object .description [= stringexpression] parameters object required.
...a string expression containing a description of the error.
...And 4 more matches

New in JavaScript 1.5 - Archive of obsolete content
the following is a changelog for javascript 1.5.
...you can compare javascript 1.5 to jscript version 5.5 and internet explorer 5.5, which was released in july 2000.
... new features in javascript 1.5 number.prototype.toexponential() number.prototype.tofixed() number.prototype.toprecision() const is now a reserved word.
...And 4 more matches

New in JavaScript 1.7 - Archive of obsolete content
the following is a changelog for javascript 1.7.
... javascript 1.7 is a language update introducing several new features, in particular generators, iterators, array comprehensions, let expressions, and destructuring assignment.
... using javascript 1.7 in order to use some of the new features of javascript 1.7, you need to specify that you wish to use javascript 1.7.
...And 4 more matches

Asynchronous JavaScript - Learn web development
in this module we take a look at asynchronous javascript, why it is important, and how it can be used to effectively handle potential blocking operations such as fetching resources from a server.
... get started prerequisites asynchronous javascript is a fairly advanced topic, and you are advised to work through javascript first steps and javascript building blocks modules before attempting this.
...if you are, then you can probably skip to the introducing asynchronous javascript module.
...And 4 more matches

JavaScript building blocks - Learn web development
in this module, we continue our coverage of all javascript's key fundamental features, turning our attention to commonly-encountered types of code blocks such as conditional statements, loops, functions, and events.
... get started prerequisites before starting this module, you should have some familiarity with the basics of html and css, and you should have also worked through our previous module, javascript first steps.
...in this article we'll explore how conditional structures work in javascript.
...And 4 more matches

Debugging JavaScript
this document is intended to help developers writing javascript code in mozilla, mainly for mozilla itself, but it may also be useful for web developers.
...this shows any javascript errors in your app, as well as any logging calls from the console api.
... browser console the browser console lets you see all javascript errors and logging in the browser, including from firefox code.
...And 4 more matches

JS_CompileFunctionForPrincipals
syntax jsfunction * js_compilefunctionforprincipals(jscontext *cx, jsobject *obj, jsprincipals *principals, const char *name, unsigned int nargs, const char **argnames, const char *body, size_t length, const char *filename, unsigned int lineno); jsfunction * js_compileucfunctionforprincipals(jscontext *cx, jsobject *obj, jsprincipals *principals, const char *name, unsigned int nargs, const char **argnames, const jschar *body, size_t length, const char *filename, unsigned int lineno); name type description ...
... principals jsprincipals * pointer to the structure holding the security information for this function.
... description js_compilefunctionforprincipals compiles a security-enabled function from a text string, bytes, and associates it with a js object, obj.
...And 4 more matches

JS_SetObjectPrincipalsFinder
set the runtime-wide object-principals-finder callback.
...syntax jsobjectprincipalsfinder js_setobjectprincipalsfinder(jsruntime *rt, jsobjectprincipalsfinder fop); name type description rt jsruntime * the runtime to configure.
... fop jsobjectprincipalsfinder the new object-principals-finder callback.
...And 4 more matches

JS_SetPrincipalsTranscoder
set the runtime-wide principals transcoder callback.
...syntax jsprincipalstranscoder js_setprincipalstranscoder(jsruntime *rt, jsprincipalstranscoder px); name type description rt jsruntime * the runtime to configure.
... px jsprincipalstranscoder the new principals transcoder.
...And 4 more matches

extIPreferenceBranch
this content covers features introduced in thunderbird 3 the extipreferencebranch interface provides simplified access to preferences.
...extipreferencebranch is defined in toolkit/components/exthelper/extiapplication.idl.
... method overview boolean has(in astring aname) extipreference get(in astring aname) nsivariant getvalue(in astring aname, in nsivariant adefaultvalue) void setvalue(in astring aname, in nsivariant avalue) void reset() attributes attribute type description root readonly attribute astring the name of the branch root.
...And 4 more matches

nsIClipboardHelper
widget/public/nsiclipboardhelper.idlscriptable the nsiclipboardhelper interface is a helper service for common uses of nsiclipboard interface.
... inherits from: nsisupports last changed in gecko 1.7 method overview void copystring(in astring astring); void copystringtoclipboard(in astring astring, in long aclipboardid); methods copystring() this method copies string to (default) clipboard.
... void copystring( in astring astring ); parameters astring the string to copy to the clipboard.
...And 4 more matches

nsIINIParser
xpcom/ds/nsiiniparser.idlscriptable an instance of nsiiniparser can be used to read values from an ini file.
... inherits from: nsisupports last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) typically, you'll create an nsiiniparser object by calling nsiiniparserfactory.createiniparser().
... also, if you need to write to an ini file, use nsiiniparserwriter.
...And 4 more matches

nsIPrintingPrompt
embedding/browser/webbrowser/nsiprintingprompt.idlscriptable this is the printing prompt interface which can be used without knowlege of a parent window.
... inherits from: nsisupports last changed in gecko 1.7 this interface is identical to nsipintingpromptservice but without the parent nsidomwindow parameter.
... see nsiprintingpromptservice for all documentation.
...And 4 more matches

nsIProxyInfo
netwerk/base/public/nsiproxyinfo.idlscriptable please add a summary to this article.
... last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) inherits from: nsisupports attributes attribute type description failoverproxy nsiproxyinfo this attribute specifies the proxy to failover to when this proxy fails.
...if a nsiproxyinfo is reported as failed via nsiprotocolproxyservice.getfailoverforproxy(), then the failed proxy will not be used again for this many seconds.
...And 4 more matches

nsIScriptableUnescapeHTML
parser/html/nsiscriptableunescapehtml.idlscriptable this interface is a utility interface that exposes the kind of markup parser behavior that the feed service needs.
... 1.0 66 introduced gecko 1.8 obsolete gecko 14.0 inherits from: nsisupports last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) note: as of firefox 14, this interface is obsolete (but still available for compatibility with legacy extensions) and all its functionality is available with more configuration options via the nsiparserutils interface.
... implemented by: @mozilla.org/feed-unescapehtml;1 as a service: var scriptableunescapehtml = components.classes["@mozilla.org/feed-unescapehtml;1"] .getservice(components.interfaces.nsiscriptableunescapehtml); method overview nsidomdocumentfragment parsefragment(in astring fragment, in prbool isxml, in nsiuri baseuri, in nsidomelement element); astring unescape(in astring src); methods parsefragment() parses a string of html or xml source into a sanitized documentfragment.
...And 4 more matches

Manipulating video using canvas - Web APIs
by combining the capabilities of the video element with a canvas, you can manipulate video data in real time to incorporate a variety of visual effects to the video being displayed.
... this tutorial demonstrates how to perform chroma-keying (also known as the "green screen effect") using javascript code.
...ft; border :1px solid #444444; padding:10px; margin: 10px; background:#3b3b3b; } </style> </head> <body> <div> <video id="video" src="media/video.mp4" controls="true" crossorigin="anonymous"/> </div> <div> <canvas id="c1" width="160" height="96"></canvas> <canvas id="c2" width="160" height="96"></canvas> </div> <script type="text/javascript" src="processor.js"></script> </body> </html> the key bits to take away from this are: this document establishes two canvas elements, with the ids c1 and c2.
...And 4 more matches

ClipboardItem() - Web APIs
the clipboarditem() constructor of the clipboard api creates a new clipboarditem object which represents data to be stored or retrieved via the clipboard api, that is clipboard.write() and clipboard.read() respectively.
...see the browser compatibility table for the clipboard interface.
... syntax var clipboarditem = new clipboarditem(clipboarditemdata); parameters clipboarditemdata an object with the mime type as the key and blob as the value.
...And 4 more matches

Dragging and Dropping Multiple Items - Web APIs
mozilla supports the ability to drag multiple items using some additional non-standard methods.
... setting and getting with indices the mozsetdataat() method allows you to add multiple items during a dragstart event.
... common cases where dragging multiple items is used is when dragging multiple files or bookmarks.
...And 4 more matches

MSManipulationEvent - Web APIs
msmanipulationevent provides contextual information when contact is made to the screen and an element is manipulated.
... events msmanipulationstatechanged: event fires when the state of an element being manipulated has changed.
... methods msmanipulationevent.initmsmanipulationevent(): used to create a manipulation event that can be called from javascript.
...And 4 more matches

PaymentRequest.onshippingaddresschange - Web APIs
the onshippingaddresschange event of the paymentrequest interface is fired whenever the user changes their shipping address, including when an address is added by the user for the first time.
... syntax paymentrequest.addeventlistener('shippingaddresschange', shippingaddresschangeevent => { ...
... }); paymentrequest.onshippingaddresschange = function(shippingaddresschangeevent) { ...
...And 4 more matches

PaymentRequest: shippingoptionchange event - Web APIs
for payment requests that request shipping information, and for which shipping options are offered, the shippingoptionchange event is sent to the paymentrequest whenever the user chooses a shipping option from the list of available options.
... the string identifying the currently-selected shipping option can be found in the shippingoption property.
... bubbles no cancelable no interface paymentrequestupdateevent event handler property onshippingoptionchange examples this code snippet sets up a handler for the shippingoptionchange event.
...And 4 more matches

RTCPeerConnection.pendingLocalDescription - Web APIs
the read-only property rtcpeerconnection.pendinglocaldescription returns an rtcsessiondescription object describing a pending configuration change for the local end of the connection.
...use rtcpeerconnection.currentlocaldescription or rtcpeerconnection.localdescription to get the current state of the endpoint.
... for details on the difference, see pending and current descriptions in webrtc connectivity.
...And 4 more matches

RTCPeerConnection.pendingRemoteDescription - Web APIs
the read-only property rtcpeerconnection.pendingremotedescription returns an rtcsessiondescription object describing a pending configuration change for the remote end of the connection.
...use rtcpeerconnection.currentremotedescription or rtcpeerconnection.remotedescription to get the current session description for the remote endpoint.
... for details on the difference, see pending and current descriptions in webrtc connectivity.
...And 4 more matches

RTCSessionDescription.type - Web APIs
the property rtcsessiondescription.type is a read-only value of type rtcsdptype which describes the description's type.
... syntax var value = sessiondescription.type; sessiondescription.type = value; value the possible values are defined by an enum of type rtcsdptype.
... the allowed values are those of an enum of type rtcsdptype: "offer", the description is the initial proposal in an offer/answer exchange.
...And 4 more matches

ScriptProcessorNode.bufferSize - Web APIs
the buffersize property of the scriptprocessornode interface returns an integer representing both the input and output buffer size, in sample-frames.
... syntax var audioctx = new audiocontext(); var scriptnode = audioctx.createscriptprocessor(4096, 1, 1); console.log(scriptnode.buffersize); value an integer.
... example the following example shows basic usage of a scriptprocessornode to take a track loaded via audiocontext.decodeaudiodata(), process it, adding a bit of white noise to each audio sample of the input track (buffer) and play it through the audiodestinationnode.
...And 4 more matches

ScriptProcessorNode.onaudioprocess - Web APIs
the onaudioprocess event handler of the scriptprocessornode interface represents the eventhandler to be called for the audioprocess event that is dispatched to scriptprocessornode node types.
... syntax var audioctx = new audiocontext(); var scriptnode = audioctx.createscriptprocessor(4096, 1, 1); scriptnode.onaudioprocess = function() { ...
... } example the following example shows basic usage of a scriptprocessornode to take a track loaded via audiocontext.decodeaudiodata(), process it, adding a bit of white noise to each audio sample of the input track (buffer) and play it through the audiodestinationnode.
...And 4 more matches

ServiceWorkerGlobalScope.onpushsubscriptionchange - Web APIs
the serviceworkerglobalscope.onpushsubscriptionchange event of the serviceworkerglobalscope interface is fired to indicate a change in push subscription that was triggered outside the application's control, e.g.
... when browser refresh the push subscription.
... previously, it was defined as the event interface that is fired whenever a push subscription has been invalidated (or is about to become so).
...And 4 more matches

WebGLRenderingContext.generateMipmap() - Web APIs
the webglrenderingcontext.generatemipmap() method of the webgl api generates a set of mipmaps for a webgltexture object.
... mipmaps are used to create distance with objects.
... a higher-resolution mipmap is used for objects that are closer, and a lower-resolution mipmap is used for objects that are farther away.
...And 4 more matches

<sub>: The Subscript element - HTML: Hypertext Markup Language
the html subscript element (<sub>) specifies inline text which should be displayed as subscript for solely typographical reasons.
... subscripts are typically rendered with a lowered baseline using smaller text.
... marking up the subscript in mathematical variable numbers (although you may also consider using a mathml formula for this).
...And 4 more matches

Meta programming - JavaScript
« previousnext » starting with ecmascript 2015, javascript gains support for the proxy and reflect objects allowing you to intercept and define custom behavior for fundamental language operations (e.g.
...with the help of these two objects you are able to program at the meta level of javascript.
... proxies introduced in ecmascript 6, proxy objects allow you to intercept certain operations and to implement custom behaviors.
...And 4 more matches

Using Promises - JavaScript
guarantees unlike old-fashioned passed-in callbacks, a promise comes with some guarantees: callbacks will never be called before the completion of the current run of the javascript event loop.
... multiple callbacks may be added by calling then() several times.
...this is very much modeled after how synchronous code works: try { const result = syncdosomething(); const newresult = syncdosomethingelse(result); const finalresult = syncdothirdthing(newresult); console.log(`got the final result: ${finalresult}`); } catch(error) { failurecallback(error); } this symmetry with asynchronous code culminates in the async/await syntactic sugar in ecmascript 2017: async function foo() { try { const result = await dosomething(); const newresult = await dosomethingelse(result); const finalresult = await dothirdthing(newresult); console.log(`got the final result: ${finalresult}`); } catch(error) { failurecallback(error); } } it builds on promises, e.g.
...And 4 more matches

SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead - JavaScript
the javascript warning "using //@ to indicate sourceurl pragmas is deprecated.
... use //# instead" occurs when there is a deprecated source map syntax in a javascript source.
...javascript execution won't be halted.
...And 4 more matches

Default parameters - JavaScript
syntax function [name]([param1[ = defaultvalue1 ][, ..., paramn[ = defaultvaluen ]]]) { statements } description in javascript, function parameters default to undefined.
... in the following example, if no value is provided for b when multiply is called, b's value would be undefined when evaluating a * b and multiply would return nan.
... function multiply(a, b) { return a * b } multiply(5, 2) // 10 multiply(5) // nan !
...And 4 more matches

Array.prototype.forEach() - JavaScript
description foreach() calls a provided callback function once for each element in an array in ascending order.
...using shift()) during the iteration, later elements will be skipped.
... the following code logs a line for each element in an array: function logarrayelements(element, index, array) { console.log('a[' + index + '] = ' + element) } // notice that index 2 is skipped, since there is no item at // that position in the array...
...And 4 more matches

Date.parse() - JavaScript
description the parse() method takes a date string (such as "2011-10-10t14:48:00") and returns the number of milliseconds since january 1, 1970, 00:00:00 utc.
...(see the section date time string format in the ecmascript specification for more details.) for example, "2011-10-10" (date-only form), "2011-10-10t14:48:00" (date-time form), or "2011-10-10t14:48:00.000+09:00" (date-time form with milliseconds and time zone) can be passed and will be parsed.
... the ecmascript specification states: if the string does not conform to the standard format the function may fall back to any implementation–specific heuristics or implementation–specific parsing algorithm.
...And 4 more matches

Date - JavaScript
javascript date objects represent a single moment in time in a platform-independent format.
... description the ecmascript epoch and timestamps a javascript date is fundamentally specified as the number of milliseconds that have elapsed since midnight on january 1, 1970, utc.
... in addition to methods to read and alter individual components of the local date and time (such as getday() and sethours()), there are also versions of the same methods that read and manipulate the date and time using utc (such as getutcday() and setutchours()).
...And 4 more matches

Error - JavaScript
description runtime errors result in new error objects being created and thrown.
... error types besides the generic error constructor, there are seven other core error constructors in javascript.
... internalerror creates an instance representing an error that occurs when an internal error in the javascript engine is thrown.
...And 4 more matches

Function.prototype.apply() - JavaScript
starting with ecmascript 5 these arguments can be a generic array-like object instead of an array.
... description note: while the syntax of this function is almost identical to that of call(), the fundamental difference is that call() accepts an argument list, while apply() accepts a single array of arguments.
... since ecmascript 5th edition, you can also use any kind of object which is array-like.
...And 4 more matches

Intl.Locale.prototype.maximize() - JavaScript
the intl.locale.prototype.maximize() method gets the most likely values for the language, script, and region of the locale based on existing values.
... description sometimes, it is convenient to be able to identify the most likely locale language identifier subtags based on an incomplete langauage id.
...for instance, given the language id "en", the algorithm would return "en-latn-us", since english can only be written in the latin script, and is most likely to be used in the united states, as it is the largest english-speaking country in the world.
...And 4 more matches

Intl.Locale - JavaScript
description the intl.locale object was created to allow for easier manipulation of unicode locales.
...language identifiers are the core of the locale, consisting of language, script, and region subtags.
...adding a locale class, however, adds ease of parsing and manipulating the language, script, and region, as well as extension tags.
...And 4 more matches

JSON.stringify() - JavaScript
the json.stringify() method converts a javascript object or value to a json string, optionally replacing values if a replacer function is specified or optionally including only the specified properties if a replacer array is specified.
... description json.stringify() converts a value to json notation representing it: if the value has a tojson() method, it's responsible to define what data will be serialized.
... issue with plain json.stringify for use as javascript historically, json was not a completely strict subset of javascript.
...And 4 more matches

Math - JavaScript
description unlike many other global objects, math is not a constructor.
...constants are defined with the full precision of real numbers in javascript.
...even the same javascript engine on a different os or architecture can give different results!
...And 4 more matches

handler.defineProperty() - JavaScript
syntax const p = new proxy(target, { defineproperty: function(target, property, descriptor) { } }); parameters the following parameters are passed to the defineproperty() method.
... property the name or symbol of the property whose description is to be retrieved.
... descriptor the descriptor for the property being defined or modified.
...And 4 more matches

Proxy - JavaScript
description a proxy is created with two parameters: target: the original object which you want to proxy handler: an object that defines which operations will be intercepted and how to redefine intercepted operations.
... obj[prop] : 37; } }; const p = new proxy({}, handler); p.a = 1; p.b = undefined; console.log(p.a, p.b); // 1, undefined console.log('c' in p, p.c); // false, 37 no-op forwarding proxy in this example, we are using a native javascript object to which our proxy will forward all operations that are applied to it.
... const target = {}; const p = new proxy(target, {}); p.a = 37; // operation forwarded to the target console.log(target.a); // 37 // (the operation has been properly forwarded!) note that while this "no-op" works for javascript objects, it does not work for native browser objects like dom elements.
...And 4 more matches

isNaN() - JavaScript
note, coercion inside the isnan function has interesting rules; you may alternatively want to use number.isnan(), as defined in ecmascript 2015.
... description the necessity of an isnan function unlike all other possible values in javascript, it is not possible to rely on the equality operators (== and ===) to determine whether a value is nan or not, because both nan == nan and nan === nan evaluate to false.
...the function should be interpreted as answering the question, "is this value, when coerced to a numeric value, an ieee-754 'not a number' value?" ecmascript 2015 contains the number.isnan() function.
...And 4 more matches

Destructuring assignment - JavaScript
the destructuring assignment syntax is a javascript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables.
...g(a); // 10 console.log(b); // 20 [a, b, ...rest] = [10, 20, 30, 40, 50]; console.log(a); // 10 console.log(b); // 20 console.log(rest); // [30, 40, 50] ({ a, b } = { a: 10, b: 20 }); console.log(a); // 10 console.log(b); // 20 // stage 4(finished) proposal ({a, b, ...rest} = {a: 10, b: 20, c: 30, d: 40}); console.log(a); // 10 console.log(b); // 20 console.log(rest); // {c: 30, d: 40} description the object and array literal expressions provide an easy way to create ad hoc packages of data.
... function parseprotocol(url) { const parsedurl = /^(\w+)\:\/\/([^\/]+)\/(.*)$/.exec(url); if (!parsedurl) { return false; } console.log(parsedurl); // ["https://developer.mozilla.org/web/javascript", "https", "developer.mozilla.org", "en-us/web/javascript"] const [, protocol, fullhost, fullpath] = parsedurl; return protocol; } console.log(parseprotocol('https://developer.mozilla.org/web/javascript')); // "https" object destructuring basic assignment const user = { id: 42, is_verified: true }; const {id, is_verified} = user; console.log(id); // 42 console.log(is_ve...
...And 4 more matches

Property accessors - JavaScript
syntax object.property object['property'] description one can think of an object as an associative array (a.k.a.
... dot notation in the object.property syntax, the property must be a valid javascript identifier.
... (in the ecmascript standard, the names of properties are technically "identifiernames", not "identifiers", so reserved words can be used but are not recommended).
...And 4 more matches

Spread syntax (...) - JavaScript
syntax for function calls: myfunction(...iterableobj); for array literals or strings: [...iterableobj, '4', 'five', 6]; for object literals (new in ecmascript 2018): let objclone = { ...obj }; rest syntax (parameters) rest syntax looks exactly like spread syntax.
...spread syntax "expands" an array into its elements, while rest syntax collects multiple elements and "condenses" them into a single element.
... function myfunction(x, y, z) { } const args = [0, 1, 2]; myfunction.apply(null, args); with spread syntax the above can be written as: function myfunction(x, y, z) { } const args = [0, 1, 2]; myfunction(...args); any argument in the argument list can use spread syntax, and the spread syntax can be used multiple times.
...And 4 more matches

label - JavaScript
syntax label : statement label any javascript identifier that is not a reserved word.
... statement a javascript statement.
... description you can use a label to identify a loop, and then use the break or continue statements to indicate whether a program should interrupt the loop or continue its execution.
...And 4 more matches

var - JavaScript
description var declarations, wherever they occur, are processed before any code is executed.
...this means its property descriptor cannot be changed and it cannot be deleted using delete.
...javascript has automatic memory management, and it would make no sense to be able to use the delete operator on a global variable.
...And 4 more matches

CSS and JavaScript animation performance - Web Performance
there are many ways to implement web animations, such as css transitions/animations or javascript-based animations (using requestanimationframe()).
... in this article, we analyse the performance differences between css- and javascript-based animation.
... requestanimationframe the requestanimationframe() api provides an efficient way to make animations in javascript.
...And 4 more matches

clipPathUnits - SVG: Scalable Vector Graphics
the clippathunits attribute indicates which coordinate system to use for the contents of the <clippath> element.
... only one element is using this attribute: <clippath> html,body,svg { height:100% } <svg viewbox="0 0 100 100"> <clippath id="myclip1" clippathunits="userspaceonuse"> <circle cx="50" cy="50" r="35" /> </clippath> <clippath id="myclip2" clippathunits="objectboundingbox"> <circle cx=".5" cy=".5" r=".35" /> </clippath> <!-- some reference rect to materialized to clip path --> <rect id="r1" x="0" y="0" width="45" height="45" /> <rect id="r2" x="0" y="55" width="45" height="45" /> <rect id="r3" x="55" y="55" width="45" height="45" /> <rect id="r4" x="55" y="0" width="45" height="45" /> <!-- the first 3 rect are clipped with usespaceonuse units --> <use clip-path="url(#myclip1)" xlink:href="#r1" fill="red" /> <use clip-path="url(#myclip1)" xlink:href="#...
...r2" fill="red" /> <use clip-path="url(#myclip1)" xlink:href="#r3" fill="red" /> <!-- the last rect is clipped with objectboundingbox units --> <use clip-path="url(#myclip2)" xlink:href="#r4" fill="red" /> </svg> clippath for <clippath>, clippathunits define the coordinate system in use for the content of the element.
...And 4 more matches

Clipping and masking - SVG: Scalable Vector Graphics
clipping refers to removing parts of elements defined by other parts.
... creating clips we create the above mentioned semicircle based on a circle element: <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <clippath id="cut-off-bottom"> <rect x="0" y="0" width="200" height="100" /> </clippath> </defs> <circle cx="100" cy="100" r="100" clip-path="url(#cut-off-bottom)" /> </svg> centered at (100,100) a circle with radius 100 is painted.
... the attribute clip-path references a <clippath> element with a single rect element.
...And 4 more matches

Introduction to using XPath in JavaScript - XPath
this document describes the interface for using xpath in javascript internally, in extensions, and from websites.
... numbervalue stringvalue booleanvalue example the following uses the xpath expression count(//p) to obtain the number of <p> elements in an html document: var paragraphcount = document.evaluate( 'count(//p)', document, null, xpathresult.any_type, null ); alert( 'this document contains ' + paragraphcount.numbervalue + ' paragraph elements' ); although javascript allows us to convert the number to a string for display, the xpath interface will not automatically convert the numerical result if the stringvalue property is requested, so the following code will not work: var paragraphcount = document.evaluate('count(//p)', document, null, xpathresult.any_type, null ); alert( 'this document contains ' + paragraphcount.stringvalue + ' paragraph elements' ); ...
... node-set types the xpathresult object allows node-sets to be returned in 3 principal different types: iterators snapshots first nodes iterators when the specified result type in the resulttype parameter is either: unordered_node_iterator_type ordered_node_iterator_type the xpathresult object returned is a node-set of matched nodes which will behave as an iterator, allowing us to access the individual nodes contained by using the iteratenext() method of the xpathresult.
...And 4 more matches

Scripting - Archive of obsolete content
the web application bundle is allowed to hold a javascript file named webapp.js (called the webapp script).
...the platform property implements the nsiplatformglue interface, whose methods are described in the following section.
...the following code can be used by web content to determine whether it is running in prism: if ("platform" in window) { // prism-specific code goes here } see the nsiplatformglue idl definition file for details of the methods available to prism apps.
...And 3 more matches

NP_GetMIMEDescription - Archive of obsolete content
np_getmimedescription returns a supported mime type list for your plugin.
... each mime type description should be separated by a semicolon (;).
... each mime type description contains the mime type, an extensions list and a short description.
...And 3 more matches

ECMAScript 2015 support in Mozilla - Archive of obsolete content
ecmascript 2015 is the sixth edition of the ecmascript language specification standard.
... it defines the standard for the javascript implementation in spidermonkey, the engine used in firefox and other mozilla applications.
... code-named "es.next", "harmony", or "ecmascript 6", the first working draft (based on ecmascript 5.1) was published on july 12, 2011 as "es.next".
...And 3 more matches

Server-Side JavaScript - Archive of obsolete content
sounds obvious, but for at least the first twelve years of the web's evolution, developers have pretty much had to use different languages on the server from those available in the browser, leading to segregated teams, disparate and inconsistent know-how, and plenty of server-side string manipulation gymnastics to generate html or ajax pages.
... the simplicity of using javascript on the server was part of netscape's original vision back in the day with netscape livewire.
...today with computing cycles having increased more than 10-fold and mozilla's work on rhino (javascript interpreter in java) and spidermonkey (javascript interpreter in c) and javascript itself, we have very solid foundations for javascript to be extraordinarily useful and applicable on the server-side again -- with performance in the same range as popular server-side environments like php and ruby on rails.
...And 3 more matches

Describing microformats in JavaScript - Archive of obsolete content
microformats are described in javascript by using a standardized structure format that has several standard members that describe the object.
... mfobject the javascript object that implements the microformat.
...standard attributes are: plural a boolean value indicating that, if true indicates that the property can have multiple values.
...And 3 more matches

Async scripts for asm.js - Game development
every medium or large game should compile asm.js code as part of an async script to give the browser the maximum flexibility to optimize the compilation process.
... in gecko, async compilation allows the javascript engine to compile the asm.js off the main thread when the game is loading and cache the generated machine code so that the game doesn't need to be compiled on subsequent loads (starting in firefox 28).
... to see the difference, toggle javascript.options.parallel_parsing in about:config.
...And 3 more matches

About Scriptable Interfaces - Interfaces
most of the information of this document is based on http://www.mozilla.org/scriptable/ and creating xpcom components scriptable interfaces interfaces allow xpcom components to expose their functionality to the outside world while hiding the inner details of the component implementation.
... interfaces are written in an interface description language.
... when we label an interface as scriptable, we're saying that components exporting this interface can be referenced (through this interface) from scripts (e.g javascript), and that we can write new components implementing the interface using script languages.
...And 3 more matches

Multiprocess on Windows
on the other hand, com's multithreaded apartment (mta) uses a much faster ipc mechanism that does not suffer from the same problems as the message queue.
... this code lives in the mscom library, located in the tree at /ipc/mscom.
...both metadata types must be shipped with firefox.
...And 3 more matches

overflow-clip-box
the overflow-clip-box css property specifies relative to which box the clipping happens when there is an overflow.
... it is short hand for the overflow-clip-box-inline and overflow-clip-box-block properties.
... /* keyword values */ overflow-clip-box: padding-box; overflow-clip-box: content-box; /* two values */ overflow-clip-box: padding-box content-box; overflow-clip-box: content-box content-box; /* global values */ overflow-clip-box: inherit; overflow-clip-box: initial; overflow-clip-box: unset; note: on gecko, by default, padding-box is used everywhere, but <input type="text"> and similar use the value content-box.
...And 3 more matches

javascript.options.strict
javascript warnings are generated when code is executed that doesn't cause a run-time error, but is non-standard, poorly written, or prone to cause logic errors.
... this preference controls whether javascript warnings are logged to the javascript console.
... example : <html> <head> <title>sample</title> </head> <body> <label id="name">enter you first name</label> <p id ="sample"></p> <script> "use strict" name1= "john" ; // this will cause and an error as variable not declared .
...And 3 more matches

JS_GetOwnPropertyDescriptor
get a detailed description of that property.
... syntax bool js_getownpropertydescriptor(jscontext *cx, js::handleobject obj, const char *name, js::mutablehandle<jspropertydescriptor> desc); bool js_getownpropertydescriptorbyid(jscontext *cx, js::handleobject obj, js::handleid id, js::mutablehandle<jspropertydescriptor> desc); bool js_getownucpropertydescriptor(jscontext *cx, js::handleobject obj, const char16_t *name, js::mutablehandle desc); // added in spidermonkey 45 name type description cx jscontext * a context.
... desc js::mutablehandle&lt;jspropertydescriptor&gt; out parameter.
...And 3 more matches

JS_GetPropertyDescriptor
finds a specified property of an object and gets a detailed description of that property.
... syntax bool js_getpropertydescriptor(jscontext *cx, js::handleobject obj, const char *name, js::mutablehandle<jspropertydescriptor> desc); // added in spidermonkey 31 bool js_getpropertydescriptorbyid(jscontext *cx, js::handleobject obj, js::handleid id, js::mutablehandle<jspropertydescriptor> desc); name type description cx jscontext * a context.
... desc js::mutablehandle&lt;jspropertydescriptor&gt; out parameter.
...And 3 more matches

nsIPermission
the nsipermission interface defines a "permission" object, which is used to allow or block objects (for example cookies, images) from certain sites based on user preferences.
... netwerk/base/public/nsipermission.idlscriptable please add a summary to this article.
... last changed in gecko 2 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) inherits from: nsisupports attributes attribute type description capability pruint32 the permission to set: allow, deny, or unknown (which is the default).
...And 3 more matches

nsIPlacesImportExportService
toolkit/components/places/nsiplacesimportexportservice.idlscriptable provides methods for exporting places data.
... 1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 14.0 (firefox 14.0 / thunderbird 14.0 / seamonkey 2.11) in the past, this interface also offered methods for importing places data, but those methods are now part of the bookmarkhtmlutils.jsm javascript code module.
... implemented by: @mozilla.org/import-export-service;1 as a service: var placesimportexportservice = components.classes["@mozilla.org/import-export-service;1"] .getservice(components.interfaces.nsiplacesimportexportservice); method overview void backupbookmarksfile(); void exporthtmltofile(in nsilocalfile afile); void importhtmlfromfile(in nsilocalfile afile, in boolean aisinitialimport); obsolete since gecko 14.0 void importhtmlfromfiletofolder(in nsilocalfile afile, in print64 afolder, in boolean aisinitialimport); obsolete since gecko 14.0 void importhtmlfromuri(in nsiuri auri, in boolean aisinitialimport); obsolete...
...And 3 more matches

nsIProcess2
xpcom/threads/nsiprocess.idlscriptable this interface represents an executable process.
... this expands upon the nsiprocess interface.
... 1.0 66 introduced gecko 1.9.1 obsolete gecko 1.9.2 inherits from: nsiprocess last changed in gecko 1.9.1 (firefox 3.5 / thunderbird 3.0 / seamonkey 2.0) gecko 1.9.2 note this interface was removed in gecko 1.9.2 and its method added to nsiprocess.
...And 3 more matches

nsIPrompt
netwerk/base/public/nsiprompt.idlscriptable this is the prompt interface which can be used without knowledge of a parent window.
... inherits from: nsisupports last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) note: this interface is identical to nsipromptservice but without the parent nsidomwindow parameter.
... to avoid redundancy, all methods here link to nsipromptservice.
...And 3 more matches

nsIProtocolProxyFilter
netwerk/base/public/nsiprotocolproxyfilter.idlscriptable this interface is used to apply filters to the proxies selected for a given uri.
...use nsiprotocolproxyservice.registerfilter() to hook up instances of this interface.
... method overview nsiproxyinfo applyfilter(in nsiprotocolproxyservice aproxyservice, in nsiuri auri, in nsiproxyinfo aproxy); methods applyfilter() this method is called to apply proxy filter rules for the given uri and proxy object (or list of proxy objects).
...And 3 more matches

nsIWebPageDescriptor
docshell/base/nsiwebpagedescriptor.idlscriptable this interface allows content being displayed in one window to be loaded into another window without refetching it from the network.
... inherits from: nsisupports last changed in gecko 1.7 method overview void loadpage(in nsisupports apagedescriptor, in unsigned long adisplaytype); attributes attribute type description currentdescriptor nsisupports retrieves the page descriptor for the current document.
... constants display type constants constant value description display_as_source 0x0001 generates an optionally syntax-highlighted (for xml/html documents) source of the original page.
...And 3 more matches

nsIXPCScriptable
implementations may skip writing to *_retval unless they want to return pr_false.
... js/src/xpconnect/idl/nsixpcscriptable.idlnot scriptable please add a summary to this article.
...ectwrappednative wrapper, in jscontextptr cx, in jsobjectptr obj, in jsval val); jsobjectptr outerobject(in nsixpconnectwrappednative wrapper, in jscontextptr cx, in jsobjectptr obj); jsobjectptr innerobject(in nsixpconnectwrappednative wrapper, in jscontextptr cx, in jsobjectptr obj); void postcreateprototype(in jscontextptr cx, in jsobjectptr proto); attributes attribute type description classname string scriptableflags pruint32 the bitwise or'd set of flags (define below) that indicate the behavior of this object.
...And 3 more matches

XPCOM ownership guidelines
that's a sure sign of ownership.
... if you create an object with a longer lifespan, you will own it until you give ownership away.
... such a function is the perfect example of something that creates an object with a longer lifespan that itself, and gives away ownership (by producing a pointer that is already addrefed) --- in this case, to the caller.
...And 3 more matches

AudioParamDescriptor - Web APIs
the audioparamdescriptor dictionary of the web audio api specifies properties for an audioparam objects.
...if the underlying audioworkletprocessor has a parameterdescriptors static getter, then the returned array of objects based on this dictionary is used internally by audioworkletnode constructor to populate its parameters property accordingly.
... we expand the processor by adding a static parameterdescriptors getter.
...And 3 more matches

AudioWorkletProcessor.parameterDescriptors (static getter) - Web APIs
the read-only parameterdescriptors property of an audioworkletprocessor-derived class is a static getter, which returns an iterable of audioparamdescriptor-based objects.
... syntax audioworkletprocessorsubclass.parameterdescriptors; value an iterable of audioparamdescriptor-based objects.
... we expand the processor by adding a static parameterdescriptors getter.
...And 3 more matches

ClipboardEvent() - Web APIs
the clipboardevent() constructor returns a newly created clipboardevent, representing an event providing information related to modification of the clipboard, that is cut, copy, and paste events.
... syntax var clipboardevent = new clipboardevent(type[, options]); parameters the clipboardevent() constructor also inherits arguments from event().
... type is a domstring representing the name of the type of the clipboardevent.
...And 3 more matches

ClipboardItem.getType() - Web APIs
the gettype() method of the clipboarditem interface returns a promise that resolves with a blob of the requested mime type or an error if the mime type is not found.
... syntax var blob = clipboarditem.gettype(type); parameters type a valid mime type.
... typeerror no parameter is specified or the type is not that of the clipboarditem.
...And 3 more matches

PaymentRequest: shippingaddresschange event - Web APIs
the shippingaddresschange event is sent to the paymentrequest object when the user selects a shipping address or changes details of their shipping address.
... bubbles no cancelable no interface paymentrequestupdateevent event handler property onshippingaddresschange usage notes depending on the browser, the shipping address information may be redacted for privacy reasons.
... that is, the paymentaddress which contains the shipping address may have some portions of its content altered, obscured, or left out entirely in order to prevent identifying the user without their consent (since if they choose to have you ship products to them, you'll need their address).
...And 3 more matches

RTCPeerConnection.remoteDescription - Web APIs
the read-only property rtcpeerconnection.remotedescription returns a rtcsessiondescription describing the session (which includes configuration and media information) for the remote end of the connection.
... the returned value typically reflects a remote description which has been received over the signaling server (as either an offer or an answer) and then put into effect by your code calling rtcpeerconnection.setremotedescription() in response.
... syntax var sessiondescription = peerconnection.remotedescription; on a more fundamental level, the returned value is the value of rtcpeerconnection.pendingremotedescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentremotedescription is returned.
...And 3 more matches

SVGScriptElement - Web APIs
the svgscriptelement interface corresponds to the svg <script> element.
...co,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgscriptelement" target="_top"><rect x="321" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgscriptelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties svgscri...
...ptelement.type read only a domstring corresponding to the type attribute of the given <script> element.
...And 3 more matches

ServiceWorkerGlobalScope.skipWaiting() - Web APIs
the serviceworkerglobalscope.skipwaiting() method of the serviceworkerglobalscope forces the waiting service worker to become the active service worker.
... syntax serviceworkerglobalscope.skipwaiting().then(function() { //do something }); returns a promise that immediately resolves with undefined.
... example while self.skipwaiting() can be called at any point during the service worker's execution, it will only have an effect if there's a newly installed service worker that might otherwise remain in the waiting state.
...And 3 more matches

WebGL2RenderingContext.vertexAttribIPointer() - Web APIs
the webgl2renderingcontext.vertexattribipointer() method of the webgl 2 api specifies integer data formats and locations of vertex attributes in a vertex attributes array.
... syntax void gl.vertexattribipointer(index, size, type, stride, offset); parameters index a gluint specifying the index of the vertex attribute that is to be modified.
...must be a multiple of type.
...And 3 more matches

WorkerGlobalScope.importScripts() - Web APIs
the importscripts() method of the workerglobalscope interface synchronously imports one or more scripts into the worker's scope.
... syntax self.importscripts('foo.js'); self.importscripts('foo.js', 'bar.js', ...); parameters a comma-separated list of domstring objects representing the scripts to be imported.
... exceptions networkerror imported scripts were not served with a valid javascript mime type (i.e.
...And 3 more matches

Concurrency model and the event loop - JavaScript
javascript has a concurrency model based on an event loop, which is responsible for executing the code, collecting and processing events, and executing queued sub-tasks.
...modern javascript engines implement and heavily optimize the described semantics.
... queue a javascript runtime uses a message queue, which is a list of messages to be processed.
...And 3 more matches

Warning: -file- is being assigned a //# sourceMappingURL, but already has one - JavaScript
the javascript warning "-file- is being assigned a //# sourcemappingurl, but already has one." occurs when a source map has been specified more than once for a given javascript source.
...javascript execution won't be halted.
... a source map has been specified more than once for a given javascript source.
...And 3 more matches

SyntaxError: missing ; before statement - JavaScript
the javascript exception "missing ; before statement" occurs when there is a semicolon (;) missing somewhere and can't be added by automatic semicolon insertion (asi).
... you need to provide a semicolon, so that javascript can parse the source code correctly.
...javascript statements must be terminated with semicolons.
...And 3 more matches

SyntaxError: unterminated string literal - JavaScript
the javascript error "unterminated string literal" occurs when there is an unterminated string somewhere.
...javascript makes no distinction between single-quoted strings and double-quoted strings.
...to fix this error, check if: you have opening and closing quotes (single or double) for your string literal, you have escaped your string literal correctly, your string literal isn't split across multiple lines.
...And 3 more matches

arguments.callee - JavaScript
description callee is a property of the arguments object.
... warning: the 5th edition of ecmascript (es5) forbids use of arguments.callee() in strict mode.
... (adapted from a stack overflow answer by olliej) early versions of javascript did not allow named function expressions, and for this reason you could not make a recursive function expression.
...And 3 more matches

Array.prototype.reduce() - JavaScript
if no initialvalue is supplied, the first element in the array will be used as the initial accumulator value and skipped as currentvalue.
... description the reduce() method executes the callback once for each assigned value present in the array, taking four arguments: accumulator currentvalue currentindex array the first time the callback is called, accumulator and currentvalue can be one of two values.
... note: if initialvalue is not provided, reduce() will execute the callback function starting at index 1, skipping the first index.
...And 3 more matches

Number.NEGATIVE_INFINITY - JavaScript
property attributes of number.negative_infinity writable no enumerable no configurable no description the value of number.negative_infinity is the same as the negative value of the global object's infinity property.
... this value behaves slightly differently than mathematical infinity: any positive value, including positive_infinity, multiplied by negative_infinity is negative_infinity.
... any negative value, including negative_infinity, multiplied by negative_infinity is positive_infinity.
...And 3 more matches

Number.POSITIVE_INFINITY - JavaScript
property attributes of number.positive_infinity writable no enumerable no configurable no description the value of number.positive_infinity is the same as the value of the global object's infinity property.
... this value behaves slightly differently than mathematical infinity: any positive value, including positive_infinity, multiplied by positive_infinity is positive_infinity.
... any negative value, including negative_infinity, multiplied by positive_infinity is negative_infinity.
...And 3 more matches

Object.create() - JavaScript
propertiesobject optional if specified and not undefined, an object whose enumerable own properties (that is, those properties defined upon itself and not enumerable properties along its prototype chain) specify property descriptors to be added to the newly-created object, with the corresponding property names.
... note that while the setting of null as [[prototype]] is supported in the real es5 object.create, this polyfill cannot support it due to a limitation inherent in versions of ecmascript lower than 5.
...this is for a single inheritance, which is all that javascript supports.
...And 3 more matches

RegExp.$1-$9 - JavaScript
description the $1, ..., $9 properties are static, they are not a property of an individual regular expression object.
...when parentheses are not included in the regular expression, the script interprets $n's literally (where n is a positive integer).
... examples using $n with string.replace the following script uses the replace() method of the string instance to match a name in the format first last and output it in the format last, first.
...And 3 more matches

String.prototype.charCodeAt() - JavaScript
description unicode code points range from 0 to 1114111 (0x10ffff).
...(for information on unicode, see the javascript guide.) note: charcodeat() will always return a value that is less than 65536.
... because of this, in order to examine (or reproduce) the full character for individual character values of 65536 or greater, for such characters, it is necessary to retrieve not only charcodeat(i), but also charcodeat(i+1) (as if manipulating a string with two letters), or to use codepointat(i) instead.
...And 3 more matches