Index - Web APIs
1300 fetch basic concepts api, fetch, fetch api, xmlhttprequest, concepts, guard, request at the heart of fetch are the interface abstractions of http requests, responses, headers, and body payloads, along with a global fetch method for initiating asynchronous resource requests.
...fetch also provides a single logical place to define other http-related concepts such as cors and extensions to http.
...this is the main landing page for mdn's indexeddb coverage — here we provide links to the full api reference and usage guides, browser support details, and some explanation of key concepts.
...And 12 more matches

Index - Learn web development
beginner, infrastructure, needsactivelearning, url, resources, urls with hypertext and http, url is one of the key concepts of the web.
... 52 general asynchronous programming concepts javascript, learn, promises, threads, asynchronous, blocking in this article, we'll run through a number of important concepts relating to asynchronous programming, and how this looks in web browsers and javascript.
... you should understand these concepts before working through the other articles in the module.
...And 10 more matches

Web Audio API - Web APIs
web audio concepts and usage the web audio api involves handling audio operations inside an audio context, and has been designed to allow modular routing.
... you can read about the theory of the web audio api in a lot more detail in our article basic concepts behind web audio api.
... there's also a basic concepts behind web audio api article, to help you understand the way digital audio works, specifically in the realm of the api.
...And 3 more matches

Index - Archive of obsolete content
750 a xul bestiary add-ons, extensions, needstechnicalreview, xul this xulnote presents some of the key concepts and terms in the xul development environment.
...i selected items for this group because they seemed to be either shrouded in mystery, misused as concepts or terms, or underestimated according to their role in xul and cross-platform development.
... 3246 creating a dynamic status bar extension add-ons, extensions, needsupdate concepts covered in the previous sample won't be reiterated here; instead, refer to the downloadable sample code or to the previous sample for further details.
...And 2 more matches

Using IndexedDB - Web APIs
if you are not familiar with indexeddb, you should first read basic concepts about indexeddb.
... with these big concepts under our belts, we can get to more concrete stuff.
... that may sound confusing, but this simple example should illustrate the concepts.
...And 2 more matches

Cascade and inheritance - Learn web development
overview: building blocks next the aim of this lesson is to develop your understanding of some of the most fundamental concepts of css — the cascade, specificity, and inheritance — which control how css is applied to html and how conflicts are resolved.
...we encourage you to work through this section carefully, and check that you understand the concepts before moving on.
...this can seem like a set of tricky concepts to understand.
... understanding how the concepts work together these three concepts together control which css applies to what element; in the below sections we'll see how they work together.

LocalFileSystem - Web APIs
basic concepts this section includes a few key concepts for the methods.
...(to learn more about the storage types, see the basic concepts article.) in most cases, you need to create only one file system, but in a few cases, it might be useful to create a second one.
...for more information about restrictions, see the basic concepts article.
...for more details, see the article on basic concepts.

CSS Box Alignment - CSS: Cascading Style Sheets
this document details the general concepts found in the specification.
... key concepts and terminology the specification details some alignment terminology to make it easier to discuss these alignment properties outside of their implementation within a particular layout method.
... there are also some key concepts which are common to all layout methods.
... layout box alignment for block, absolutely positioned and table layout reference css properties justify-content align-content place-content justify-items align-items place-items justify-self align-self place-self row-gap column-gap gap glossary entries cross axis main axis alignment container alignment subject fallback alignment guides css flexbox guide: basic concepts of flexbox css flexbox guide: aligning items in a flex container css grid guide: box alignment in css grid layouts external resources box alignment cheatsheet css grid, flexbox and box alignment thoughts on partial implementations of box alignment ...

Introduction - Archive of obsolete content
we'll start with a brief introduction to some key concepts, in case you're not familiar with mozilla and firefox.
... mozilla and firefox the term mozilla can be used to refer to several concepts: the mozilla project, the mozilla foundation, the mozilla corporation and the old mozilla browser.
... on to the tutorial with the basic concepts out of the way, we can now get right into extension development.

The web and web standards - Learn web development
you'll come across the below concepts at some point in your studies.
... accessibility means making your websites usable by as many different kinds of people as possible (related concepts are diversity and inclusion, and inclusive design).
...these two concepts are related but different.

Asynchronous JavaScript - Learn web development
if you are not familiar with the concept of asynchronous programming, you should definitely start with the general asynchronous programming concepts article in this module.
... guides general asynchronous programming concepts in this article we'll run through a number of important concepts relating to asynchronous programming, and how this looks in web browsers and javascript.
... you should understand these concepts before working through the other articles in the module.

Introduction to events - Learn web development
in this article, we discuss some important concepts surrounding events, and look at how they work in browsers.
... other event concepts in this section, we briefly cover some advanced concepts that are relevant to events.
... it is not important to understand these concepts fully at this point, but they might serve to explain some code patterns you'll likely come across.

Functions — reusable blocks of code - Learn web development
in this article we'll explore fundamental concepts behind functions such as basic syntax, how to invoke and define them, scope, and parameters.
... objective: to understand the fundamental concepts behind javascript functions.
... conclusion this article has explored the fundamental concepts behind functions, paving the way for the next one in which we get practical and take you through the steps to building up your own custom function.

An Overview of XPCOM
the book is presented as a tutorial about creating xpcom components, but it covers all major aspects, concepts, and terminology of the xpcom component model along the way.
... this chapter provides a quick tour of xpcom - an introduction to the basic concepts and technologies in xpcom and component development.
... the brief sections in this chapter introduce the concepts at a very high level, so that we can discuss and use them with more familiarity in the tutorial itself, which describes the creation of a mozilla component called weblock.

Fetch API - Web APIs
concepts and usage fetch provides a generic definition of request and response objects (and other things involved with network requests).
... it also defines related concepts such as cors and the http origin header semantics, supplanting their separate definitions elsewhere.
... note: find out more about using the fetch api features in using fetch, and study concepts in fetch basic concepts.

Introduction to the File and Directory Entries API - Web APIs
about this document this introduction discusses essential concepts and terminology in the file and directory entries api.
... it gives you the big picture and orients you to key concepts.
... big concepts before you start using the file and directory entries api, you need to understand a few concepts: the file and directory entries api is a virtual representation of a file system the file and directory entries api can use different storage types browsers impose storage quota the file and directory entries api has asynchronous and synchronous versions when using the asynchronous api, always...

IndexedDB API - Web APIs
this is the main landing page for mdn's indexeddb coverage — here we provide links to the full api reference and usage guides, browser support details, and some explanation of key concepts.
... key concepts and usage indexeddb is a transactional database system, like an sql-based rdbms.
... read more about the concepts behind indexeddb.

LocalFileSystemSync - Web APIs
basic concepts you can request access to a sandboxed file system by requesting localfilesystemsync object from within a web worker.
... for more concepts, see the counterpart article for the asynchronous api.
...for more details, see the article on basic concepts.

WebGL: 2D and 3D graphics for the web - Web APIs
guides and tutorials below, you'll find an assortment of guides to help you learn webgl concepts and tutorials that offer step-by-step lessons and examples.
... tutorials webgl tutorial a beginner's guide to webgl core concepts.
... webgl by example a series of live samples with short explanations that showcase webgl concepts and capabilities.

WebXR Device API - Web APIs
webxr device api concepts and usage example webxr hardware setup while the older webvr api was designed solely to support virtual reality (vr), webxr provides support for both vr and augmented reality (ar) on the web.
... guides and tutorials the following guides and tutorials are a great resource to learn how to comprehend webxr and the underlying 3d and vr/ar graphics concepts.
... geometry and reference spaces in webxr in this guide, the required concepts of 3d geometry are briefly reviewed, and the fundamentals of how that geometry is represented in webxr are detailed.

Introduction to Web development - Developer guides
html elements reference guide — a comprehensive guide to html elements with details on how browsers support them css getting started with css — an absolute beginners guide to css covers basic concepts and fundamentals css reference guide — a complete guide to css with details on the level of gecko/firefox support for each.
... common css questions — common questions and answers for beginners intermediate css concepts — grouping, pseudo-classes and more.
... advanced learning advanced javascript — john resig's guide to advanced javascript crockford on advanced javascript — a three part video series on advanced javascript concepts javascript garden — documentation of the most quirky parts of javascript.

Basics of HTTP - HTTP
http is an extensible protocol that relies on concepts like resources and uniform resource identifiers (uris), simple message structure, and client-server communication flow.
... on top of these basic concepts, numerous extensions have been developed over the years that add updated functionality and semantics with new http methods or headers.
...this article explains both concepts.

Media type and format guide: image, audio, and video content - Web media technologies
guides concepts digital audio concepts an introduction to how audio is converted into digital form and stored for use by computers.
... it explains basic concepts about how audio is sampled, as well as concepts such as sample rate, audio frames, and audio compression.
... digital video concepts a guide to fundamental concepts involved with digital video as used on the web, including basics about color formats, chroma subsampling, how human perception influences video coding, and so forth.

Layout System Overview - Archive of obsolete content
the most essential frame types are block and inline, and these correspond to the most important layout concepts, the block and line.
...block frame reflow state reflow metrics space manager styleset stylecontext see also layout faq document history 05/20/2002 - marc attinasi: created, wrote highest level introduction to general layout concepts, links to relevant specs and existing documents.

A XUL Bestiary - Archive of obsolete content
this xulnote presents some of the key concepts and terms in the xul development environment.
...i selected items for this group because they seemed to be either shrouded in mystery, misused as concepts or terms, or underestimated according to their role in xul and cross-platform development.

Index - Archive of obsolete content
3 a xul bestiary add-ons, extensions, needstechnicalreview, xul this xulnote presents some of the key concepts and terms in the xul development environment.
...i selected items for this group because they seemed to be either shrouded in mystery, misused as concepts or terms, or underestimated according to their role in xul and cross-platform development.

Introduction to Public-Key Cryptography - Archive of obsolete content
this document introduces the basic concepts of public-key cryptography.
... the sections that follow introduce the concepts of public-key cryptography that underlie these capabilities.

Archive of obsolete content
case sensitivity in class and id names creating a dynamic status bar extension concepts covered in the previous sample won't be reiterated here; instead, refer to the downloadable sample code or to the previous sample for further details.
... creating a status bar extension many of the concepts introduced here apply to any xul-based application; however, to keep from getting completely overwhelmed, we're going to focus specifically on firefox.

WebVR — Virtual Reality for the Web - Game development
note: for more information, read our webvr concepts article.
... using the webvr api the webvr api is based on two concepts — sending stereoscopic images to both lenses in your headset and receiving positional data for your head from the sensor, and those two are handled by hmdvrdevice (head-mounted display virtual reality device) and positionsensorvrdevice.

3D games on the Web - Game development
advanced concepts you can do a lot more with webgl.
... there are some advanced concepts which you should dive into and learn more about — like shaders, collision detection, or the latest hot topic: virtual reality on the web.

Legacy layout methods - Learn web development
prerequisites: html basics (study introduction to html), and an idea of how css works (study introduction to css and styling boxes.) objective: to understand the fundamental concepts behind the grid layout systems used prior to css grid layout being available in browsers.
...working through the process of creating a grid with floats shows you how this works and also introduces some more advanced concepts to build on the things you learned in the lesson on floats and clearing.

What is a URL? - Learn web development
prerequisites: you need to first know how the internet works, what a web server is and the concepts behind links on the web.
... summary with hypertext and http, url is one of the key concepts of the web.

Common questions - Learn web development
in this article we describe various web-related concepts: webpages, websites, web servers, and search engines.
... this article introduces the basic concepts behind web accessibility.

Graceful asynchronous programming with Promises - Learn web development
you should also go over the above section again a few more time to make sure these concepts stick.
... a more real-world example the above example was kept deliberately simple to make the concepts easy to understand, but it is not really very async.

Looping code - Learn web development
at this point, you probably understand the high-level concepts behind loops, but you are probably thinking "ok, great, but how does this help me write better javascript code?" as we said earlier, loops are all to do with doing the same thing over and over again, which is great for rapidly completing repetitive tasks.
... conclusion this article has revealed to you the basic concepts behind, and different options available when looping code in javascript.

JavaScript building blocks - Learn web development
in this article we'll explore fundamental concepts behind functions such as basic syntax, how to invoke and define functions, scope, and parameters.
...in this final article we will discuss some important concepts surrounding events, and look at how they work in browsers.

A first splash into JavaScript - Learn web development
you won't be expected to understand all of the code in detail immediately — we just want to introduce you to the high-level concepts for now, and give you an idea of how javascript (and other programming languages) work.
...the code syntax looks different, but the concepts are still largely the same.

Aprender y obtener ayuda - Learn web development
certain technique or important concept (such as "learn how to create a video player" or "learn the css box model"), and some of the articles will be reference material, to allow you to look up details you may have forgotten (such as "what is the syntax of the css background property"?) mdn web docs is very good for both types — the area you are currently in is great for learning techniques and concepts, and we also have several giant reference sections allowing you to look up any syntax you can't remember.
...many people prefer textual articles for more in-depth learning and reference material, and videos for quick explanations of concepts and new features, but it is really up to you what you prefer to learn from.

Deployment and next steps - Learn web development
the svelte handbook, by flavio copes, is also a useful reference for learning the main svelte concepts.
... we also saw some advanced concepts and techniques to interact with dom elements and to programmatically extend html element capabilities using the use directive.

Getting started with Svelte - Learn web development
it arguably has fewer concepts and tools to learn than some of the other framework options.
... we encourage you to go through the svelte tutorial for a really quick introduction to the basic concepts, before returning to this tutorial series to learn how to build something slightly more in-depth.

Introduction to cross browser testing - Learn web development
objective: to gain an understanding of the high-level concepts involved in cross browser testing.
... reporting bugs just to reiterate on what was said above, if you discover bugs in browsers, you should report them: firefox bugzilla edgehtml issue tracker safari chrome opera summary this article should have given you a high-level understanding of the most important concepts you need to know about cross browser testing.

Avoiding leaks in JavaScript XPCOM components
take every information on this site with a grain of salt, although most concepts and best practices still apply.
...this document attempts to help them do so, first by explaining the underlying concepts, and second by describing a number of common javascript patterns that cause leaks.

Index
this document attempts to help them do so, first by explaining the underlying concepts, and second by describing a number of common javascript patterns that cause leaks.
...the book is presented as a tutorial about creating xpcom components, but it covers all major aspects, concepts, and terminology of the xpcom component model along the way.

Thunderbird extensions
gloda provides concepts such as conversations, messages, identities, contacts.
... all these concepts are related : a conversation contains messages which are linked to identities (from field, to field) which are themselves part of a contact: indeed, a contact has multiple identities.

Dominators - Firefox Developer Tools
this article provides an introduction to the concepts of reachability, shallow versus retained size, and dominators, as they apply in garbage-collected languages like javascript.
... these concepts matter in memory analysis, because often an object may itself be small, but may hold references to other much larger objects, and by doing this will prevent the garbage collector from freeing that extra memory.

Dominators view - Firefox Developer Tools
otherwise, you might want to review the article on dominators concepts.
...see the relevant section of the dominators concepts article.

FileSystemEntrySync - Web APIs
basic concepts the filesystementrysync interface includes methods that you would expect for manipulating files and directories, but it also include a really handy method for getting a url of the entry: tourl().
...for more information, see the article on basic concepts.

The HTML DOM API - Web APIs
html dom concepts and usage in this article, we'll focus on the parts of the html dom that involve engaging with html elements.
...from node, the element inherits concepts surrounding the ability for the element to be contained by another element, and to contain other elements itself.

Media Capture and Streams API (Media Stream) - Web APIs
concepts and usage the api is based on the manipulation of a mediastream object representing a flux of audio- or video-related data.
... capabilities, constraints, and settingsthe twin concepts of constraints and capabilities let the browser and web site or app exchange information about what constrainable properties the browser's implementation supports and what values it supports for each one.

PaymentRequest: merchantvalidation event - Web APIs
see merchant validation in payment processing concepts for details on how the merchant validation process works.
...event.complete(async () => { const merchantserverurl = window.location.origin + '/validate?url=' + encodeuricomponent(event.validationurl); // get validation data, and complete validation; return await fetch(merchantserverurl).then(response => response.text()); }); }; const response = await request.show(); for more information, see merchant validation in payment processing concepts.

Using readable streams - Web APIs
note: this article assumes that you understand the use cases of readable streams, and are aware of the high-level concepts.
... if not, we suggest that you first read the streams concepts and usage overview and dedicated streams api concepts article, then come back.

Using writable streams - Web APIs
note: this article assumes that you understand the use cases of writable streams, and are aware of the high-level concepts.
... if not, we suggest that you first read the streams concepts and usage overview and dedicated streams api concepts article, then come back.

Streams API - Web APIs
concepts and usage streaming involves breaking a resource that you want to receive over a network down into small chunks, then processing it bit by bit.
... note: you can find a lot more details about the theory and practice of streams in our articles — streams api concepts, using readable streams, and using writable streams.

URL API - Web APIs
the url standard also defines concepts such as domains, hosts, and ip addresses, and also attempts to describe in a standard way the legacy application/x-www-form-urlencoded mime type used to submit web forms' contents as a set of key/value pairs.
... url concepts and usage the majority of the url standard is taken up by the definition of a url and how it is structured and parsed.

WebGL by example - Web APIs
next » webgl by example is a series of live samples with short explanations that showcase webgl concepts and capabilities.
...we believe that it leads to a more effective learning experience and ultimately a deeper understanding of the underlying concepts.

Viewpoints and viewers: Simulating cameras in WebXR - Web APIs
there are a few articles about the fundamental math, geometry, and other concepts behind webgl and webxr which may be useful to read before or while reading this one, including: explaining basic 3d theory matrix math for the web webgl model view projection geometry and reference spaces in webxr ed.
... this has been a very quick overview of the concepts of position in terms of physical location, orientation or facing direction, and perspective.

Web Animations API - Web APIs
concepts and usage the web animations api provides a common language for browsers and developers to describe animations on dom elements.
... to get more information on the concepts behind the api and how to use it, read using the web animations api.

Web Accessibility: Understanding Colors and Luminance - Accessibility
color, contrast, and luminance are among the most central and critical concepts to creating accessible web content with color.
...in others, "chroma" and "saturation" are two different concepts.

Controlling Ratios of Flex Items Along the Main Axis - CSS: Cascading Style Sheets
.item { flex: 2 1 auto; } if you have read the article basic concepts of flexbox, then you will have already had an introduction to the properties.
... important concepts when working on the main axis there are a few concepts worth digging into before looking at how the flex properties work to control ratios along the main axis.

Relationship of flexbox to other layout methods - CSS: Cascading Style Sheets
writing modes in the basic concepts of flexbox article, i explained that flexbox is writing mode aware.
...as already described in the basic concepts article, flex items can be allowed to wrap but, once they do so, each line becomes a flex container of its own.

CSS reference - CSS: Cascading Style Sheets
you can also browse key css concepts and a list of selectors organized by type.
... concepts syntax and semantics css syntax at-rules cascade comments descriptor inheritance shorthand properties specificity value definition syntax css unit and value types values actual value computed value initial value resolved value specified value used value layout block formatting context box model containing block layout mode margin collapsing replaced elements stac...

CSS Tutorials - CSS: Cascading Style Sheets
it explains the fundamental concepts of the language and guides you in writing basic stylesheets.
...they are easy to use for anybody with a fair knowledge of basic concepts.

display - CSS: Cascading Style Sheets
please note that the css display level 3 spec defines how the contents value should affect "unusual elements" — elements that aren’t rendered purely by css box concepts such as replaced elements.
... adapting to the new two-value syntax of display css flow layout (display: block, display: inline) block and inline layout in normal flow flow layout and overflow flow layout and writing modes formatting contexts explained in flow and out of flow display: flex basic concepts of flexbox aligning items in a flex container controlling ratios of flex items along the main axis cross-browser flexbox mixins mastering wrapping of flex items ordering flex items relationship of flexbox to other layout methods backwards compatibility of flexbox typical use cases of flexbox display: grid basic concepts of grid layout relationship to other layout methods line-based...

Constraint validation - Developer guides
for a basic introduction to these concepts, with examples, see the form validation tutorial.
... note: this is not a comprehensive postal code validation library, but rather a demonstration of the key concepts.

HTTP Index - HTTP
it relies on a few basic concepts like the notion of resources and uris, a simple structure of messages, and a client-server structure for the communication flow.
... on top of these basic concepts, numerous extensions have appeared over the years, adding new functionality and new semantics by creating new http methods or headers.

Introduction - JavaScript
« previousnext » this chapter introduces javascript and discusses some of its fundamental concepts.
... 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.

Web audio codec guide - Web media technologies
for information about the fundamental concepts behind how digital audio works, see the article digital audio concepts.
... for more information about these and other features of audio data, see audio data format and structure in digital audio concepts.

The "codecs" parameter in common media types - Web media technologies
see yuv in digital video concepts for details on how the yuv color system works.
...the following table lists permitted values; see chroma subsampling in digital video concepts for additional information about this topic and others.

XSLT: Extensible Stylesheet Language Transformations
xslt & xpath tutorial the topxml xslt tutorial introduces you to the basics of xslt concepts, syntax, and programming.
... this extensive introduction to xslt and xpath assumes no prior knowledge of the technologies and guides the reader through background, context, structure, concepts and introductory terminology.

Using the WebAssembly JavaScript API - WebAssembly
note: if you are unfamiliar with the basic concepts mentioned in this article and need more explanation, read webassembly concepts first, then come back.
... in this memory model, any load or store can access any byte in the entire linear memory, which is necessary to faithfully represent c/c++ concepts like pointers.

Local Storage - Archive of obsolete content
there's a section about sqlite templates in the guide, but there are some concepts in it that will require you to read at least some of the rest of it.

Adding preferences to an extension - Archive of obsolete content
as before, concepts covered in the previous articles in this series won't be rehashed here, so if you haven't already seen them: creating a status bar extension creating a dynamic status bar extension also, for reference, you may want to take a look at preferences system and the preferences api.

Creating a dynamic status bar extension - Archive of obsolete content
concepts covered in the previous sample won't be reiterated here; instead, refer to the downloadable sample code or to the previous sample for further details.

Creating a status bar extension - Archive of obsolete content
many of the concepts introduced here apply to any xul-based application; however, to keep from getting completely overwhelmed, we're going to focus specifically on firefox.

Introduction to XUL - Archive of obsolete content
this code introduces several concepts useful for creating real world windows not explicitly covered in this document.

Introduction to SSL - Archive of obsolete content
the document assumes that you are familiar with the basic concepts of public-key cryptography, as summarized in "introduction to public-key cryptography." the ssl protocol the transmission control protocol/internet protocol (tcp/ip) governs the transport and routing of data over the internet.

Security - Archive of obsolete content
this document introduces the basic concepts of public-key cryptography.

Back to the Server: Server-Side JavaScript On The Rise - Archive of obsolete content
listing 6 shows the beginning of our application which takes advantage of some of these concepts.

Building up a basic demo with A-Frame - Game development
it is easy to start with, but also provides a powerful api for advanced concepts, as well as dealing with cross browser differences and suchlike.

Building up a basic demo with Babylon.js - Game development
if you have already worked through our building up a basic demo series with three.js, playcanvas or a-frame (or you are familiar with other 3d libraries) you'll notice that babylon.js works on similar concepts: camera, light and objects.

Building up a basic demo with the PlayCanvas engine - Game development
if you have already worked through our building up a basic demo with three.js article (or you are familiar with other 3d libraries) you'll notice that playcanvas works on similar concepts: camera, light and objects.

Collision detection - Game development
this won't give a perfect result every time, and there are much more sophisticated ways to do collision detection, but this will work fine for teaching you the basic concepts.

Cross Axis - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference align-content align-items align-self flex-wrap flex-direction flex further reading css flexbox guide: basic concepts of flexbox css flexbox guide: aligning items in a flex container css flexbox guide: mastering wrapping of flex items ...

Flex - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference align-content align-items align-self flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap justify-content order further reading css flexible box layout module level 1 specification css flexbox guide: basic concepts of flexbox css flexbox guide: relationship of flexbox to other layout methods css flexbox guide: aligning items in a flex container css flexbox guide: ordering flex items css flexbox guide: controlling ratios of flex items along the main axis css flexbox guide: mastering wrapping of flex items css flexbox guide: typical use cases of flexbox ...

Flex Container - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference align-content align-items flex flex-direction flex-flow flex-wrap justify-content further reading css flexbox guide: basic concepts of flexbox css flexbox guide: aligning items in a flex container css flexbox guide: mastering wrapping of flex items ...

Flex Item - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference align-self flex-basis flex-grow flex-shrink order further reading css flexbox guide: basic concepts of flexbox css flexbox guide: ordering flex items css flexbox guide: controlling ratios of flex items along the main axis ...

Flexbox - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference align-content align-items align-self flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap justify-content order further reading css flexible box layout module level 1 specification css flexbox guide: basic concepts of flexbox css flexbox guide: relationship of flexbox to other layout methods css flexbox guide: aligning items in a flex container css flexbox guide: ordering flex items css flexbox guide: controlling ratios of flex items along the main axis css flexbox guide: mastering wrapping of flex items css flexbox guide: typical use cases of flexbox ...

Grid Areas - MDN Web Docs Glossary: Definitions of Web-related terms
grid-template-areas: "a a b" "a a b"; } .item1 { grid-area: a; } .item2 { grid-area: b; } <div class="wrapper"> <div class="item1">item</div> <div class="item2">item</div> </div> learn more property reference grid-template-columns grid-template-rows grid-auto-rows grid-auto-columns grid-template-areas grid-area further reading css grid layout guide: basic concepts of grid layout css grid layout guide: grid template areas definition of grid areas in the css grid layout specification ...

Grid Axis - MDN Web Docs Glossary: Definitions of Web-related terms
learn more further reading css grid layout guide: basic concepts of grid layout css grid layout guide: box alignment in grid layout css grid layout guide: grids, logical values and writing modes ...

Grid Cell - MDN Web Docs Glossary: Definitions of Web-related terms
#d9480f; } .wrapper { display: grid; grid-template-columns: repeat(3,1fr); grid-auto-rows: 100px; } <div class="wrapper"> <div>one</div> <div>two</div> <div>three</div> <div>four</div> <div>five</div> </div> learn more property reference grid-template-columns grid-template-rows grid-auto-rows grid-auto-columns further reading css grid layout guide: basic concepts of grid layout definition of grid cells in the css grid layout specification ...

Grid Column - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference grid-template-columns grid-auto-columns grid grid-template further reading css grid layout guide: basic concepts of grid layout ...

Grid container - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference grid-template-columns grid-template-rows grid-auto-columns grid-auto-rows grid grid-template further reading css grid layout guide: basic concepts of grid layout ...

Grid Lines - MDN Web Docs Glossary: Definitions of Web-related terms
ow1-start] 100px [row2-start] 100px [rows-end]; } .item { grid-column-start: col1-start; grid-column-end: col3-start; grid-row-start: row1-start; grid-row-end: rows-end; } learn more property reference grid-template-columns grid-template-rows grid-column-start grid-column-end grid-column grid-row-start grid-row-end grid-row further reading css grid layout guide: basic concepts of grid layout css grid layout guide: line-based placement with css grid css grid layout guide: layout using named grid lines css grid layout guide: css grids, logical values and writing modes definition of grid lines in the css grid layout specification ...

Grid Row - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference grid-template-rows grid-auto-rows grid grid-template further reading css grid layout guide: basic concepts of grid layout ...

Guard - MDN Web Docs Glossary: Definitions of Web-related terms
for more information, read fetch basic concepts: guard.

Gutters - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference grid-column-gap grid-row-gap grid-gap further reading css grid layout guide: basic concepts of grid layout definition of gutters in the css grid layout specification ...

HTTP/2 - MDN Web Docs Glossary: Definitions of Web-related terms
all the core concepts found in http 1.1, such as http methods, status codes, uris, and header fields, remain in place.

Index - MDN Web Docs Glossary: Definitions of Web-related terms
for more information, read fetch basic concepts: guard.

Main Axis - MDN Web Docs Glossary: Definitions of Web-related terms
learn more property reference flex-basis flex-direction flex-grow flex-shrink justify-content flex further reading css flexbox guide: basic concepts of flexbox css flexbox guide: aligning items in a flex container css flexbox guide: controlling ratios of flex items along the main axis ...

TLD - MDN Web Docs Glossary: Definitions of Web-related terms
sponsored top-level domains (stld) these domains are proposed and sponsored by private organizations that decide whether an applicant is eligible to use the tld, based on community theme concepts.

Handling different text directions - Learn web development
summary the concepts explained in this lesson are becoming increasingly important in css.

Sizing items in CSS - Learn web development
when you move onto css layout, sizing will become very important in mastering the different layout methods, so it is worth understanding the concepts here before moving on.

CSS building blocks - Learn web development
cascade and inheritance the aim of this lesson is to develop your understanding of some of the most fundamental concepts of css — the cascade, specificity, and inheritance — which control how css is applied to html and how conflicts are resolved.

Grids - Learn web development
prerequisites: html basics (study introduction to html), and an idea of how css works (study introduction to css and styling boxes.) objective: to understand the fundamental concepts behind grid layout systems, and how to implement a grid layout using css grid.

Introduction to CSS layout - Learn web development
overview: css layout next this article will recap some of the css layout features we've already touched upon in previous modules — such as different display values — and introduce some of the concepts we'll be covering throughout this module.

Responsive design - Learn web development
prerequisites: html basics (study introduction to html), and an idea of how css works (study css first steps and css building blocks.) objective: to understand the fundamental concepts and history of responsive design.

CSS layout - Learn web development
introduction to css layout this article will recap some of the css layout features we've already touched upon in previous modules — such as different display values — and introduce some of the concepts we'll be covering throughout this module.

CSS first steps - Learn web development
we have already met many of the concepts discussed here; you can return to this one to recap if you find any later concepts confusing.

What is the difference between webpage, website, web server, and search engine? - Learn web development
in this article, we describe various web-related concepts: web pages, websites, web servers, and search engines.

What is accessibility? - Learn web development
this article introduces the basic concepts behind web accessibility.

Client-side form validation - Learn web development
this article leads you through basic concepts and examples of client-side form validation.

UI pseudo-classes - Learn web development
styling inputs based on whether they are required or not one of the most basic concepts with regards to client-side form validation is whether a form input is required (it has to be filled in before the form can be submitted) or optional.

Document and website structure - Learn web development
we use color and font size to draw sighted users' attention to the most useful parts of the content, like the navigation menu and related links, but what about visually impaired people for example, who might not find concepts like "pink" and "large font" very useful?

Getting started with HTML - Learn web development
the subsequent articles of this module go further on some of the topics introduced here, as well as presenting other concepts of the language.

Introduction to HTML - Learn web development
this module will introduce the first two of these and introduce fundamental concepts and syntax you need to know to understand html.

Structuring the web with HTML - Learn web development
introduction to html this module sets the stage, getting you used to important concepts and syntax, looking at applying html to text, how to create hyperlinks, and how to use html to structure a webpage.

Making asynchronous programming easier with async and await - Learn web development
previous overview: asynchronous next in this module general asynchronous programming concepts introducing asynchronous javascript cooperative asynchronous javascript: timeouts and intervals graceful asynchronous programming with promises making asynchronous programming easier with async and await choosing the right approach ...

Choosing the right approach - Learn web development
further information making asynchronous programming easier with async and await async function reference await operator reference previous overview: asynchronous in this module general asynchronous programming concepts introducing asynchronous javascript cooperative asynchronous javascript: timeouts and intervals graceful asynchronous programming with promises making asynchronous programming easier with async and await choosing the right approach ...

Introducing asynchronous JavaScript - Learn web development
previous overview: asynchronous next in this module general asynchronous programming concepts introducing asynchronous javascript cooperative asynchronous javascript: timeouts and intervals graceful asynchronous programming with promises making asynchronous programming easier with async and await choosing the right approach ...

Cooperative asynchronous JavaScript: Timeouts and intervals - Learn web development
previous overview: asynchronous next in this module general asynchronous programming concepts introducing asynchronous javascript cooperative asynchronous javascript: timeouts and intervals graceful asynchronous programming with promises making asynchronous programming easier with async and await choosing the right approach ...

Object prototypes - Learn web development
this section is intentionally simplified to make these concepts a little easier to understand when you first meet them.

JavaScript performance - Learn web development
we'll introduce concepts for handling that as well.

Website security - Learn web development
we hope you've enjoyed learning these fundamental concepts, and you're now ready to select a web framework and start programming.

Server-side website programming - Learn web development
basic knowledge of programming concepts (or of a particular programming language) is useful, but not essential.

Ember resources and troubleshooting - Learn web development
both of these try to solve the problems of mut by introducing more obvious / "less magic" concepts, avoiding build-time transforms and implicit glimmer vm behavior.

Introduction to client-side frameworks - Learn web development
note: if you want to find out more details about web tooling concepts, have a read of our client-side tooling overview.

Starting our Svelte Todo list app - Learn web development
this will be the basic functionality that we'll be developing in this tutorial series, plus we'll look at some more advanced concepts along the way too.

Componentizing our Svelte app - Learn web development
the code so far git to see the state of the code as it should be at the end of this article, access your copy of our repo like this: cd mdn-svelte-tutorial/05-advanced-concepts or directly download the folder's content: npx degit opensas/mdn-svelte-tutorial/05-advanced-concepts remember to run npm install && npm run dev to start your app in development mode.

Advanced Svelte: Reactivity, lifecycle, accessibility - Learn web development
code along with us git clone the github repo (if you haven't already done it) with: git clone https://github.com/opensas/mdn-svelte-tutorial.git then to get to the current app state, run cd mdn-svelte-tutorial/05-advanced-concepts or directly download the folder's content: npx degit opensas/mdn-svelte-tutorial/05-advanced-concepts remember to run npm install && npm run dev to start your app in development mode.

Dynamic behavior in Svelte: working with variables and props - Learn web development
objective: learn and put into practice some basic svelte concepts, like creating components, passing data using props, render javascript expressions into our markup, modify the components state and iterating over lists.

Creating our first Vue component - Learn web development
along the way, we'll learn about a few important concepts such as calling components inside other components, passing data to them via props, and saving data state.

Getting started with Vue - Learn web development
in the next article we'll build our first custom component, and look at some important concepts such as passing props into it and saving its data state.

Understanding client-side JavaScript frameworks - Learn web development
along the way, we'll learn about a few important concepts such as calling components inside other components, passing data to them via props and saving data state.

Implementing feature detection - Learn web development
summary this article covered feature detection in a reasonable amount of detail, going through the main concepts and showing you how to both implement your own feature detection tests and use the modernizr library to implement tests more easily.

Strategies for carrying out testing - Learn web development
objective: to gain an understanding of the high-level concepts involved in cross-browser testing.

Accessibility/LiveRegionDevGuide
however, many of the concepts were also used during the development of firevox, an at using iaccessible2.

Mozilla accessibility architecture
in general, the accessibility apis use similar concepts, but use different method, constant and interfaces names.

Software accessibility: Where are we today?
refreshable braille displays of various sizes a braille embosser audio- and braille- based user interfaces are concepts that software designers are historically untrained for.

Accessibility and Mozilla
however, many of the concepts were also used during the development of firevox, an at using iaccessible2.accessible toolkit checklistplease contact the mozilla accessibility community with questions or feedback.csun firefox materialsfirefox 1.5 is a fast, free, standards compliant web browser which is rapidly gaining recognition for its fresh, streamlined approach to browsing the web.

Index
686 theme concepts theme, add-on themes developed using the webextensions api in firefox enable you to change the look of the browser by adding images to the header area of the firefox browser; this is the area behind the menu bar, toolbars, address bar, search bar, and tab strip.

Themes
browser themes browser theme concepts get an introduction to creating themes for the latest versions of firefox using the amo theme generator use the theme generator to create and submit a new theme to amo lightweight themes lightweight themes have been deprecated and are no longer accepted by amo.

A bird's-eye view of the Mozilla framework
thehelp viewer files referenced in the article are located in /seamonkey/extensions/help/ this article also assumes you are familiar with the javascript and c++ programming languages, object-oriented programming (oop) terminology and design concepts, the microsoft® component object model (com), and the corba omg interface definition language (idl).

How Mozilla's build system works
the contents below will explain the basic concepts and terminology of the build system and how to do common tasks such as compiling components and creating jar files.

Inner and outer windows
this article will try to explain the concepts of inner and outer windows.

Browser API
browser api concepts and usage the browser api consists of two major parts: custom <iframe> attributes: by adding a mozbrowser attribute to the <iframe> element we can make it appear like a top-level browser window to the embedded content.

Script security
security checks to determine the security relation between two compartments, gecko uses two concepts: security principals and the act of subsuming.

Gecko's "Almost Standards" Mode
recommendations for authors who are attempting to migrate to validated markup using either html 4.01 or xhtml 1.0, and who are still using image-in-table design concepts, make sure to use a doctype that will trigger "almost standards" mode.

Mozilla Content Localized in Your Language
used to express certain concepts in your language?

Mozilla Style System Documentation
(the "non-element" style contexts are defined never to match any rules.) these interfaces nsistylesheet and nsistylerule correspond to the css concepts of style sheets and style rules, except they are more general, and are used by other code that needs to add style information to the document.

Power profiling overview
basic physics concepts in physics, power is the rate of doing work.

About NSPR
(the "20" in "nspr20" does not mean "version 2.0" but rather "second generation".) many of the concepts have been reformed, expanded, and matured.

Introduction to NSPR
this chapter introduces key nspr programming concepts and illustrates them with sample code.

An overview of NSS Internals
often nss has multiple implementations for the same or similar concepts.

Index
often nss has multiple implementations for the same or similar concepts.

Introduction to Network Security Services
what you should already know before using nss, you should be familiar with the following topics: concepts and techniques of public-key cryptography the secure sockets layer (ssl) protocol the pkcs #11 standard for cryptographic token interfaces cross-platform development issues and techniques where to find more information for information about pki and ssl that you should understand before using nss, see the following: introduction to public-key cryptography introduction to ssl for links ...

JSS
explains the basic concepts of public-key cryptography that underlie nss and jss.

sslintro.html
an ssl application typically includes five parts: initialization configuration communication functions used by callbacks cleanup although the details differ somewhat for client and server applications, the concepts and many of the functions are the same for both.

Network Security Services
introduction to public-key cryptography explains the basic concepts of public-key cryptography that underlie nss.

JSAPI User Guide
in the environment we have created, the "hello world" script looks like this: system("echo hello world"); jsapi concepts this section aims to fill in the major gaps in the picture of the jsapi presented so far.

JS_GetFunctionObject
but in the jsapi there are two separate concepts: a jsobject is what is exposed to scripts and has properties and can be stored in variables; and the corresponding jsfunction contains the code of a function.

Preface
important terms and new concepts are also italicized the first time they appear in the text.

XPCOM guide
this document attempts to help them do so, first by explaining the underlying concepts, and second by describing a number of common javascript patterns that cause leaks.creating xpcom componentsthis guide is about gecko, and about creating xpcom components for gecko-based applications.how to build an xpcom component in javascriptif you are looking for add-on sdk solution for xpcom javascript components then check out platform/xpcom module first.inheriting from implementation classe...

Index
however, in many cases you only need to learn a few concepts to write an extension.

Debugger-API - Firefox Developer Tools
gecko-specific features while the debugger core api deals only with concepts common to any javascript implementation, it also includes some gecko-specific features: [global tracking][global] supports debugging all the code running in a gecko instance at once—the ‘chrome debugging’ model.

Memory - Firefox Developer Tools
concepts dominators example pages examples used in the memory tool documentation.

Background Tasks API - Web APIs
concepts and usage the main thread of a web browser is centered around its event loop.

BaseAudioContext.createBuffer() - Web APIs
syntax var buffer = baseaudiocontext.createbuffer(numofchannels, length, samplerate); parameters note: for an in-depth explanation of how audio buffers work, and what these parameters mean, read audio buffers: frames, samples and channels from our basic concepts guide.

CSS Painting API - Web APIs
concepts and usage essentially, the css painting api contains functionality allowing developers to create custom values for paint(), a css <image> function.

Channel Messaging API - Web APIs
channel messaging concepts and usage a message channel is created using the messagechannel() constructor.

Console API - Web APIs
concepts and usage the console api started as a largely proprietary api, with different browsers implementing it, albeit it in inconsistent ways.

Constraint validation API - Web APIs
concepts and usage certain html form controls, such as <input>, <select> and <textarea>, can restrict the format of allowable values, using attributes like required and pattern to set basic constraints.

Content Index API - Web APIs
concepts and usage as it stands, offline web content is not easily discoverable by users.

Credential Management API - Web APIs
credential management concepts and usage this api lets websites interact with a user agent’s password system so that websites can deal in a uniform way with site credentials and user agents can provide better assistance with the management of their credentials.

DirectoryEntrySync - Web APIs
basic concepts if you want to create subdirectories, you have to create each child directory in sequence.

DirectoryReaderSync - Web APIs
basic concepts before you call the only method in this interface, readentries(), create the directoryentrysync object.

Using the W3C DOM Level 1 Core - Web APIs
now that you are familiar with the basic concepts of the dom, you may want to learn about the dom level 1 fundamental methods.

Using Fetch - Web APIs
fetch also provides a single logical place to define other http-related concepts such as cors and extensions to http.

FileEntrySync - Web APIs
basic concepts to write content to file, create a filewriter object by calling createwriter().

FileException - Web APIs
basic concepts synchronous apis do not have error callbacks, which makes it difficult to catch errors.

FileSystem - Web APIs
basic concepts there are two ways to get access to a filesystem object: you can directly ask for one representing a sandboxed file system created just for your web app directly by calling window.requestfilesystem().

FileSystemDirectoryEntry - Web APIs
basic concepts you can create a new directory by calling getdirectory().

FileSystemEntry - Web APIs
basic concepts you don't create filesystementry objects directly.

FileSystemFileEntry - Web APIs
basic concepts to write content to file, create a filewriter object by calling createwriter().

FileSystemSync - Web APIs
basic concepts the filesystemsync object is your gateway to the entire api and you will use it a lot.

Geolocation API - Web APIs
concepts and usage you will often want to retrieve a user's location information in your web app, for example to plot their location on a map, or display personalized information relevant to their location.

History API - Web APIs
concepts and usage moving backward and forward through the user's history is done using the back(), forward(), and go() methods.

InputDeviceCapabilities API - Web APIs
input device capabilities concepts and usage because dom events abstract device input, they provide no way to learn what device or type of device fired an event.

Intersection Observer API - Web APIs
one thing the intersection observer api can't tell you: the exact number of pixels that overlap or specifically which ones they are; however, it covers the much more common use case of "if they intersect by somewhere around n%, i need to do something." intersection observer concepts and usage the intersection observer api allows you to configure a callback that is called: (1) whenever one element, called the target, intersects either the device viewport or a specified element; for the purpose of this api, this is called the root element or root (2) and whenever the observer is asked to watch a target for the very first time typically, you'll want to watch for intersectio...

Keyboard API - Web APIs
keyboard api concepts and usage keyboard mapping on physical keyboards, the code attribute contains the physical location of the key that was pressed, and the key attribute contains the string generated by pressing the key at that physical location on the keyboard.

Long Tasks API - Web APIs
concepts some key terms or ideas that are utilized by the long tasks api.

MediaStream Image Capture API - Web APIs
mediastream image capture concepts and usage the process of retrieving an image or video stream happens as described below.

MediaStream Recording API - Web APIs
basic concepts the mediastream recording api is comprised of a single major interface, mediarecorder, which does all the work of taking the data from a mediastream and delivering it to you for processing.

Media Capabilities API - Web APIs
'' : 'not ') + 'power efficient.') }) .catch(() => { console.log("decodinginfo error: " + contenttype) }); } media capabilities api concepts and usage there are a myriad of video and audio codecs.

Media Session API - Web APIs
media session concepts and usage the mediametadata interface lets a web site provide rich metadata to the platform ui for media that is playing.

Media Source API - Web APIs
media source extensions concepts and usage playing video and audio has been available in web applications without plugins for a few years now, but the basic features offered have really only been useful for playing single whole tracks.

Capabilities, constraints, and settings - Web APIs
the twin concepts of constraints and capabilities let the browser and web site or app exchange information about what constrainable properties the browser's implementation supports and what values it supports for each one.

MerchantValidationEvent.methodName - Web APIs
see merchant validation in payment processing concepts for more information on the process.

MerchantValidationEvent.validationURL - Web APIs
see merchant validation in payment processing concepts for more information on the merchant validation process.

MerchantValidationEvent - Web APIs
to learn more about merchant validation, see merchant validation in payment processing concepts.

Navigation Timing API - Web APIs
concepts and usage you can use the navigation timing api to gather performance data on the client side, which you can then transmit to a server using xmlhttprequest or other techniques.

Notifications API - Web APIs
concepts and usage on supported platforms, showing a system notification generally involves two things.

OfflineAudioContext.OfflineAudioContext() - Web APIs
for more detail, read audio buffers: frames, samples and channels from our basic concepts guide.

PaymentRequest.onmerchantvalidation - Web APIs
dation = ev => { ev.complete(async () => { const merchantserverurl = window.location.origin + '/validation?url=' + encodeuricomponent(ev.validationurl); // get validation data, and complete validation; return await fetch(merchantserverurl).then(r => r.text()); }) }; const response = await request.show(); for more information, see merchant validation in payment processing concepts.

PaymentResponse.methodName - Web APIs
see merchant validation in payment processing concepts for more information.

Payment Request API - Web APIs
payment request concepts and usage many problems related to online shopping-cart abandonment can be traced to checkout forms, which can be difficult and time consuming to fill out and often require multiple steps to complete.

Permissions API - Web APIs
concepts and usage historically different apis handle their own permissions inconsistently — for example the notifications api allows for explicit checking of permission status and requesting permission, whereas the geolocation api doesn't (which causes problems if the user denied the initial permission request).

Pointer Lock API - Web APIs
basic concepts pointer lock is related to mouse capture.

Push API - Web APIs
push concepts and usage when implementing pushmanager subscriptions, it is vitally important that you protect against csrf/xsrf issues in your app.

Reporting API - Web APIs
concepts and usage there are a number of different features and problems on the web platform that generate information useful to web developers when they are trying to fix bugs or improve their websites in other ways.

Resize Observer API - Web APIs
concepts and usage there are a whole raft of use cases for responsive design techniques (and others besides) that respond to changes in an element's size, but previously their implementations have often been hacky and/or brittle.

Screen Capture API - Web APIs
screen capture api concepts and usage the screen capture api is relatively simple to use.

Screen Wake Lock API - Web APIs
concepts and usage most devices by default turn off their screen after a specified amount of time to prolong the life of the hardware.

Selection API - Web APIs
concepts and usage to retrieve the current text range the user has selected, you can use the window.getselection() or document.getselection() method, storing the return value — a selection object — in a variable for futher use.

Sensor APIs - Web APIs
sensor apis concepts and usage although the generic sensor api specification defines a sensor interface, as a web developer you will never use it.

Server-sent events - Web APIs
concepts and usage to learn how to use server-sent events, see our article using server-sent events.

Service Worker API - Web APIs
service worker concepts and usage a service worker is an event-driven worker registered against an origin and a path.

Storage Access API - Web APIs
concepts and usage most browsers implement a number of storage access policies that restrict access to cookies and site data for embedded, cross-origin resources.

Visual Viewport API - Web APIs
visual viewport concepts and usage the mobile web contains two viewports, the layout viewport and the visual viewport.

A basic 2D WebGL animation example - Web APIs
result this is a pretty simple example, since it's just drawing one simple object, but the concepts used here extend to much more complex animations.

Adding 2D content to a WebGL context - Web APIs
we'll do that using a function we call initbuffers(); as we explore more advanced webgl concepts, this routine will be augmented to create more -- and more complex -- 3d objects.

Getting started with WebGL - Web APIs
it's assumed that you already have an understanding of the mathematics involved in 3d graphics, and this article doesn't pretend to try to teach you 3d graphics concepts itself.

WebGL model view projection - Web APIs
these matrices are core to moving data around on the screen, and are concepts that transcend individual frameworks and engines.

Establishing a connection: The WebRTC perfect negotiation pattern - Web APIs
perfect negotiation concepts perfect negotiation makes it possible to seamlessly and completely separate the negotiation process from the rest of your application's logic.

WebRTC API - Web APIs
webrtc concepts and usage webrtc serves multiple purposes; together with the media capture and streams api, they provide powerful multimedia capabilities to the web, including support for audio and video conferencing, file exchange, screen sharing, identity management, and interfacing with legacy telephone systems including support for sending dtmf (touch-tone dialing) signals.

Fundamentals of WebXR - Web APIs
basic concepts before getting into too much detail, let's consider some basic concepts that you need to know before you learn how to develop xr code.

Geometry and reference spaces in WebXR - Web APIs
however, in order to provide the ability to present scenes in true 3d using xr headsets and other such equipment, webxr has additional concepts that must be understood.

Lighting a WebXR setting - Web APIs
because the webxr device api relies on other technologies—namely, webgl and frameworks based upon it—to perform all rendering, texturing, and lighting of a scene, the same general lighting concepts apply to webxr settings or scenes as to any other webgl-generated display.

Spaces and reference spaces: Spatial tracking in WebXR - Web APIs
note: this article presumes that you are familiar with the concepts introduced in geometry and reference spaces in webxr: that is, the basics of 3d coordinate systems, as well as webxr spaces, reference spaces, and how reference spaces are used to create local coordinate systems for individual objects or movable components within a scene.

Using the Web Audio API - Web APIs
we'll briefly look at some concepts, then study a simple boombox example that allows us to load an audio track, play and pause it, and change its volume and stereo panning.

Visualizations with Web Audio API - Web APIs
basic concepts to extract data from your audio source, you need an analysernode, which is created using the audiocontext.createanalyser() method, for example: var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); var analyser = audioctx.createanalyser(); this node is then connected to your audio source at some point between your source and your destination, for example: source = audioctx.createmediastreamsourc...

Web Authentication API - Web APIs
web authentication concepts and usage the web authentication api (also referred to as webauthn) uses asymmetric (public-key) cryptography instead of passwords or sms texts for registering, authenticating, and second-factor authentication with websites.

Web Budget API - Web APIs
concepts and usage tbd interfaces budgetservice provides a programmatic interface to the user agent’s budget service.

Web Locks API - Web APIs
web locks concepts and usage a lock is an abstract concept representing some potentially shared resource, identified by a name chosen by the web app.

Web Speech API - Web APIs
the web speech api has two parts: speechsynthesis (text-to-speech), and speechrecognition (asynchronous speech recognition.) web speech concepts and usage the web speech api makes web apps able to handle voice data.

Using the Web Storage API - Web APIs
basic concepts storage objects are simple key-value stores, similar to objects, but they stay intact through page loads.

Web Storage API - Web APIs
web storage concepts and usage the two mechanisms within web storage are as follows: sessionstorage maintains a separate storage area for each given origin that's available for the duration of the page session (as long as the browser is open, including page reloads and restores) stores data only for a session, meaning that the data is stored until the browser (or tab) is closed.

Using Web Workers - Web APIs
this example is rather trivial, but we decided to keep it simple while introducing you to basic worker concepts.

Web Workers API - Web APIs
web workers concepts and usage a worker is an object created using a constructor (e.g.

Cognitive accessibility - Accessibility
others may prefer to explore the site in a sequential manner, moving from page to page in order to best understand the site's layout, content, and concepts.

Accessibility documentation index - Accessibility
105 web accessibility for seizures and physical reactions media queries, peat, photosensitve epilepsy analysis tool, the harding test, color, epilepsy, musicogenic seizures, photosensitivity, prefers-reduced-motion, reflex epilepsy, saturation, seizure disorders, seizures, web animation this article introduces concepts behind making web content accessibile for those with vestibular disorders, and how to measure and prevent content leading to seizures and / or other physical reactions.

Web accessibility for seizures and physical reactions - Accessibility
this article introduces concepts behind making web content accessibile for those with vestibular disorders, and how to measure and prevent content leading to seizures and / or other physical reactions.

Alternative style sheets - CSS: Cascading Style Sheets
working draft the css om specification defines the concepts of the style sheet set name, its disabled flag, and the preferred css style sheet set name.

CSS Multi-column Layout - CSS: Cascading Style Sheets
reference multiple-column layout properties column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns related css fragmentation properties break-after break-before break-inside orphans widows guides basic concepts of multicol an overview of the multiple-column layout specification styling columns how to use column rules and manage the spacing between columns.

CSS Containment - CSS: Cascading Style Sheets
key concepts and terminology this specification defines only one property, the contain property.

CSS Display - CSS: Cascading Style Sheets
css properties display css data types <display-outside> <display-inside> <display-listitem> <display-box> <display-internal> <display-legacy> guides css flow layout (display: block, display: inline) block and inline layout in normal flow flow layout and overflow flow layout and writing modes formatting contexts explained in flow and out of flow display: flex basic concepts of flexbox aligning items in a flex container controlling ratios of flex items along the main axis cross-browser flexbox mixins mastering wrapping of flex items ordering flex items relationship of flexbox to other layout methods backwards compatibility of flexbox typical use cases of flexbox display: grid basic concepts of grid layout relationship to other layout methods line-based...

CSS Flexible Box Layout - CSS: Cascading Style Sheets
justify-content align-content align-items align-self place-content place-items row-gap column-gap gap glossary entries flexbox flex container flex item main axis cross axis flex guides basic concepts of flexbox an overview of the features of flexbox relationship of flexbox to other layout methods how flexbox relates to other layout methods, and other css specifications aligning items in a flex container how the box alignment properties work with flexbox.

Line-based placement with CSS Grid - CSS: Cascading Style Sheets
in the article covering the basic concepts of grid layout, we started to look at how to position items on a grid using line numbers.

CSS Grid Layout - CSS: Cascading Style Sheets
auto-columns grid-auto-rows grid-auto-flow grid grid-row-start grid-column-start grid-row-end grid-column-end grid-row grid-column grid-area row-gap column-gap gap css functions repeat() minmax() fit-content() css data types <flex> glossary entries grid grid lines grid tracks grid cell grid area gutters grid axis grid row grid column guides basic concepts of grid layout relationship of grid layout to other layout methods layout using line-based placement grid template areas layout using named grid lines auto-placement in css grid layout box alignment in css grid layout css grid, logical values and writing modes css grid layout and accessibility css grid and progressive enhancement realising common layouts using css grid subgrid exter...

CSS Logical Properties and Values - CSS: Cascading Style Sheets
rflow-block overflow-inline overscroll-behavior-block overscroll-behavior-inline resize (block and inline keywords) text-align (end and start keywords) deprecated properties offset-block-end (now inset-block-end ) offset-block-start (now inset-block-start ) offset-inline-end (now inset-inline-end ) offset-inline-start (now inset-inline-start ) guides basic concepts of logical properties and values logical properties for sizing logical properties for margins, borders and padding logical properties for floating and positioning specifications specification status comment css logical properties and values level 1 editor's draft initial definition.

CSS Scroll Snap - CSS: Cascading Style Sheets
nline-end scroll-padding-block scroll-padding-block-start scroll-padding-block-end css properties on children scroll-snap-align scroll-margin scroll-margin-top scroll-margin-right scroll-margin-bottom scroll-margin-left scroll-margin-inline scroll-margin-inline-start scroll-margin-inline-end scroll-margin-block scroll-margin-block-start scroll-margin-block-end guides basic concepts of css scroll snap browser compatibility and scroll snap specification specification status comment css scroll snap module level 1 candidate recommendation initial definition ...

Inline formatting context - CSS: Cascading Style Sheets
this article explains the inline formatting context core concepts the inline formatting context is part of the visual rendering of a web page.

Shorthand properties - CSS: Cascading Style Sheets
see also css key concepts: css syntax, at-rule, comments, specificity and inheritance, the box, layout modes and visual formatting models, and margin collapsing, or the initial, computed, resolved, specified, used, and actual values.

Visual formatting model - CSS: Cascading Style Sheets
in this document we define the model and introduce some of the related terms and concepts, linking to more specific pages on mdn for further details.

<display-box> - CSS: Cascading Style Sheets
please note that the css display level 3 spec defines how the contents value should affect "unusual elements" — elements that aren’t rendered purely by css box concepts such as replaced elements.

Inheritance - CSS: Cascading Style Sheets
see also css values for controlling inheritance: inherit, initial, unset, and revert introducing the css cascade cascade and inheritance css key concepts: css syntax, at-rule, comments, specificity and inheritance, the box, layout modes and visual formatting models, and margin collapsing, or the initial, computed, resolved, specified, used, and actual values.

CSS: Cascading Style Sheets
css key concepts: the syntax and forms of the language specificity, inheritance and the cascade css units and values box model and margin collapse the containing block stacking and block-formatting contexts initial, computed, used, and actual values css shorthand properties css flexible box layout css grid layout media queries animation cookbook the css layout cookbo...

Ajax - Developer guides
see also ajax: a new approach to web applications jesse james garrett, of adaptive path, wrote this article in february 2005, introducing ajax and its related concepts.

Block formatting context - Developer guides
see also float, clear css key concepts: css syntax, at-rule, comments, specificity and inheritance, the box, layout modes and visual formatting models, and margin collapsing, or the initial, computed, resolved, specified, used, and actual values.

HTML5 - Developer guides
the term represents two different concepts.

Applying color to HTML elements using CSS - HTML: Hypertext Markup Language
a couple of useful resources about color theory: color science (khan academy in association with pixar) an online course which introduces concepts such as what color is, how it's percieved, and how to use colors to express ideas.

<abbr>: The Abbreviation element - HTML: Hypertext Markup Language
example <p>javascript object notation (<abbr>json</abbr>) is a lightweight data-interchange format.</p> this is especially helpful for people who are unfamiliar with the terminology or concepts discussed in the content, people who are new to the language, and people with cognitive concerns.

HTML: Hypertext Markup Language
introduction to html this module sets the stage, getting you used to important concepts and syntax such as looking at applying html to text, how to create hyperlinks, and how to use html to structure a web page.

Feature Policy - HTTP
concepts and usage feature policy allows you to control which origins can use which features, both in the top-level page and in embedded frames.

About JavaScript - JavaScript
the basic syntax is intentionally similar to both java and c++ to reduce the number of new concepts required to learn the language.

Concurrency model and the event loop - JavaScript
runtime concepts the following sections explain a theoretical model.

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.

JavaScript technologies overview - JavaScript
layered above the abstract concepts defined in dom core, html also defines the meaning of elements.

Memory Management - JavaScript
this section will explain the concepts that are necessary for understanding the main garbage collection algorithms and their respective limitations.

Examples - MathML
below you'll find some examples you can look at to help you to understand how to use mathml to display increasingly complex mathematical concepts in web content.

MathML documentation index - MathML
3 examples beginner, example, guide, mathml, needsbeginnerupdate below you'll find some examples you can look at to help you to understand how to use mathml to display increasingly complex mathematical concepts in web content.

Making PWAs work offline with Service workers - Progressive web apps (PWAs)
be sure to check out our further documentation if you want to learn more about the concepts behind the service worker api and how to use it in more detail.

Mobile first - Progressive web apps (PWAs)
a simple example to demonstrate the concepts, i wanted to cover in this article, i created a very simple app containing a nav menu, heading and single column of text.

Progressive web apps (PWAs)
be sure to check out our further documentation if you want to learn more about the concepts behind the service worker api and how to use it in more detail.

Paths - SVG: Scalable Vector Graphics
this interactive demo might help understand the concepts behind svg arcs: http://codepen.io/lingtalfi/pen/yalwjg (tested in chrome and firefox only, might not work in your browser) « previousnext » ...

Information Security Basics - Web security
describes the primary security objectives, which are absolutely fundamental to understanding security security controls defines major categories of security controls and discusses their potential disadvantages tcp/ip security an overview of the tcp/ip model, with a focus on the security considerations for ssl threats briefly introduces major threat concepts vulnerabilities defines the major categories of vulnerabilities and discusses the presence of vulnerabilities in all software ...

Tutorials
html tutorials introductory level introduction to html this module sets the stage, getting you used to important concepts and syntax, looking at applying html to text, how to create hyperlinks, and how to use html to structure a webpage.

Web Components
concepts and usage as developers, we all know that reusing code as much as possible is a good idea.

XPath
this extensive introduction to xslt and xpath assumes no prior knowledge of the technologies, and guides the reader through background, context, structure, concepts, and introductory terminology.

Index - XSLT: Extensible Stylesheet Language Transformations
14 an overview needshelp, needsmarkupwork, transforming_xml_with_xslt, xml, xslt the extensible stylesheet language/transform is a very powerful language, and a complete discussion of it is well beyond the scope of this article, but a brief discussion of some basic concepts will be helpful in understanding the description of netscape's capabilities that follows.

An Overview - XSLT: Extensible Stylesheet Language Transformations
« transforming xml with xslt the extensible stylesheet language/transform is a very powerful language, and a complete discussion of it is well beyond the scope of this article, but a brief discussion of some basic concepts will be helpful in understanding the description of netscape's capabilities that follows.

Resources - XSLT: Extensible Stylesheet Language Transformations
msdn: xslt concepts ...

Index - WebAssembly
12 webassembly concepts c, c++, emscripten, javascript, webassembly, concepts, rust, text format, web platform this article has given you an explanation of what webassembly is, why it is so useful, how it fits into the web, and how you can make use of it.

WebAssembly
guides webassembly concepts get started by reading the high-level concepts behind webassembly — what it is, why it is so useful, how it fits into the web platform (and beyond), and how to use it.