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mdn-browser-compat-data

https://github.com/mdn/browser-compat-data

This repository contains compatibility data for Web technologies. Browser compatibility data describes which platforms (where "platforms" are usually, but not always, web browsers) support particular Web APIs.

This data can be used in documentation, to build compatibility tables listing browser support for APIs. For example: Browser support for WebExtension APIs.

npmBuild StatusTwitter Follow

Read how this project is governed.

Installation

You can install mdn-browser-compat-data as a node package.

npm install mdn-browser-compat-data

Usage

constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)

Repository contents

There's a top-level directory for each broad area covered: for example, "http", "javascript", "webextensions". Inside each of these directories is one or more JSON file containing the compatibility data.

Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.

  • api/ contains data for each Web API interface.

  • css/ contains data for CSS properties, selectors, and at-rules.

  • html/ contains data for HTML elements, attributes, and global attributes.

  • http/ contains data for HTTP headers, statuses, and methods.

  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.

  • mathml/ contains data for MathML elements, attributes, and global attributes.

  • svg/ contains data for SVG elements, attributes, and global attributes.

  • webdriver/ contains data for WebDriver commands.

  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.

  • xpath/ contains data for XPath axes, and functions.

  • xslt/ contains data for XSLT elements, attributes, and global attributes.

Format of the browser compat json files

The definitive description of the format used to represent compatibility data is the schema file. You can also have a look at the schema documentation.

Please note that we do not (yet) guarantee the stability of the data format. You're welcome to use the data, but its structure is subject to change without notice.

Issues?

If you find a problem, please file a bug.

Contributing

We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.

Projects using the data

Here are some projects using the data, as an npm module or directly:

  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.

About

This repository contains compatibility data for Web technologies as displayed on MDN

developer.mozilla.org

Resources

Readme
CC0-1.0 license

Code of conduct

Code of conduct

Contributing

Contributing
Activity
Custom properties

Stars

0 stars

Watchers

0 watching

Forks

0 forks
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
Repository files navigation
mdn-browser-compat-data
https://github.com/mdn/browser-compat-data
This repository contains compatibility data for Web technologies.
Browser compatibility data describes which platforms (where "platforms" are
usually, but not always, web browsers) support particular Web APIs.
This data can be used in documentation, to build compatibility tables listing
browser support for APIs. For example:
Browser support for WebExtension APIs.
npmBuild StatusTwitter Follow
Read how this project is governed.
Installation
You can install mdn-browser-compat-data as a node package.
npm install mdn-browser-compat-data

Usage
constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)
Repository contents
There's a top-level directory for each broad area covered: for example, "http",
"javascript", "webextensions". Inside each of these directories is one or more
JSON file containing the compatibility data.
Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.
  • api/ contains data for each Web API interface.
  • css/ contains data for CSS properties, selectors, and at-rules.
  • html/ contains data for
HTML elements, attributes, and global attributes.
  • http/ contains data for HTTP headers, statuses, and methods.
  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.
  • mathml/ contains data for MathML elements, attributes, and global attributes.
  • svg/ contains data for SVG elements, attributes, and global attributes.
  • webdriver/ contains data for WebDriver commands.
  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.
  • xpath/ contains data for XPath axes, and functions.
  • xslt/ contains data for XSLT elements, attributes, and global attributes.
Format of the browser compat json files
The definitive description of the format used to represent compatibility data is the schema file.
You can also have a look at the schema documentation.
Please note that we do not (yet) guarantee the stability of the data format.
You're welcome to use the data, but its structure is subject to change without notice.
Issues?
If you find a problem, please file a bug.
Contributing
We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.
Projects using the data
Here are some projects using the data, as an npm module or directly:
  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.
About
This repository contains compatibility data for Web technologies as displayed on MDN
developer.mozilla.org
Resources
Readme
CC0-1.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
mdn-browser-compat-data
https://github.com/mdn/browser-compat-data
This repository contains compatibility data for Web technologies.
Browser compatibility data describes which platforms (where "platforms" are
usually, but not always, web browsers) support particular Web APIs.
This data can be used in documentation, to build compatibility tables listing
browser support for APIs. For example:
Browser support for WebExtension APIs.
npmBuild StatusTwitter Follow
Read how this project is governed.
Installation
You can install mdn-browser-compat-data as a node package.
npm install mdn-browser-compat-data

Usage
constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)
Repository contents
There's a top-level directory for each broad area covered: for example, "http",
"javascript", "webextensions". Inside each of these directories is one or more
JSON file containing the compatibility data.
Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.
  • api/ contains data for each Web API interface.
  • css/ contains data for CSS properties, selectors, and at-rules.
  • html/ contains data for
HTML elements, attributes, and global attributes.
  • http/ contains data for HTTP headers, statuses, and methods.
  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.
  • mathml/ contains data for MathML elements, attributes, and global attributes.
  • svg/ contains data for SVG elements, attributes, and global attributes.
  • webdriver/ contains data for WebDriver commands.
  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.
  • xpath/ contains data for XPath axes, and functions.
  • xslt/ contains data for XSLT elements, attributes, and global attributes.
Format of the browser compat json files
The definitive description of the format used to represent compatibility data is the schema file.
You can also have a look at the schema documentation.
Please note that we do not (yet) guarantee the stability of the data format.
You're welcome to use the data, but its structure is subject to change without notice.
Issues?
If you find a problem, please file a bug.
Contributing
We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.
Projects using the data
Here are some projects using the data, as an npm module or directly:
  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.
About
This repository contains compatibility data for Web technologies as displayed on MDN
developer.mozilla.org
Resources
Readme
CC0-1.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
mdn-browser-compat-data
https://github.com/mdn/browser-compat-data
This repository contains compatibility data for Web technologies.
Browser compatibility data describes which platforms (where "platforms" are
usually, but not always, web browsers) support particular Web APIs.
This data can be used in documentation, to build compatibility tables listing
browser support for APIs. For example:
Browser support for WebExtension APIs.
npmBuild StatusTwitter Follow
Read how this project is governed.
Installation
You can install mdn-browser-compat-data as a node package.
npm install mdn-browser-compat-data

Usage
constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)
Repository contents
There's a top-level directory for each broad area covered: for example, "http",
"javascript", "webextensions". Inside each of these directories is one or more
JSON file containing the compatibility data.
Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.
  • api/ contains data for each Web API interface.
  • css/ contains data for CSS properties, selectors, and at-rules.
  • html/ contains data for
HTML elements, attributes, and global attributes.
  • http/ contains data for HTTP headers, statuses, and methods.
  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.
  • mathml/ contains data for MathML elements, attributes, and global attributes.
  • svg/ contains data for SVG elements, attributes, and global attributes.
  • webdriver/ contains data for WebDriver commands.
  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.
  • xpath/ contains data for XPath axes, and functions.
  • xslt/ contains data for XSLT elements, attributes, and global attributes.
Format of the browser compat json files
The definitive description of the format used to represent compatibility data is the schema file.
You can also have a look at the schema documentation.
Please note that we do not (yet) guarantee the stability of the data format.
You're welcome to use the data, but its structure is subject to change without notice.
Issues?
If you find a problem, please file a bug.
Contributing
We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.
Projects using the data
Here are some projects using the data, as an npm module or directly:
  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.
About
This repository contains compatibility data for Web technologies as displayed on MDN
developer.mozilla.org
Resources
Readme
CC0-1.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
mdn-browser-compat-data
https://github.com/mdn/browser-compat-data
This repository contains compatibility data for Web technologies.
Browser compatibility data describes which platforms (where "platforms" are
usually, but not always, web browsers) support particular Web APIs.
This data can be used in documentation, to build compatibility tables listing
browser support for APIs. For example:
Browser support for WebExtension APIs.
npmBuild StatusTwitter Follow
Read how this project is governed.
Installation
You can install mdn-browser-compat-data as a node package.
npm install mdn-browser-compat-data

Usage
constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)
Repository contents
There's a top-level directory for each broad area covered: for example, "http",
"javascript", "webextensions". Inside each of these directories is one or more
JSON file containing the compatibility data.
Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.
  • api/ contains data for each Web API interface.
  • css/ contains data for CSS properties, selectors, and at-rules.
  • html/ contains data for
HTML elements, attributes, and global attributes.
  • http/ contains data for HTTP headers, statuses, and methods.
  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.
  • mathml/ contains data for MathML elements, attributes, and global attributes.
  • svg/ contains data for SVG elements, attributes, and global attributes.
  • webdriver/ contains data for WebDriver commands.
  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.
  • xpath/ contains data for XPath axes, and functions.
  • xslt/ contains data for XSLT elements, attributes, and global attributes.
Format of the browser compat json files
The definitive description of the format used to represent compatibility data is the schema file.
You can also have a look at the schema documentation.
Please note that we do not (yet) guarantee the stability of the data format.
You're welcome to use the data, but its structure is subject to change without notice.
Issues?
If you find a problem, please file a bug.
Contributing
We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.
Projects using the data
Here are some projects using the data, as an npm module or directly:
  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.
About
This repository contains compatibility data for Web technologies as displayed on MDN
developer.mozilla.org
Resources
Readme
CC0-1.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
mdn-browser-compat-data
https://github.com/mdn/browser-compat-data
This repository contains compatibility data for Web technologies.
Browser compatibility data describes which platforms (where "platforms" are
usually, but not always, web browsers) support particular Web APIs.
This data can be used in documentation, to build compatibility tables listing
browser support for APIs. For example:
Browser support for WebExtension APIs.
npmBuild StatusTwitter Follow
Read how this project is governed.
Installation
You can install mdn-browser-compat-data as a node package.
npm install mdn-browser-compat-data

Usage
constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)
Repository contents
There's a top-level directory for each broad area covered: for example, "http",
"javascript", "webextensions". Inside each of these directories is one or more
JSON file containing the compatibility data.
Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.
  • api/ contains data for each Web API interface.
  • css/ contains data for CSS properties, selectors, and at-rules.
  • html/ contains data for
HTML elements, attributes, and global attributes.
  • http/ contains data for HTTP headers, statuses, and methods.
  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.
  • mathml/ contains data for MathML elements, attributes, and global attributes.
  • svg/ contains data for SVG elements, attributes, and global attributes.
  • webdriver/ contains data for WebDriver commands.
  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.
  • xpath/ contains data for XPath axes, and functions.
  • xslt/ contains data for XSLT elements, attributes, and global attributes.
Format of the browser compat json files
The definitive description of the format used to represent compatibility data is the schema file.
You can also have a look at the schema documentation.
Please note that we do not (yet) guarantee the stability of the data format.
You're welcome to use the data, but its structure is subject to change without notice.
Issues?
If you find a problem, please file a bug.
Contributing
We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.
Projects using the data
Here are some projects using the data, as an npm module or directly:
  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.
About
This repository contains compatibility data for Web technologies as displayed on MDN
developer.mozilla.org
Resources
Readme
CC0-1.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Custom properties
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Watchers
0 watching
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0 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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mdn-browser-compat-data
https://github.com/mdn/browser-compat-data
This repository contains compatibility data for Web technologies.
Browser compatibility data describes which platforms (where "platforms" are
usually, but not always, web browsers) support particular Web APIs.
This data can be used in documentation, to build compatibility tables listing
browser support for APIs. For example:
Browser support for WebExtension APIs.
npmBuild StatusTwitter Follow
Read how this project is governed.
Installation
You can install mdn-browser-compat-data as a node package.
npm install mdn-browser-compat-data

Usage
constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)
Repository contents
There's a top-level directory for each broad area covered: for example, "http",
"javascript", "webextensions". Inside each of these directories is one or more
JSON file containing the compatibility data.
Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.
  • api/ contains data for each Web API interface.
  • css/ contains data for CSS properties, selectors, and at-rules.
  • html/ contains data for
HTML elements, attributes, and global attributes.
  • http/ contains data for HTTP headers, statuses, and methods.
  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.
  • mathml/ contains data for MathML elements, attributes, and global attributes.
  • svg/ contains data for SVG elements, attributes, and global attributes.
  • webdriver/ contains data for WebDriver commands.
  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.
  • xpath/ contains data for XPath axes, and functions.
  • xslt/ contains data for XSLT elements, attributes, and global attributes.
Format of the browser compat json files
The definitive description of the format used to represent compatibility data is the schema file.
You can also have a look at the schema documentation.
Please note that we do not (yet) guarantee the stability of the data format.
You're welcome to use the data, but its structure is subject to change without notice.
Issues?
If you find a problem, please file a bug.
Contributing
We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.
Projects using the data
Here are some projects using the data, as an npm module or directly:
  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.
About
This repository contains compatibility data for Web technologies as displayed on MDN
developer.mozilla.org
Resources
Readme
CC0-1.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
mdn-browser-compat-data
https://github.com/mdn/browser-compat-data
This repository contains compatibility data for Web technologies.
Browser compatibility data describes which platforms (where "platforms" are
usually, but not always, web browsers) support particular Web APIs.
This data can be used in documentation, to build compatibility tables listing
browser support for APIs. For example:
Browser support for WebExtension APIs.
npmBuild StatusTwitter Follow
Read how this project is governed.
Installation
You can install mdn-browser-compat-data as a node package.
npm install mdn-browser-compat-data

Usage
constbcd=require('mdn-browser-compat-data');bcd.css.properties.background;// returns a compat data object (see schema)
Repository contents
There's a top-level directory for each broad area covered: for example, "http",
"javascript", "webextensions". Inside each of these directories is one or more
JSON file containing the compatibility data.
Please note that we have not (yet) migrated all compatibility data from the MDN wiki pages into this repository.
  • api/ contains data for each Web API interface.
  • css/ contains data for CSS properties, selectors, and at-rules.
  • html/ contains data for
HTML elements, attributes, and global attributes.
  • http/ contains data for HTTP headers, statuses, and methods.
  • javascript/ contains data for JavaScript built-in Objects, statement, operators, and other ECMAScript language features.
  • mathml/ contains data for MathML elements, attributes, and global attributes.
  • svg/ contains data for SVG elements, attributes, and global attributes.
  • webdriver/ contains data for WebDriver commands.
  • webextensions/ contains data for WebExtensions JavaScript APIs and manifest keys.
  • xpath/ contains data for XPath axes, and functions.
  • xslt/ contains data for XSLT elements, attributes, and global attributes.
Format of the browser compat json files
The definitive description of the format used to represent compatibility data is the schema file.
You can also have a look at the schema documentation.
Please note that we do not (yet) guarantee the stability of the data format.
You're welcome to use the data, but its structure is subject to change without notice.
Issues?
If you find a problem, please file a bug.
Contributing
We're very happy to accept contributions to this data. See Contributing to browser-compat-data for more information.
Projects using the data
Here are some projects using the data, as an npm module or directly:
  • Add-ons Linter - the Add-ons Linter is used on addons.mozilla.org and the web-ext tool. It uses browser-compat-data to check that the Firefox version that the add-on lists support for does in fact support the APIs used by the add-on.
  • Browser Compatibility Data Explorer - View, search, and visualize data from the compatibility dataset.
  • caniuse - In addition to the existing caniuse database, caniuse includes features from the MDN BCD project, formatted and interactive like any other caniuse support table.
  • Compat Report - Firefox Add-on that shows compatibility data for the current site in the developer tools.
  • compat-tester - Scan local documents for compatibility issues.
  • Visual Studio Code - Shows the compatibility information in the code completion popup.
  • webhint.io - Hints to check if your CSS HTML and JavaScript have deprecated or not broadly supported features.
  • WebStorm - JavaScript IDE allowing you to check whether all CSS properties you use are supported in the target browser version.
About
This repository contains compatibility data for Web technologies as displayed on MDN
developer.mozilla.org
Resources
Readme
CC0-1.0 license
Code of conduct
Code of conduct
Contributing
Contributing
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages