npmpackage.info

Gathering detailed insights and metrics for @mdn/browser-compat-data

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Gathering detailed insights and metrics for @mdn/browser-compat-data

@mdn/browser-compat-data - 6.0.31 | npmpackage.info

@mdn/browser-compat-data

Browser compatibility data for Web technologies as displayed on MDN

6.0.31

5,312

CC0-1.0

JSON

16.05 MB

5.9

Installations

npm install @mdn/browser-compat-data

Developer Guide

BETA

Typescript

Yes

Module System

CommonJS, ESM

Node Version

22.17.0

NPM Version

10.9.2 Pull Requests

Open

32

Total

19,888

Closed

1,388

Merged

18,468

Issues

Open

426

Total

5,703

Closed

5,277

Releases

427

v6.0.31

Updated on Jul 11, 2025

v6.0.30

Updated on Jul 08, 2025

v6.0.29

Updated on Jul 04, 2025

v6.0.28

Updated on Jul 01, 2025

v6.0.27

Updated on Jun 27, 2025

v6.0.26

Updated on Jun 24, 2025

View All 427 releases

Languages

JSON

TypeScript

JavaScript

JSON (98.18%)

TypeScript (1.81%)

JavaScript (0.02%)

Developer

mdn

Download Statistics

Total Downloads

Last Day

Last Week

Last Month

Last Year

GitHub Statistics

CC0-1.0 License

5,312 Stars

19,205 Commits

2,223 Forks

255 Watchers

27 Branches

1,108 Contributors

Updated on Jul 12, 2025

Maintainers

View All 1,108 Contributors

Package Meta Information

Latest Version

6.0.31

Package Id

@mdn/browser-compat-data@6.0.31

Unpacked Size

16.05 MB

Size

785.83 kB

File Count

NPM Version

10.9.2

Node Version

22.17.0

Published on

Jul 11, 2025

Total Downloads

Cumulative downloads

Total Downloads

NaN

Last Day

NaN

Compared to previous day

Last Week

NaN

Compared to previous week

Last Month

NaN

Compared to previous month

Last Year

NaN

Compared to previous year

Weekly Downloads

Monthly Downloads

Yearly Downloads

No dependencies detected.

`@mdn/browser-compat-data`

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

The browser-compat-data ("BCD") project contains machine-readable browser (and JavaScript runtime) compatibility data for Web technologies, such as Web APIs, JavaScript features, CSS properties and more. Our goal is to document accurate compatibility data for Web technologies, so web developers may write cross-browser compatible websites easier. BCD is used in web apps and software such as MDN Web Docs, CanIUse, Visual Studio Code, WebStorm and more.

Read how this project is governed.

Chat with us on Matrix at chat.mozilla.org#mdn!

Are you interested in contributing to this project? Check out the Contributing to browser-compat-data documentation.

[!TIP] Looking for something? Consult the alphabetical index of the project documentation.

Installation and Import

NodeJS

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

1npm install @mdn/browser-compat-data
2# ...or...
3yarn add @mdn/browser-compat-data

Then, you can import BCD into your project with either import or require():

1// ESM with Import Attributes (NodeJS 20+)
2import bcd from '@mdn/browser-compat-data' with { type: 'json' };
3// ...or...
4const { default: bcd } = await import('@mdn/browser-compat-data', {
5  with: { type: 'json' },
6});
7
8// ...or...
9
10// ESM with Import Assertions (NodeJS 16+)
11import bcd from '@mdn/browser-compat-data' assert { type: 'json' };
12// ...or...
13const { default: bcd } = await import('@mdn/browser-compat-data', {
14  assert: { type: 'json' },
15});
16
17// ...or...
18
19// ESM Wrapper for older NodeJS versions (NodeJS v12+)
20import bcd from '@mdn/browser-compat-data/forLegacyNode';
21// ...or...
22const { default: bcd } = await import('@mdn/browser-compat-data/forLegacyNode');
23
24// ...or...
25
26// CommonJS Module (Any NodeJS)
27const bcd = require('@mdn/browser-compat-data');

Deno/Browsers

You can import @mdn/browser-compat-data using a CDN.

1// ESM with Import Attributes (Deno 1.37+)
2import bcd from 'https://unpkg.com/@mdn/browser-compat-data' with { type: 'json' };
3// ...or...
4const { default: bcd } = await import(
5  'https://unpkg.com/@mdn/browser-compat-data',
6  {
7    with: { type: 'json' },
8  }
9);
10
11// ...or...
12
13// ESM with Import Assertions (Deno 1.17+)
14import bcd from 'https://unpkg.com/@mdn/browser-compat-data' assert { type: 'json' };
15// ...or...
16const { default: bcd } = await import(
17  'https://unpkg.com/@mdn/browser-compat-data',
18  {
19    assert: { type: 'json' },
20  }
21);
22
23// ...or...
24
25// Fetch Method (Deno 1.0+)
26const bcd = await fetch('https://unpkg.com/@mdn/browser-compat-data').then(
27  (response) => response.json(),
28);

Other Languages

You can obtain the raw compatibility data for @mdn/browser-compat-data using a CDN and loading the data.json file included in releases.

1https://unpkg.com/@mdn/browser-compat-data/data.json

Usage

Once you have imported BCD, you can access the compatibility data for any feature by accessing the properties of the dictionary.

1// Grab the desired support statement
2const support = bcd.css.properties.background.__compat;
3// returns a compat data object (see schema)
4
5// You may use any syntax to obtain dictionary items
6const support = bcd['api']['Document']['body']['__compat'];

Package contents

The @mdn/browser-compat-data package contains a tree of objects, with support and browser data objects at their leaves. There are over 15,000 features in the dataset; this documentation highlights significant portions, but many others exist at various levels of the tree.

The definitive description of the format used to represent individual features and browsers is the schema definitions.

Apart from the explicitly documented objects below, feature-level support data may change at any time. See Semantic versioning policy for details.

The package contains the following top-level objects:

`__meta`

An object containing the following package metadata:

version - the package version
timestamp - the timestamp of when the package version was built

`api`

Data for Web API features.

`browsers`

Data for browsers and JavaScript runtimes. See the browser schema for details.

`css`

Data for CSS features, including:

at-rules - at-rules (e.g. @media)
properties - Properties (e.g. background, color, font-variant)
selectors - Selectors (such as basic selectors, combinators, or pseudo elements)
types - Value types for rule values

`html`

Data for HTML features, including:

elements - Elements
global_attributes - Global attributes

`http`

Data for HTTP features, including:

headers - Request and response headers
methods - Request methods
status - Status codes

`javascript`

Data for JavaScript language features, including:

builtins - Built-in objects
classes - Class definition features
functions - Function features
grammar - Language grammar
operators - Mathematical and logical operators
statements - Language statements and expressions

`manifests`

webapp - Web App manifest keys

`mathml`

Data for MathML features, including:

elements - Elements

`svg`

Data for SVG features, including:

attributes - Attributes
elements - Elements

`webassembly`

Data for WebAssembly features.

`webdriver`

Data for WebDriver features, including:

bidi - WebDriver BiDi protocol
classic - WebDriver Classic protocol

`webextensions`

Data for WebExtensions features, including:

api - WebExtension-specific APIs
manifest - manifest.json keys

Semantic versioning policy

For the purposes of semantic versioning (SemVer), the public API consists of:

The high-level namespace objects documented in Package contents
The schema definitions for browser and support data structures
The TypeScript definitions

The details of browser compatibility change frequently, as browsers ship new features, standards organizations revise specifications, and Web developers discover new bugs. We routinely publish updates to the package to reflect these changes.

You should expect lower-level namespaces, feature data, and browser data to be added, removed, or modified at any time. That said, we strive to communicate changes and preserve backward compatibility; if you rely on a currently undocumented portion of the package and want SemVer to apply to it, please open an issue.

What isn't tracked?

Now that you know what this project is, let's mention what this project isn't. This project is not:

An extensive description of every possible detail about a feature in a browser. We do not track UI changes, irrelevant features or irrelevant flag data.
A source for custom features added by web frameworks (e.g. React, Vue) or corporate runtimes (e.g. AWS Lambda, Azure Functions).
A documentation of screen reader compatibility; for screen reader compatibility, check out https://a11ysupport.io/ instead.
The location where Baseline data is hosted; while Baseline pulls from BCD, the Baseline data is managed by the W3C WebDX Community Group on their own GitHub repo.

Issues?

If you find a problem with the compatibility data (such as incorrect version numbers) or there is a new web feature you think we should document, please file a bug.

Contributing

Thank you for your interest in contributing to this project! 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 - NPM package that checks add-ons for features that aren't supported by the targeted Firefox version. Used by addons.mozilla.org and the web-ext tool.
ast-metadata-inferer - NPM package that annotates JavaScript AST nodes with metadata derived from BCD data. Used by eslint-plugin-compat.
BCD Watch - Website that shows a weekly report of BCD changes.
caniuse - Website that shows browser support tables based on caniuse and BCD data.
caniuse-lite - NPM package that republishes BCD data in the caniuse format.
CanIUse Embed - Service that allows embedding caniuse (including BCD data) into any website.
css-declaration-sorter - NPM package that sorts CSS properties alphabetically.
csstype - NPM package that publishes strict TypeScript/Flow types for CSS.
Compat Report - Firefox Add-on that shows BCD data for the current site in the developer tools.
compat-tester - NPM package that scans HTML, CSS and JS files for compatibility issues.
JetBrains WebStorm - IDE that uses BCD data to check browser support of used CSS properties (see 2019.1 releasenotes) by generating feature lists with support data.
JSR - Package registry that uses BCD data to generate a list of web builtins.
Mozilla Firefox - Web browser that uses BCD data in the DevTools to show CSS property compatibility data mapped against a list of non-retired browsers.
TypeScript - Programming language that uses BCD data to generate DOM typings.
Visual Studio Code - IDE that uses BCD to show compatibility information for CSS features (see VSCode 1.25 release notes), and to extract MDN urls for HTML elements.
web-features - NPM package that publishes web feature groups with Baseline statuses based on BCD data.
web-features-explorer - Website that visualizes web features by Baseline status and month.
webhint.io - Tool that uses BCD to checks CSS and HTML for unsupported features (see @hint/utils-compat-data package).

Acknowledgments

Thanks to:

The BrowserStack Open Source Program for testing services

Sauce Labs Open Source for testing services

LambdaTest Open Source for testing services

No vulnerabilities found.

10

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

10

Maintained

Determines if the project is "actively maintained".

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

License

Determines if the project has defined a license.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

10

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

6

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

Reason

dependency not pinned by hash detected -- score normalized to 6

Details

Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/add-push-artifacts.yml:14: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/add-push-artifacts.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/add-push-artifacts.yml:17: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/add-push-artifacts.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/add-push-artifacts.yml:24: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/add-push-artifacts.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/add-push-artifacts.yml:28: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/add-push-artifacts.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/auto-merge.yml:14: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/auto-merge.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/issue-regex-labeler.yml:15: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/issue-regex-labeler.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/labeler.yml:14: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/labeler.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/node.js.yml:16: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/node.js.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/node.js.yml:17: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/node.js.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/pr-rebase-needed.yml:17: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/pr-rebase-needed.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/pr-review-companion.yml:23: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/pr-review-companion.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/pr-review-companion.yml:28: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/pr-review-companion.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/release-pr.yml:28: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/release-pr.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/release-pr.yml:35: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/release-pr.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/release.yml:28: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/release.yml/main?enable=pin
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Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/release.yml:44: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/release.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/release.yml:68: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/release.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/update-browser-releases.yml:21: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/update-browser-releases.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/update-browser-releases.yml:25: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/update-browser-releases.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/update-mdn-urls.yml:20: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/update-mdn-urls.yml/main?enable=pin
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Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/update-web-features.yml:21: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/update-web-features.yml/main?enable=pin
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Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/update-webdriver-bidi-data.yml:21: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/update-webdriver-bidi-data.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/update-webdriver-bidi-data.yml:24: update your workflow using https://app.stepsecurity.io/secureworkflow/mdn/browser-compat-data/update-webdriver-bidi-data.yml/main?enable=pin
Warn: npmCommand not pinned by hash: .github/workflows/update-browser-releases.yml:30
Warn: npmCommand not pinned by hash: .github/workflows/update-browser-releases.yml:32
Info: 0 out of 24 GitHub-owned GitHubAction dependencies pinned
Info: 7 out of 9 third-party GitHubAction dependencies pinned
Info: 8 out of 10 npmCommand dependencies pinned

3

SAST

Determines if the project uses static code analysis.

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

Fuzzing

Determines if the project uses fuzzing.

0

Signed-Releases

Determines if the project cryptographically signs release artifacts.

0

Security-Policy

Determines if the project has published a security policy.

Score

5.9

/10

Last Scanned on 2025-07-07

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

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