Browser compatibility data for Web technologies as displayed on MDN
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The `@mdn/browser-compat-data` package provides machine‑readable compatibility tables for web technologies—including HTML, CSS, JavaScript APIs, and more—so developers can reliably check how features work across browsers and runtimes. It’s intended for anyone building tools, IDEs, documentation sites, test frameworks, or applications that need up‑to‑date, structured browser‑support information.
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Support the dependencies of mdn/browser-compat-data
The MDN page inventory as a big JSON object.
HTML parser and non-strict validator
Compatibility utilities for ESLint
ESLint JavaScript language implementation
TypeScript definitions for deep-diff
TypeScript definitions for mocha
TypeScript definitions for node
TypeScript definitions for yargs
Custom error messages in JSON Schemas for Ajv validator
Format validation for Ajv v7+
output coverage reports using Node.js' built in coverage
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Curated list of Web platform features
Curated list of technical Web specifications
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yargs the modern, pirate-themed, successor to optimist.
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