postcss/autoprefixer
Autoprefixer
Autoprefixer is a PostCSS plugin and browser compatibility tool that automatically manages vendor prefixes for CSS rules. It functions as an abstract syntax tree transformer that parses CSS to insert required prefixes and remove obsolete ones based on real-time compatibility data.
The project differentiates itself by providing a dedicated CSS Grid polyfill, which translates modern Grid syntax into legacy formats for older browser versions. It also allows for granular control through the use of inline CSS comments to selectively enable or disable prefixing for specific rules.
The system covers broad capability areas including browser targeting via configuration queries, automated stylesheet maintenance, and compatibility analysis. It provides diagnostic warnings for outdated syntax and detailed reports on the specific prefixes applied to the code.
Features
- Vendor Prefix Managers - Automatically inserts required browser-specific vendor prefixes into CSS rules based on compatibility data.
- External Data Integrations - Integrates with external browser compatibility databases to determine necessary vendor prefixes in real-time.
- AST Transformation Tools - Parses CSS into an abstract syntax tree to modify and clean vendor-specific properties.
- AST Mutations - Implements CSS transformation by modifying the abstract syntax tree to inject or remove vendor prefixes.
- Browser Compatibility Targets - Allows users to define the minimum browser versions supported through queries or configuration files.
- Browser Version Resolution - Resolves supported browser versions by parsing configuration strings to filter required prefixes.
- Plugin Architectures - Operates as a modular plugin within the PostCSS architecture to transform CSS parse trees.
- Browser Compatibility & Utilities - Ensures stylesheets work across different web browsers by adding necessary vendor prefixes.
- Cross-Browser CSS Authoring - Enables writing modern CSS once and automatically generating the browser-specific syntax needed for older versions.
- Grid Polyfills - Translates modern CSS Grid syntax into compatible versions for older browsers, including autoplacement support.
- Build Pipeline Integrations - Integrates into build pipelines as a PostCSS plugin to automate prefixing and compatibility checks.
- Prefixing Control Comments - Provides granular control over prefixing using inline CSS comment markers to skip or force prefixes.
- CSS Syntax Transpilation - Translates modern CSS Grid declarations into compatible legacy formats for older browser versions.
- Inline Prefixing Controls - Supports the use of inline CSS comments to selectively enable or disable prefixing for specific rules.
- Build and Transpilation Tools - PostCSS plugin to add vendor prefixes automatically.
