CSSTree is a tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations.
The main goal is to be efficient and W3C spec compliant, with focus on CSS analyzing and source-to-source transforming tasks.
This is free and open source software.
Features include:
- Detailed parsing with an adjustable level of detail – by default CSSTree parses CSS as detailed as possible, i.e. each single logical part is representing with its own AST node (see AST format for all possible node types).
- Tolerant to errors by design.
- Fast and efficient – created with focus on performance and effective memory consumption.
- Syntax validation – the built-in lexer can test CSS against syntaxes defined by W3C. CSSTree uses mdn/data as a basis for lexer’s dictionaries and extends it with vendor specific and legacy syntaxes. Lexer can only check the declaration values and at-rules currently, but this feature will be extended to other parts of the CSS in the future
Website: github.com/csstree/csstree
Support:
Developer: Roman Dvornov
License: MIT License
CSSTree is written in JavaScript. Learn JavaScript with our recommended free books and free tutorials.
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