Recast
A JavaScript syntax tree transformer that preserves original formatting and generates source maps automatically.
What is Recast?
Recast is a JavaScript syntax tree transformer and pretty-printer that enables code manipulation while preserving original formatting. It parses JavaScript code into an abstract syntax tree (AST), allows developers to modify the AST, and reprints it with minimal changes to unmodified parts, maintaining code style and automatically generating source maps.
JavaScript and TypeScript developers building code transformation tools, such as codemods, linters, formatters, or compilers, who need to manipulate source code while preserving its original formatting and generating accurate source maps.
Developers choose Recast over alternatives because it reprints only modified parts of the syntax tree, preserving formatting for unmodified code, and automatically generates high-resolution source maps. Its parser-agnostic design supports multiple parsers like Esprima, Acorn, TypeScript, Flow, and Babel, offering flexibility for different syntax needs.
Overview
JavaScript syntax tree transformer, nondestructive pretty-printer, and automatic source map generator
Use Cases
Best For
- Writing codemods that refactor code while maintaining existing formatting and comments.
Found a gem we're missing?
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.