JavaScript codemod development resources

Links to helpful JavaScript and TypeScript resources for writing codemods.

Codemod tools & codemods

• JsCodeShift - Original JavaScript codemod library from Facebook
  • JsCodeMod - Codemods for JsCodeShift
• Codemod-JS - Run codemods using Babel plugins
  • Resurgar - Codemods for Codemod-JS
• Putout - Codemod runner with many codemod plugins
• Lebab (Github) - Another codemod runner

Foundational libraries

• Babel (Github) - JavaScript parser and transformation framework
  • Babel UI Repl
  • Babel Transform List with ES versions
• Recast - Formatting-preserving JavaScript printer for ASTs

AST Viewers

• AST Explorer - Online tool for exploring and transforming ASTs (abstract syntax trees)
• AST Viewer for TypeScript

JavaScript / TypeScript development

• JavaScript Operator Lookup
• Regex 101 - Regular expression testing and development tool
• ECMAScript compatibility
  • https://kangax.github.io/compat-table/es6/
  • https://caniuse.com/
• JavaScript Equality Table
• JavaScript Type Coercion Table