A collection of codemods that allow you to transform your JavaScript code from ES5 to ES6 using jscodeshift.

1. npm install -g jscodeshift
2. npm install 5to6-codemod
3. jscodeshift -t node_modules/5to6-codemod/transforms/[transform].js [files]
4. Review changes via git diff. Keep what you want, throw it out if you don't. Magic!

When executing codemods, you can configure options like so:

jscodeshift -t node_modules/5to6-codemod/transforms/[transform].js [files] --key=value

Our transforms will automatically distinguish and pass through Recast config keys via jscodeshift. Official documentation for Recast's configuration can be found here. We currently support the following Recast keys:

• esprima
• inputSourceMap
• lineTerminator
• quote
• range
• reuseWhitespace
• sourceFileName
• sourceMapName
• sourceRoot
• tabWidth
• tolerant
• trailingComma
• useTabs
• wrapColumn

• amd - Transforms AMD style modules to ES6 import/export
• cjs - Transforms CommonJS style require() calls to ES6 import statements
  • This transformation accepts the following option flags:
    • hoist: Enables hoisting require statements to the top
• no-strict - Removes "use strict" statements
• exports - Move CommonJS style module.exports statements to ES6 export statements
• named-export-generation - Adds named exports corresponding to default export object keys. Only valid for ES6 modules exporting an object as the default export.
• let - Replace all var calls to use let
• simple-arrow - Replace all function expressions with a body of a sole return statement into arrow functions

• Can't automagically figure out when you want to use import * as varName.
• End-of-line comments also missing in many situations
• simple-arrow loses comments in the function expression body