5to6-codemod

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

Usage

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!

Transforms

• amd - Transforms AMD style modules to ES6 import/export
• cjs - Transforms CommonJS style require() calls to ES6 import statements
• no-strict - Removes "use strict" statements
• exports - Move CommonJS style module.exports statements to ES6 export statements
• 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

Known issues

• Currently loses comments if directly before the require() statement.
• require() calls in single var statements get reordered, and moved before the single var after conversion to import.
• 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