Package Exports

rollup-plugin-commonjs

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (rollup-plugin-commonjs) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

rollup-plugin-commonjs

Convert CommonJS modules to ES6, so they can be included in a Rollup bundle

Installation

npm install --save-dev rollup-plugin-commonjs

Usage

Typically, you would use this plugin alongside rollup-plugin-node-resolve, so that you could bundle your CommonJS dependencies in node_modules.

import { rollup } from 'rollup';
import commonjs from 'rollup-plugin-commonjs';
import nodeResolve from 'rollup-plugin-node-resolve';

rollup({
  entry: 'main.js',
  plugins: [
    nodeResolve({
      jsnext: true,
      main: true
    }),

    commonjs({
      // non-CommonJS modules will be ignored, but you can also
      // specifically include/exclude files
      include: 'node_modules/**',  // Default: undefined
      exclude: [ 'node_modules/foo/**', 'node_modules/bar/**' ],  // Default: undefined

      // search for files other than .js files (must already
      // be transpiled by a previous plugin!)
      extensions: [ '.js', '.coffee' ],  // Default: [ '.js' ]

      // if true then uses of `global` won't be dealt with by this plugin
      ignoreGlobal: false,  // Default: false

      // if false then skip sourceMap generation for CommonJS modules
      sourceMap: false,  // Default: true
      
      // explicitly specify unresolvable named exports
      // (see below for more details)
      namedExports: { './module.js': ['foo', 'bar' ] }  // Default: undefined 
    })
  ]
}).then(...)

Custom named exports

This plugin will attempt to create named exports, where appropriate, so you can do this...

// importer.js
import { named } from './exporter.js';

// exporter.js
module.exports = { named: 42 }; // or `exports.named = 42;`

...but that's not always possible:

// importer.js
import { named } from 'my-lib';

// my-lib.js
var myLib = exports;
myLib.named = 'you can\'t see me';

In those cases, you can specify custom named exports:

commonjs({
  namedExports: {
    // left-hand side can be an absolute path, a path
    // relative to the current directory, or the name
    // of a module in node_modules
    'node_modules/my-lib/index.js': [ 'named' ]
  }
});

License

MIT