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-npm, so that you could bundle your CommonJS dependencies in node_modules.

import { rollup } from 'rollup';
import commonjs from 'rollup-plugin-commonjs';
import npm from 'rollup-plugin-npm';

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

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

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