Convert CommonJS modules to ES6, so they can be included in a Rollup bundle
npm install --save-dev rollup-plugin-commonjsTypically, 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(...)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' ]
}
});MIT