rollup-plugin-esmin

Rollup plugin to minify ES6+ code using babel-minify with no transpiling to ES5.

Why?

Modern browsers and Node.js are up to date with ES6+ native support.

Except for the work in progress import and export native support, but it is coming soon.

So, we can generate lighter bundles now by just let rollup resolve import and export and not transpiling ES6+ code to ES5, but just minifying it.

Install

npm i -D rollup-plugin-esmin

or

yarn add -D rollup-plugin-esmin

Usage

Just import on rollup config script and call it into plugins array.

import esmin from 'rollup-plugin-esmin'

export default {
  input: 'src/escode.js',
  plugins: [
    esmin()
  ],
  output: {
    format: 'umd',
    file: 'dist/modern.umd.js'
  }
}

Optionally, esmin() can receive an object argument with parameters to transmit to babel-minify.

This object can contains these optional keys:

esmin({
  options: {},
  overrides: {}
})

Those options and overrides are the same as documented at babel-minify.

Important

If you are using any other plugins to transform your code (like Typescript), it must be executed before.

rollup-plugin-esmin just minify ES6+ code.