npm-es-modules-5-rollup

Breakdown of 7 different ways to use ES modules with npm today.

This approach uses babel+rollup to compile Node.js and browser source files.

• Source files end in .mjs
• Supports all three targets main module, and browser
• All three targets are compiled via rollup, with Node.js and the browser having two separate configs
• This is our first module to support node >= 4 (or whatever we specify in our babel-preset-env config) instead of node >= 8
• Source maps are generated along with the compiled targets

Approaches

1. naive - The most naive possible use of ES modules supporting our functionality. This approach is broken and provided as an example starting point.
2. babel - Uses babel to transpile all Node.js and browser source files.
3. esm-rollup - Uses esm for Node.js and babel+rollup to compile browser source files.
4. esm-webpack - Uses esm for Node.js and babel+webpack to compile browser source files.
5. rollup - Uses babel+rollup to compile all Node.js and browser source files.
6. webpack - Uses babel+webpack to compile all Node.js and browser source files.
7. typescript - Uses typescript to transpile all Node.js and browser source files.

License

MIT © Travis Fischer