Building a tree shaking package using rollup.

[chen86860]

rollup-esm-template

Building a tree shaking package using rollup.

Requirements

1. Set a slideEffect: false flag in package.json

    "sideEffects": false,

2. Make all export to input
3. Setting output to esm

export default {
  input: ["src/*.ts"],
  output: {
    dir: pkg.module,
    format: "esm",
  },
  plugins: [commonjs(), typescript(), resolve(), multiInput()],
};

4. Build it!

Usage

import { foo } from "@chen86860/rollup-esm-template";

foo();

For that, the bar function in @chen86860/rollup-esm-template will not build into bundle by tree shaking.

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Related repository: rollup-esm-template