Rollup 3

[hyrious]

Upgrading to rollup 3 could slightly decrease the bundle size for CJS with --treeshake:

Rollup Repl 2.79.1

Rollup Repl 3.2.3
removed Object.defineProperty(exports, '__esModule', { value: true });

There're a few built-in rollup plugins in tsup currently prevents our upgrading:

• @rollup/plugin-json: 👍 5.0.0 available
• rollup-plugin-dts : 👍 5.0.0 available
• rollup-plugin-hashbang: ❓ need investigate

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[github-actions]

🎉 This issue has been resolved in version 6.4.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[freddydrodev]

after upgrading to version 6.4.0 my bundle size has been reduced from 1.05 Mb to 279Kb almost 4x

[csantos1113]

I'm having an issue after upgrading to 6.4.0 bundling to CJS.

Here is a simplified version of my react code:

// Component.tsx

import ReactSelect from 'react-select';

const Comp = (props) => {
  return <ReactSelect {...props} />
}

// tsup.config.ts

export default {
  bundle: true,
  clean: true,
  dts: true,
  format: ['cjs', 'esm'],
  minify: false,
  sourcemap: true,
  splitting: true,
  target: 'es2022',
  treeshake: 'smallest'

The generated CJS file with tsup v6.3.0 was working ✅

var ReactSelect = require('react-select');
var ReactSelect__default = /*#__PURE__*/_interopDefaultLegacy(ReactSelect);

var Comp = (props) => {
  return /* @__PURE__ */ jsxRuntime.jsx(ReactSelect__default["default"], { ...props });
}

The generated CJS file with tsup v6.4.0 isn't working ⚠️

var ReactSelect = require('react-select');
var Comp = (props) => {
  return /* @__PURE__ */ jsxRuntime.jsx(ReactSelect, { ...props });
}

Do you know if there is additional rollup configuration I need to pass to have rollup resolving default exports properly?

[hyrious]

Rollup 3 changed the default output.interop behavior. We'd better set it to auto behind tsup.

[csantos1113]

Rollup 3 changed the default output.interop behavior. We'd better set it to auto behind tsup.

I figured, I've opened a PR with that change: #815