fix: default exports not working on CJS + treeshake: true

[csantos1113]

Fixes #814

rollup v3 changed the interop behavior: https://rollupjs.org/guide/en/#outputinterop

Note that the default mode of "default" mimics NodeJS behavior and is different from TypeScript esModuleInterop. To get TypeScript's behavior, explicitly set the value to "auto". In the examples, we will be using the CommonJS format, but the choice of interop similarly applies to AMD, IIFE and UMD targets as well.

Source code example

Component

import ReactSelect from 'react-select'
      
export const Component = (props: {}) => {
  return <ReactSelect {...props} />
};

tsup flags

--treeshake --target es2022 --format cjs

tsconfig

{
  "compilerOptions": {
     "baseUrl": ".",
     "esModuleInterop": true,
     "isolatedModules": true,
     "jsx": "react-jsx",
     "lib": ["dom", "dom.iterable", "esnext"],
     "module": "esnext",
     "moduleResolution": "node",
     "noEmit": true,
     "rootDir": ".",
     "skipLibCheck": true,
     "sourceMap": true,
     "strict": true,
     "target": "es6",
     "importHelpers": true,
     "outDir": "dist"
  }
}

Output before this PR 🤕

'use strict';

var ReactSelect = require('react-select');
var jsxRuntime = require('react/jsx-runtime');

// input.tsx
var Component = (props) => {
  return /* @__PURE__ */ jsxRuntime.jsx(ReactSelect, {
    ...props
  });
};

exports.Component = Component;

Output after this PR 😎

'use strict';

var ReactSelect = require('react-select');
var jsxRuntime = require('react/jsx-runtime');

function _interopDefault (e) { return e && e.__esModule ? e : { default: e }; }

var ReactSelect__default = /*#__PURE__*/_interopDefault(ReactSelect);

// input.tsx
var Component = (props) => {
  return /* @__PURE__ */ jsxRuntime.jsx(ReactSelect__default.default, {
    ...props
  });
};

exports.Component = Component;

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Name	Status	Preview	Updated
tsup	✅ Ready (Inspect)	Visit Preview	Jan 9, 2023 at 10:52PM (UTC)

[github-actions]

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