rollup exports

rollup.config.js

/* ----- default ----- */

// src: export default someFunc
// dist: module.exports = someFunc
const defaultCjs = {
  input: 'src/default.js',
  output: {
    file: 'dist/default.cjs',
    format: 'cjs'
  },
  plugins: [],
};

// src: export default someFunc
// dist: export { someFunc as default };
const defaultEsm = {
  input: 'src/default.js',
  output: {
    file: 'dist/default.mjs',
    format: 'esm'
  },
  plugins: [],
};

/* ----- named ----- */

// src: export const someFunc =
// dist: exports.someFunc = someFunc;
const namedCjs = {
  input: 'src/named.js',
  output: {
    file: 'dist/named.cjs',
    format: 'cjs'
  },
  plugins: [],
};

// src: export const someFunc =
// dist: export { someFunc };
const namedEsm = {
  input: 'src/named.js',
  output: {
    file: 'dist/named.mjs',
    format: 'esm'
  },
  plugins: [],
};

/* ----- mixed ----- */

// src:
//   export default someFunc
//   export someFunc2
// dist:
//   Object.defineProperty(exports, '__esModule', { value: true });
//   exports["default"] = someFunc;
//   exports.someFunc2 = someFunc2;
const mixedCjs = {
  input: 'src/mixed.js',
  output: {
    file: 'dist/mixed.cjs',
    format: 'cjs'
  },
  plugins: [],
};

// src:
//   export default someFunc
//   export someFunc2
// dist:
//   export { someFunc as default, someFunc2 };
const mixedEsm = {
  input: 'src/mixed.js',
  output: {
    file: 'dist/mixed.mjs',
    format: 'esm'
  },
  plugins: [],
};

export default [
  defaultCjs,
  defaultEsm,
  namedCjs,
  namedEsm,
  mixedCjs,
  mixedEsm,
];