@babel/plugin-transform-modules-commonjs

Transform ES6 import statements to CommonJS require

Converts ES6 import statements into CommonJS require calls.

import { square } from './math';
console.log(square(5));
// Transformed code:
var _math = require('./math');
console.log(_math.square(5));

Transform ES6 export statements to CommonJS exports

Converts ES6 named and default export statements into CommonJS module.exports assignments.

export const square = (n) => n * n;
export default square;
// Transformed code:
const square = (n) => n * n;
exports.square = square;
exports.default = square;

Interoperability with Babel's module interop helpers

Ensures compatibility with Babel's interopRequireDefault helper to handle default exports when importing modules.

import square from './math';
console.log(square(5));
// Transformed code with interopRequireDefault helper:
var _math = _interopRequireDefault(require('./math'));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
console.log(_math.default(5));