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@babel/plugin-transform-modules-commonjs

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@babel/plugin-transform-modules-commonjs

This plugin transforms ES2015 modules to CommonJS

7.25.9
latest
Source
npm

Version published: last month

Maintainers: 4

Created: 7 years ago

What is @babel/plugin-transform-modules-commonjs?

The @babel/plugin-transform-modules-commonjs npm package is a Babel plugin that transforms ECMAScript modules to CommonJS modules. This is useful for enabling code written using ES6 module syntax to run in environments that only support CommonJS modules, such as older versions of Node.js or browsers without ES6 module support.

What are @babel/plugin-transform-modules-commonjs's main functionalities?

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));

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