example.js
// harmony module
// import from CommonJS module
import fs from "./fs";
import { readFile } from "./fs";
import * as fs2 from "./fs";
fs.readFile("file");
readFile("file");
fs2.readFile("file");
// import from harmony module
import { readFile as readFile2 } from "./reexport-commonjs";
readFile2("file");
// import a CommonJs module for side effects
import "./example2";
fs.js
// an example CommonJs module
// content is omitted for brevity
exports.readFile = function() {};
// using module.exports would be equivalent,
// webpack doesn't care which syntax is used
// AMD modules are also possible and equivalent to CommonJs modules
reexport-commonjs.js
// reexport a CommonJs module
export * from "./fs";
// Note that the default export doesn't reexport via export *
// (this is not interop-specific, it applies for every export *)
// Note: reexporting a CommonJs module is a special case,
// because in this module we have no information about exports
example2.js
// CommonJs module
// require a harmony module
var module = require("./harmony");
var defaultExport = module.default;
var namedExport = module.named;
harmony.js
// just some exports
export default "default";
export var named = "named";
dist/output.js
/******/ (() => { // webpackBootstrap
/******/ var __webpack_modules__ = ([
/* 0 */,
/* 1 */
/*!***************!*\
!*** ./fs.js ***!
\***************/
/*! default exports */
/*! export readFile [provided] [no usage info] [missing usage info prevents renaming] */
/*! other exports [not provided] [no usage info] */
/*! runtime requirements: __webpack_exports__ */
/***/ ((__unused_webpack_module, exports) => {
// an example CommonJs module
// content is omitted for brevity
exports.readFile = function() {};
// using module.exports would be equivalent,
// webpack doesn't care which syntax is used
// AMD modules are also possible and equivalent to CommonJs modules
/***/ }),
/* 2 */
/*!******************************!*\
!*** ./reexport-commonjs.js ***!
\******************************/
/*! namespace exports */
/*! export readFile [provided] [no usage info] [missing usage info prevents renaming] -> ./fs.js .readFile */
/*! other exports [not provided] [no usage info] */
/*! runtime requirements: __webpack_require__, __webpack_exports__, __webpack_require__.d, __webpack_require__.r, __webpack_require__.* */
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {
"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */ "readFile": () => (/* reexport safe */ _fs__WEBPACK_IMPORTED_MODULE_0__.readFile)
/* harmony export */ });
/* harmony import */ var _fs__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./fs */ 1);
// reexport a CommonJs module
// Note that the default export doesn't reexport via export *
// (this is not interop-specific, it applies for every export *)
// Note: reexporting a CommonJs module is a special case,
// because in this module we have no information about exports
/***/ }),
/* 3 */
/*!*********************!*\
!*** ./example2.js ***!
\*********************/
/*! unknown exports (runtime-defined) */
/*! runtime requirements: __webpack_require__ */
/***/ ((__unused_webpack_module, __unused_webpack_exports, __webpack_require__) => {
// CommonJs module
// require a harmony module
var module = __webpack_require__(/*! ./harmony */ 4);
var defaultExport = module.default;
var namedExport = module.named;
/***/ }),
/* 4 */
/*!********************!*\
!*** ./harmony.js ***!
\********************/
/*! namespace exports */
/*! export default [provided] [no usage info] [missing usage info prevents renaming] */
/*! export named [provided] [no usage info] [missing usage info prevents renaming] */
/*! other exports [not provided] [no usage info] */
/*! runtime requirements: __webpack_exports__, __webpack_require__.r, __webpack_require__.d, __webpack_require__.* */
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {
"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */ "default": () => (__WEBPACK_DEFAULT_EXPORT__),
/* harmony export */ "named": () => (/* binding */ named)
/* harmony export */ });
// just some exports
/* harmony default export */ const __WEBPACK_DEFAULT_EXPORT__ = ("default");
var named = "named";
/***/ })
/******/ ]);
/* webpack runtime code */
/************************************************************************/
/******/ // The module cache
/******/ var __webpack_module_cache__ = {};
/******/
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/ // Check if module is in cache
/******/ var cachedModule = __webpack_module_cache__[moduleId];
/******/ if (cachedModule !== undefined) {
/******/ return cachedModule.exports;
/******/ }
/******/ // Create a new module (and put it into the cache)
/******/ var module = __webpack_module_cache__[moduleId] = {
/******/ // no module.id needed
/******/ // no module.loaded needed
/******/ exports: {}
/******/ };
/******/
/******/ // Execute the module function
/******/ __webpack_modules__[moduleId](module, module.exports, __webpack_require__);
/******/
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/
/************************************************************************/
/******/ /* webpack/runtime/compat get default export */
/******/ (() => {
/******/ // getDefaultExport function for compatibility with non-harmony modules
/******/ __webpack_require__.n = (module) => {
/******/ var getter = module && module.__esModule ?
/******/ () => (module['default']) :
/******/ () => (module);
/******/ __webpack_require__.d(getter, { a: getter });
/******/ return getter;
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/define property getters */
/******/ (() => {
/******/ // define getter functions for harmony exports
/******/ __webpack_require__.d = (exports, definition) => {
/******/ for(var key in definition) {
/******/ if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
/******/ Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
/******/ }
/******/ }
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/hasOwnProperty shorthand */
/******/ (() => {
/******/ __webpack_require__.o = (obj, prop) => (Object.prototype.hasOwnProperty.call(obj, prop))
/******/ })();
/******/
/******/ /* webpack/runtime/make namespace object */
/******/ (() => {
/******/ // define __esModule on exports
/******/ __webpack_require__.r = (exports) => {
/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ }
/******/ Object.defineProperty(exports, '__esModule', { value: true });
/******/ };
/******/ })();
/******/
/************************************************************************/
var __webpack_exports__ = {};
// This entry need to be wrapped in an IIFE because it need to be in strict mode.
(() => {
"use strict";
/*!********************!*\
!*** ./example.js ***!
\********************/
/*! namespace exports */
/*! exports [not provided] [no usage info] */
/*! runtime requirements: __webpack_require__, __webpack_require__.n, __webpack_require__.r, __webpack_exports__, __webpack_require__.* */
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var _fs__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! ./fs */ 1);
/* harmony import */ var _reexport_commonjs__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(/*! ./reexport-commonjs */ 2);
/* harmony import */ var _example2__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(/*! ./example2 */ 3);
/* harmony import */ var _example2__WEBPACK_IMPORTED_MODULE_2___default = /*#__PURE__*/__webpack_require__.n(_example2__WEBPACK_IMPORTED_MODULE_2__);
// harmony module
// import from CommonJS module
_fs__WEBPACK_IMPORTED_MODULE_0__.readFile("file");
(0,_fs__WEBPACK_IMPORTED_MODULE_0__.readFile)("file");
_fs__WEBPACK_IMPORTED_MODULE_0__.readFile("file");
// import from harmony module
(0,_reexport_commonjs__WEBPACK_IMPORTED_MODULE_1__.readFile)("file");
// import a CommonJs module for side effects
})();
/******/ })()
;
Info
Unoptimized
asset output.js 7.12 KiB [emitted] (name: main)
chunk (runtime: main) output.js (main) 1.13 KiB (javascript) 937 bytes (runtime) [entry] [rendered]
> ./example.js main
dependent modules 785 bytes [dependent] 4 modules
runtime modules 937 bytes 4 modules
./example.js 374 bytes [built] [code generated]
[no exports]
[used exports unknown]
entry ./example.js main
webpack 5.51.1 compiled successfully
Production mode
asset output.js 773 bytes [emitted] [minimized] (name: main)
chunk (runtime: main) output.js (main) 1.13 KiB (javascript) 670 bytes (runtime) [entry] [rendered]
> ./example.js main
dependent modules 484 bytes [dependent] 3 modules
runtime modules 670 bytes 3 modules
./example.js + 1 modules 675 bytes [built] [code generated]
[no exports]
[no exports used]
entry ./example.js main
webpack 5.51.1 compiled successfully
d28592e9da