This example shows the automatically created async commons chunks.
The example entry references two chunks:
- entry chunk
- async require -> chunk X
- async require -> chunk Y
- chunk X
- module
a - module
b - module
c
- module
- chunk Y
- module
a - module
b - module
d
- module
These chunks share modules a and b. The optimization extract these into chunk Z:
Note: The optimization compares the size of chunk Z to some minimum value, but this is disabled from this example. In practice, there is no configuration needed for this.
- entry chunk
- async require -> chunk X & Z
- async require -> chunk Y & Z
- chunk X
- module
c
- module
- chunk Y
- module
d
- module
- chunk Z
- module
a - module
b
- module
Pretty useful for a router in a SPA.
// a chunks with a, b, c
require(["./a", "./b", "./c"]);
// a chunk with a, b, d
require.ensure(["./a"], function(require) {
require("./b");
require("./d");
});/******/ (() => { // webpackBootstrap
/******/ var __webpack_modules__ = ({});/* webpack runtime code */
/************************************************************************/
/******/ // The module cache
/******/ var __webpack_module_cache__ = {};
/******/
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/ // Check if module is in cache
/******/ if(__webpack_module_cache__[moduleId]) {
/******/ return __webpack_module_cache__[moduleId].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;
/******/ }
/******/
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = __webpack_modules__;
/******/
/************************************************************************/
/******/ /* webpack/runtime/ensure chunk */
/******/ (() => {
/******/ __webpack_require__.f = {};
/******/ // This file contains only the entry chunk.
/******/ // The chunk loading function for additional chunks
/******/ __webpack_require__.e = (chunkId) => {
/******/ return Promise.all(Object.keys(__webpack_require__.f).reduce((promises, key) => {
/******/ __webpack_require__.f[key](chunkId, promises);
/******/ return promises;
/******/ }, []));
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/get javascript chunk filename */
/******/ (() => {
/******/ // This function allow to reference async chunks
/******/ __webpack_require__.u = (chunkId) => {
/******/ // return url for filenames based on template
/******/ return "" + chunkId + ".output.js";
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/hasOwnProperty shorthand */
/******/ (() => {
/******/ __webpack_require__.o = (obj, prop) => Object.prototype.hasOwnProperty.call(obj, prop)
/******/ })();
/******/
/******/ /* webpack/runtime/load script */
/******/ (() => {
/******/ var inProgress = {};
/******/ // data-webpack is not used as build has no uniqueName
/******/ // loadScript function to load a script via script tag
/******/ __webpack_require__.l = (url, done, key) => {
/******/ if(inProgress[url]) { inProgress[url].push(done); return; }
/******/ var script, needAttach;
/******/ if(key !== undefined) {
/******/ var scripts = document.getElementsByTagName("script");
/******/ for(var i = 0; i < scripts.length; i++) {
/******/ var s = scripts[i];
/******/ if(s.getAttribute("src") == url) { script = s; break; }
/******/ }
/******/ }
/******/ if(!script) {
/******/ needAttach = true;
/******/ script = document.createElement('script');
/******/
/******/ script.charset = 'utf-8';
/******/ script.timeout = 120;
/******/ if (__webpack_require__.nc) {
/******/ script.setAttribute("nonce", __webpack_require__.nc);
/******/ }
/******/
/******/ script.src = url;
/******/ }
/******/ inProgress[url] = [done];
/******/ var onScriptComplete = (prev, event) => {
/******/ // avoid mem leaks in IE.
/******/ script.onerror = script.onload = null;
/******/ clearTimeout(timeout);
/******/ var doneFns = inProgress[url];
/******/ delete inProgress[url];
/******/ script.parentNode && script.parentNode.removeChild(script);
/******/ doneFns && doneFns.forEach((fn) => fn(event));
/******/ if(prev) return prev(event);
/******/ }
/******/ ;
/******/ var timeout = setTimeout(onScriptComplete.bind(null, undefined, { type: 'timeout', target: script }), 120000);
/******/ script.onerror = onScriptComplete.bind(null, script.onerror);
/******/ script.onload = onScriptComplete.bind(null, script.onload);
/******/ needAttach && document.head.appendChild(script);
/******/ };
/******/ })();
/******/
/******/ /* webpack/runtime/publicPath */
/******/ (() => {
/******/ __webpack_require__.p = "dist/";
/******/ })();
/******/
/******/ /* webpack/runtime/jsonp chunk loading */
/******/ (() => {
/******/ // no baseURI
/******/
/******/ // object to store loaded and loading chunks
/******/ // undefined = chunk not loaded, null = chunk preloaded/prefetched
/******/ // Promise = chunk loading, 0 = chunk loaded
/******/ var installedChunks = {
/******/ 179: 0
/******/ };
/******/
/******/
/******/ __webpack_require__.f.j = (chunkId, promises) => {
/******/ // JSONP chunk loading for javascript
/******/ var installedChunkData = __webpack_require__.o(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;
/******/ if(installedChunkData !== 0) { // 0 means "already installed".
/******/
/******/ // a Promise means "currently loading".
/******/ if(installedChunkData) {
/******/ promises.push(installedChunkData[2]);
/******/ } else {
/******/ if(true) { // all chunks have JS
/******/ // setup Promise in chunk cache
/******/ var promise = new Promise((resolve, reject) => {
/******/ installedChunkData = installedChunks[chunkId] = [resolve, reject];
/******/ });
/******/ promises.push(installedChunkData[2] = promise);
/******/
/******/ // start chunk loading
/******/ var url = __webpack_require__.p + __webpack_require__.u(chunkId);
/******/ // create error before stack unwound to get useful stacktrace later
/******/ var error = new Error();
/******/ var loadingEnded = (event) => {
/******/ if(__webpack_require__.o(installedChunks, chunkId)) {
/******/ installedChunkData = installedChunks[chunkId];
/******/ if(installedChunkData !== 0) installedChunks[chunkId] = undefined;
/******/ if(installedChunkData) {
/******/ var errorType = event && (event.type === 'load' ? 'missing' : event.type);
/******/ var realSrc = event && event.target && event.target.src;
/******/ error.message = 'Loading chunk ' + chunkId + ' failed.\n(' + errorType + ': ' + realSrc + ')';
/******/ error.name = 'ChunkLoadError';
/******/ error.type = errorType;
/******/ error.request = realSrc;
/******/ installedChunkData[1](error);
/******/ }
/******/ }
/******/ };
/******/ __webpack_require__.l(url, loadingEnded, "chunk-" + chunkId);
/******/ } else installedChunks[chunkId] = 0;
/******/ }
/******/ }
/******/ };
/******/
/******/ // no prefetching
/******/
/******/ // no preloaded
/******/
/******/ // no HMR
/******/
/******/ // no HMR manifest
/******/
/******/ // no deferred startup
/******/
/******/ // install a JSONP callback for chunk loading
/******/ var webpackJsonpCallback = (parentChunkLoadingFunction, data) => {
/******/ var [chunkIds, moreModules, runtime] = data;
/******/ // add "moreModules" to the modules object,
/******/ // then flag all "chunkIds" as loaded and fire callback
/******/ var moduleId, chunkId, i = 0, resolves = [];
/******/ for(;i < chunkIds.length; i++) {
/******/ chunkId = chunkIds[i];
/******/ if(__webpack_require__.o(installedChunks, chunkId) && installedChunks[chunkId]) {
/******/ resolves.push(installedChunks[chunkId][0]);
/******/ }
/******/ installedChunks[chunkId] = 0;
/******/ }
/******/ for(moduleId in moreModules) {
/******/ if(__webpack_require__.o(moreModules, moduleId)) {
/******/ __webpack_require__.m[moduleId] = moreModules[moduleId];
/******/ }
/******/ }
/******/ if(runtime) runtime(__webpack_require__);
/******/ if(parentChunkLoadingFunction) parentChunkLoadingFunction(data);
/******/ while(resolves.length) {
/******/ resolves.shift()();
/******/ }
/******/
/******/ }
/******/
/******/ var chunkLoadingGlobal = self["webpackChunk"] = self["webpackChunk"] || [];
/******/ chunkLoadingGlobal.forEach(webpackJsonpCallback.bind(null, 0));
/******/ chunkLoadingGlobal.push = webpackJsonpCallback.bind(null, chunkLoadingGlobal.push.bind(chunkLoadingGlobal));
/******/
/******/ // no deferred startup
/******/ })();
/******/
/************************************************************************//*!********************!*\
!*** ./example.js ***!
\********************/
/*! unknown exports (runtime-defined) */
/*! runtime requirements: __webpack_require__, __webpack_require__.e, __webpack_require__.oe, __webpack_require__.* */
// a chunks with a, b, c
Promise.all(/*! AMD require */[__webpack_require__.e(394), __webpack_require__.e(460)]).then(function() {[__webpack_require__(/*! ./a */ 1), __webpack_require__(/*! ./b */ 2), __webpack_require__(/*! ./c */ 3)];}).catch(__webpack_require__.oe);
// a chunk with a, b, d
Promise.all(/*! require.ensure */[__webpack_require__.e(394), __webpack_require__.e(767)]).then((function(require) {
__webpack_require__(/*! ./b */ 2);
__webpack_require__(/*! ./d */ 4);
}).bind(null, __webpack_require__)).catch(__webpack_require__.oe);
/******/ })()
;(self["webpackChunk"] = self["webpackChunk"] || []).push([[394],[
/* 0 */,
/* 1 */
/*!**************!*\
!*** ./a.js ***!
\**************/
/*! unknown exports (runtime-defined) */
/*! runtime requirements: module */
/*! CommonJS bailout: module.exports is used directly at 1:0-14 */
/***/ ((module) => {
module.exports = "a";
/***/ }),
/* 2 */
/*!**************!*\
!*** ./b.js ***!
\**************/
/*! unknown exports (runtime-defined) */
/*! runtime requirements: module */
/*! CommonJS bailout: module.exports is used directly at 1:0-14 */
/***/ ((module) => {
module.exports = "b";
/***/ })
]]);(self["webpackChunk"] = self["webpackChunk"] || []).push([[460],{
/***/ 3:
/*!**************!*\
!*** ./c.js ***!
\**************/
/*! unknown exports (runtime-defined) */
/*! runtime requirements: module */
/*! CommonJS bailout: module.exports is used directly at 1:0-14 */
/***/ ((module) => {
module.exports = "c";
/***/ })
}]);(self["webpackChunk"] = self["webpackChunk"] || []).push([[767],{
/***/ 4:
/*!**************!*\
!*** ./d.js ***!
\**************/
/*! unknown exports (runtime-defined) */
/*! runtime requirements: module */
/*! CommonJS bailout: module.exports is used directly at 1:0-14 */
/***/ ((module) => {
module.exports = "d";
/***/ })
}]);asset output.js 9.17 KiB [emitted] (name: main)
asset 394.output.js 610 bytes [emitted]
asset 460.output.js 338 bytes [emitted]
asset 767.output.js 338 bytes [emitted]
chunk (runtime: main) output.js (main) 164 bytes (javascript) 4.97 KiB (runtime) [entry] [rendered]
> ./example.js main
runtime modules 4.97 KiB 6 modules
./example.js 164 bytes [built] [code generated]
[used exports unknown]
entry ./example.js main
chunk (runtime: main) 394.output.js 42 bytes [rendered] split chunk (cache group: default)
> ./a ./b ./c ./example.js 2:0-30
> ./example.js 5:0-8:2
./a.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./a.js 1:0-14
amd require ./a ./example.js 2:0-30
require.ensure item ./a ./example.js 5:0-8:2
./b.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./b.js 1:0-14
amd require ./b ./example.js 2:0-30
cjs require ./b ./example.js 6:1-15
chunk (runtime: main) 460.output.js 21 bytes [rendered]
> ./a ./b ./c ./example.js 2:0-30
./c.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./c.js 1:0-14
amd require ./c ./example.js 2:0-30
chunk (runtime: main) 767.output.js 21 bytes [rendered]
> ./example.js 5:0-8:2
./d.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./d.js 1:0-14
cjs require ./d ./example.js 7:1-15
webpack 5.11.1 compiled successfully
asset output.js 1.8 KiB [emitted] [minimized] (name: main)
asset 394.output.js 104 bytes [emitted] [minimized]
asset 460.output.js 81 bytes [emitted] [minimized]
asset 767.output.js 81 bytes [emitted] [minimized]
chunk (runtime: main) output.js (main) 164 bytes (javascript) 4.97 KiB (runtime) [entry] [rendered]
> ./example.js main
runtime modules 4.97 KiB 6 modules
./example.js 164 bytes [built] [code generated]
[no exports used]
entry ./example.js main
chunk (runtime: main) 394.output.js 42 bytes [rendered] split chunk (cache group: default)
> ./a ./b ./c ./example.js 2:0-30
> ./example.js 5:0-8:2
./a.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./a.js 1:0-14
amd require ./a ./example.js 2:0-30
require.ensure item ./a ./example.js 5:0-8:2
./b.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./b.js 1:0-14
amd require ./b ./example.js 2:0-30
cjs require ./b ./example.js 6:1-15
chunk (runtime: main) 460.output.js 21 bytes [rendered]
> ./a ./b ./c ./example.js 2:0-30
./c.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./c.js 1:0-14
amd require ./c ./example.js 2:0-30
chunk (runtime: main) 767.output.js 21 bytes [rendered]
> ./example.js 5:0-8:2
./d.js 21 bytes [built] [code generated]
[used exports unknown]
cjs self exports reference ./d.js 1:0-14
cjs require ./d ./example.js 7:1-15
webpack 5.11.1 compiled successfully