# example.js This example illustrates how to filter the ContextModule results of `import()` statements. only `.js` files that don't end in `.noimport.js` within the `templates` folder will be bundled. ```javascript async function getTemplate(templateName) { try { let template = await import( /* webpackInclude: /\.js$/ */ /* webpackExclude: /\.noimport\.js$/ */ `./templates/${templateName}` ); console.log(template); } catch(err) { console.error(err); return new Error(err); } } getTemplate("foo"); getTemplate("bar"); getTemplate("baz"); getTemplate("foo.noimport"); getTemplate("bar.noimport"); getTemplate("baz.noimport"); ``` # templates/ - foo.js - foo.noimport.js - baz.js - foo.noimport.js - bar.js - foo.noimport.js All templates are of this pattern: ```javascript var foo = "foo"; export default foo; ``` # dist/output.js
/******/ (function(modules) { /* webpackBootstrap */ }) ```javascript /******/ (function(modules) { // webpackBootstrap /******/ // install a JSONP callback for chunk loading /******/ function webpackJsonpCallback(data) { /******/ var chunkIds = data[0]; /******/ var moreModules = data[1]; /******/ /******/ /******/ // 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(installedChunks[chunkId]) { /******/ resolves.push(installedChunks[chunkId][0]); /******/ } /******/ installedChunks[chunkId] = 0; /******/ } /******/ for(moduleId in moreModules) { /******/ if(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) { /******/ modules[moduleId] = moreModules[moduleId]; /******/ } /******/ } /******/ if(parentJsonpFunction) parentJsonpFunction(data); /******/ /******/ while(resolves.length) { /******/ resolves.shift()(); /******/ } /******/ /******/ }; /******/ /******/ /******/ // The module cache /******/ var installedModules = {}; /******/ /******/ // object to store loaded and loading chunks /******/ // undefined = chunk not loaded, null = chunk preloaded/prefetched /******/ // Promise = chunk loading, 0 = chunk loaded /******/ var installedChunks = { /******/ 3: 0 /******/ }; /******/ /******/ /******/ /******/ // script path function /******/ function jsonpScriptSrc(chunkId) { /******/ return __webpack_require__.p + "" + chunkId + ".output.js" /******/ } /******/ /******/ // The require function /******/ function __webpack_require__(moduleId) { /******/ /******/ // Check if module is in cache /******/ if(installedModules[moduleId]) { /******/ return installedModules[moduleId].exports; /******/ } /******/ // Create a new module (and put it into the cache) /******/ var module = installedModules[moduleId] = { /******/ i: moduleId, /******/ l: false, /******/ exports: {} /******/ }; /******/ /******/ // Execute the module function /******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__); /******/ /******/ // Flag the module as loaded /******/ module.l = true; /******/ /******/ // Return the exports of the module /******/ return module.exports; /******/ } /******/ /******/ // This file contains only the entry chunk. /******/ // The chunk loading function for additional chunks /******/ __webpack_require__.e = function requireEnsure(chunkId) { /******/ var promises = []; /******/ /******/ /******/ // JSONP chunk loading for javascript /******/ /******/ var installedChunkData = installedChunks[chunkId]; /******/ if(installedChunkData !== 0) { // 0 means "already installed". /******/ /******/ // a Promise means "currently loading". /******/ if(installedChunkData) { /******/ promises.push(installedChunkData[2]); /******/ } else { /******/ // setup Promise in chunk cache /******/ var promise = new Promise(function(resolve, reject) { /******/ installedChunkData = installedChunks[chunkId] = [resolve, reject]; /******/ }); /******/ promises.push(installedChunkData[2] = promise); /******/ /******/ // start chunk loading /******/ var script = document.createElement('script'); /******/ var onScriptComplete; /******/ /******/ script.charset = 'utf-8'; /******/ script.timeout = 120; /******/ if (__webpack_require__.nc) { /******/ script.setAttribute("nonce", __webpack_require__.nc); /******/ } /******/ script.src = jsonpScriptSrc(chunkId); /******/ /******/ onScriptComplete = function (event) { /******/ // avoid mem leaks in IE. /******/ script.onerror = script.onload = null; /******/ clearTimeout(timeout); /******/ var chunk = installedChunks[chunkId]; /******/ if(chunk !== 0) { /******/ if(chunk) { /******/ var errorType = event && (event.type === 'load' ? 'missing' : event.type); /******/ var realSrc = event && event.target && event.target.src; /******/ var error = new Error('Loading chunk ' + chunkId + ' failed.\n(' + errorType + ': ' + realSrc + ')'); /******/ error.type = errorType; /******/ error.request = realSrc; /******/ chunk[1](error); /******/ } /******/ installedChunks[chunkId] = undefined; /******/ } /******/ }; /******/ var timeout = setTimeout(function(){ /******/ onScriptComplete({ type: 'timeout', target: script }); /******/ }, 120000); /******/ script.onerror = script.onload = onScriptComplete; /******/ document.head.appendChild(script); /******/ } /******/ } /******/ return Promise.all(promises); /******/ }; /******/ /******/ // expose the modules object (__webpack_modules__) /******/ __webpack_require__.m = modules; /******/ /******/ // expose the module cache /******/ __webpack_require__.c = installedModules; /******/ /******/ // define getter function for harmony exports /******/ __webpack_require__.d = function(exports, name, getter) { /******/ if(!__webpack_require__.o(exports, name)) { /******/ Object.defineProperty(exports, name, { enumerable: true, get: getter }); /******/ } /******/ }; /******/ /******/ // define __esModule on exports /******/ __webpack_require__.r = function(exports) { /******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) { /******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' }); /******/ } /******/ Object.defineProperty(exports, '__esModule', { value: true }); /******/ }; /******/ /******/ // create a fake namespace object /******/ // mode & 1: value is a module id, require it /******/ // mode & 2: merge all properties of value into the ns /******/ // mode & 4: return value when already ns object /******/ // mode & 8|1: behave like require /******/ __webpack_require__.t = function(value, mode) { /******/ if(mode & 1) value = __webpack_require__(value); /******/ if(mode & 8) return value; /******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value; /******/ var ns = Object.create(null); /******/ __webpack_require__.r(ns); /******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value }); /******/ if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key)); /******/ return ns; /******/ }; /******/ /******/ // getDefaultExport function for compatibility with non-harmony modules /******/ __webpack_require__.n = function(module) { /******/ var getter = module && module.__esModule ? /******/ function getDefault() { return module['default']; } : /******/ function getModuleExports() { return module; }; /******/ __webpack_require__.d(getter, 'a', getter); /******/ return getter; /******/ }; /******/ /******/ // Object.prototype.hasOwnProperty.call /******/ __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); }; /******/ /******/ // __webpack_public_path__ /******/ __webpack_require__.p = "dist/"; /******/ /******/ // on error function for async loading /******/ __webpack_require__.oe = function(err) { console.error(err); throw err; }; /******/ /******/ var jsonpArray = window["webpackJsonp"] = window["webpackJsonp"] || []; /******/ var oldJsonpFunction = jsonpArray.push.bind(jsonpArray); /******/ jsonpArray.push = webpackJsonpCallback; /******/ jsonpArray = jsonpArray.slice(); /******/ for(var i = 0; i < jsonpArray.length; i++) webpackJsonpCallback(jsonpArray[i]); /******/ var parentJsonpFunction = oldJsonpFunction; /******/ /******/ /******/ // Load entry module and return exports /******/ return __webpack_require__(__webpack_require__.s = 3); /******/ }) /************************************************************************/ ```
```javascript /******/ ([ /* 0 */, /* 1 */, /* 2 */, /* 3 */ /*!********************!*\ !*** ./example.js ***! \********************/ /*! no static exports found */ /***/ (function(module, exports, __webpack_require__) { async function getTemplate(templateName) { try { let template = await __webpack_require__(4)(`./${templateName}`); console.log(template); } catch(err) { console.error(err); return new Error(err); } } getTemplate("foo"); getTemplate("bar"); getTemplate("baz"); getTemplate("foo.noimport"); getTemplate("bar.noimport"); getTemplate("baz.noimport"); /***/ }), /* 4 */ /*!******************************************************************************************!*\ !*** ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ***! \******************************************************************************************/ /*! no static exports found */ /***/ (function(module, exports, __webpack_require__) { var map = { "./bar": [ 0, 0 ], "./bar.js": [ 0, 0 ], "./baz": [ 1, 1 ], "./baz.js": [ 1, 1 ], "./foo": [ 2, 2 ], "./foo.js": [ 2, 2 ] }; function webpackAsyncContext(req) { if(!__webpack_require__.o(map, req)) { return Promise.resolve().then(function() { var e = new Error("Cannot find module '" + req + "'"); e.code = 'MODULE_NOT_FOUND'; throw e; }); } var ids = map[req], id = ids[0]; return __webpack_require__.e(ids[1]).then(function() { return __webpack_require__(id); }); } webpackAsyncContext.keys = function webpackAsyncContextKeys() { return Object.keys(map); }; webpackAsyncContext.id = 4; module.exports = webpackAsyncContext; /***/ }) /******/ ]); ``` # Info ## Unoptimized ``` Hash: 0a1b2c3d4e5f6a7b8c9d Version: webpack 4.29.6 Asset Size Chunks Chunk Names 0.output.js 433 bytes 0 [emitted] 1.output.js 442 bytes 1 [emitted] 2.output.js 436 bytes 2 [emitted] output.js 9.45 KiB 3 [emitted] main Entrypoint main = output.js chunk {0} 0.output.js 38 bytes <{3}> [rendered] > ./bar [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar > ./bar.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar.js [0] ./templates/bar.js 38 bytes {0} [optional] [built] [exports: default] context element ./bar [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar context element ./bar.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar.js chunk {1} 1.output.js 38 bytes <{3}> [rendered] > ./baz [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz > ./baz.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz.js [1] ./templates/baz.js 38 bytes {1} [optional] [built] [exports: default] context element ./baz [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz context element ./baz.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz.js chunk {2} 2.output.js 38 bytes <{3}> [rendered] > ./foo [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo > ./foo.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo.js [2] ./templates/foo.js 38 bytes {2} [optional] [built] [exports: default] context element ./foo [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo context element ./foo.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo.js chunk {3} output.js (main) 597 bytes >{0}< >{1}< >{2}< [entry] [rendered] > ./example.js main [3] ./example.js 437 bytes {3} [built] single entry ./example.js main [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object 160 bytes {3} [optional] [built] import() context lazy ./templates [3] ./example.js 3:23-7:3 ``` ## Production mode ``` Hash: 0a1b2c3d4e5f6a7b8c9d Version: webpack 4.29.6 Asset Size Chunks Chunk Names 0.output.js 113 bytes 0 [emitted] 1.output.js 114 bytes 1 [emitted] 2.output.js 115 bytes 2 [emitted] output.js 2.52 KiB 3 [emitted] main Entrypoint main = output.js chunk {0} 0.output.js 38 bytes <{3}> [rendered] > ./bar [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar > ./bar.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar.js [0] ./templates/bar.js 38 bytes {0} [optional] [built] [exports: default] context element ./bar [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar context element ./bar.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./bar.js chunk {1} 1.output.js 38 bytes <{3}> [rendered] > ./baz [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz > ./baz.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz.js [1] ./templates/baz.js 38 bytes {1} [optional] [built] [exports: default] context element ./baz [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz context element ./baz.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./baz.js chunk {2} 2.output.js 38 bytes <{3}> [rendered] > ./foo [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo > ./foo.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo.js [2] ./templates/foo.js 38 bytes {2} [optional] [built] [exports: default] context element ./foo [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo context element ./foo.js [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object ./foo.js chunk {3} output.js (main) 597 bytes >{0}< >{1}< >{2}< [entry] [rendered] > ./example.js main [3] ./example.js 437 bytes {3} [built] single entry ./example.js main [4] ./templates lazy ^\.\/.*$ include: \.js$ exclude: \.noimport\.js$ namespace object 160 bytes {3} [optional] [built] import() context lazy ./templates [3] ./example.js 3:23-7:3 ```