webpack CommonsChunkPlugin详细教程
1.demo结构:
2.package.json配置:
{
"name": "webpack-simple-demo",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"webpack": "webpack"
},
"author": "",
"license": "ISC",
"dependencies": {
"jquery": "^3.1.0",
"vue": "^1.0.26"
},
"devDependencies": {
"css-loader": "^0.24.0",
"style-loader": "^0.13.1",
"webpack": "^1.13.2",
"webpack-dev-server": "^1.15.1"
}
}
3.多种打包情况(未使用CommonsChunkPlugin)
(1)单一入口,模块单一引用
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
},
output: {
path:__dirname+'/dist',
filename: 'build.js'
},
plugins: [
]
};
main.js
require("jquery");
demo目录下运行命令行 webpack或npm run webpack
jquery模块被一起打包到build.js
(2)单一入口,模块重复引用
webpack.config.js不变,main.js:
require("./chunk1");
require("./chunk2");
chunk1.js:
require("./chunk2");
var chunk1=1;
exports.chunk1=chunk1;
chunk2.js:
var chunk2=1;
exports.chunk2=chunk2;
main.js引用了chunk1、chunk2,chunk1又引用了chunk2,打包后:
build.js:
...省略webpack生成代码
/************************************************************************/
/******/ ([
/* 0 */
/***/ function(module, exports, __webpack_require__) {
__webpack_require__(1);
__webpack_require__(2);
/***/ },
/* 1 */
/***/ function(module, exports, __webpack_require__) {
__webpack_require__(2);
var chunk1=1;
exports.chunk1=chunk1;
/***/ },
/* 2 */
/***/ function(module, exports) {
var chunk2=1;
exports.chunk2=chunk2;
/***/ }
/******/ ]);
(3)多入口,模块单一引用,分文件输出
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
main1:'./main1.js'
},
output: {
path:__dirname+'/dist',
filename: '[name].js'
},
plugins: [
]
};
打包后文件main.js,main1.js 内容与(2)build.js一致
(4)多入口,模块单一引用,单一文件输出
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
main1:'./main1.js'
},
output: {
path:__dirname+'/dist',
filename: 'buid.js'
},
plugins: [
]
};
build.js与(2)一致
(5)多入口,模块重复引用,单文件输出
webpack.config.js与(4)一致
main.js
require("./chunk1");
require("./chunk2");
exports.main=1;
main1.js
require("./chunk1");
require("./chunk2");
require("./main");
报错:ERROR in ./main1.js
Module not found: Error: a dependency to an entry point is not allowed
@ ./main1.js 3:0-17
4.使用CommonsChunkPlugin
(1)单一入口,模块单一引用,分文件输出:
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,这输出文件中只用chunk.js的内容,
main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
})
]
};
main.js
require("./chunk1");
require("./chunk2");
require("jquery");
输出文件main.js chunk.js,chunk1.js,chunck2.js,jquery都被打包到main.js里,好像并没有什么卵用,但是页面上使用的时候chunk.js必须在mian.js前引用
将chunk1.js,chunck2.js打包到chunk.js:
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
chunk: ["./chunk1", "./chunk2"],//插件中name,filename必须以这个key为值
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
// filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
})
]
};
(1)单一入口,模块重复引用,分文件输出(单一入口CommonsChunkPlugin能否将多次引用的模块打包到公共模块呢?):
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
//main1:'./main1.js',
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
// filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
minChunks:2
})
]
};
main.js
require("./chunk1");
require("./chunk2");
chunk1.js
require("./chunk2");
var chunk1=1;
exports.chunk1=chunk1;
chunk2模块被引用了两次
打包后,所有模块还是被打包到main.js中
(3)多入口,模块重复引用,分文件输出(将多次引用的模块打包到公共模块)
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
main1:'./main1.js',
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
// filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
minChunks:2
})
]
};
main.js,main1.js里都引用chunk1,chunk2.
打包后:
chunk1,chunk2被打包到chunk.js,不再像3(3)chunk1,chunk2分别被打包到mian,mian1中。
5.将公共业务模块与类库或框架分开打包
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
common1: ['jquery'],
common2: ['vue']
},
output: {
path: __dirname + '/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
//这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name: ["chunk","common1","common2"],//页面上使用的时候common2
//必须最先加载
// filename:"chunk.js"//忽略则以name为输出文件的名字,
//否则以此为输出文件名字
minChunks: 2
})
]
};
jquery被打包到common1.js,vue被打包到common2.js,chunk.js打包的是公共的业务模块(webpack用插件CommonsChunkPlugin进行打包的时候,将符合引用次数(minChunks)的模块打包到name参数的数组的第一个块里(chunk),然后数组后面的块依次打包(查找entry里的key,没有找到相关的key就生成一个空的块),最后一个块包含webpack生成的在浏览器上使用各个块的加载代码,所以页面上使用的时候最后一个块必须最先加载)
将webpack.config.js改为
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
jquery:["jquery"],
vue:["vue"]
},
output: {
path: __dirname + '/dist',
filename: '[name].js'
},
plugins: [
new CommonsChunkPlugin({
name: ["common","jquery","vue","load"],
minChunks:2
})
]
};
main.js
require("./chunk1");
require("./chunk2");
var jq=require("jquery");
console.log(jq);
main1.js
require("./chunk1");
require("./chunk2");
var vue=require("vue");
console.log(vue);
exports.vue=vue;
打包后
common.js
webpackJsonp([4,5],[
/* 0 */,
/* 1 */,
/* 2 */
/***/ function(module, exports, __webpack_require__) {
__webpack_require__(3);
var chunk1=1;
exports.chunk1=chunk1;
/***/ },
/* 3 */
/***/ function(module, exports) {
var chunk2=1;
exports.chunk2=chunk2;
/***/ }
]);
相当于公共的业务代码都打包到了common.js里
load.js
/******/ (function(modules) { // webpackBootstrap
/******/ // install a JSONP callback for chunk loading
/******/ var parentJsonpFunction = window["webpackJsonp"];
/******/ window["webpackJsonp"] = function webpackJsonpCallback(chunkIds, moreModules) {
/******/ // add "moreModules" to the modules object,
/******/ // then flag all "chunkIds" as loaded and fire callback
/******/ var moduleId, chunkId, i = 0, callbacks = [];
/******/ for(;i < chunkIds.length; i++) {
/******/ chunkId = chunkIds[i];
/******/ if(installedChunks[chunkId])
/******/ callbacks.push.apply(callbacks, installedChunks[chunkId]);
/******/ installedChunks[chunkId] = 0;
/******/ }
/******/ for(moduleId in moreModules) {
/******/ modules[moduleId] = moreModules[moduleId];
/******/ }
/******/ if(parentJsonpFunction) parentJsonpFunction(chunkIds, moreModules);
/******/ while(callbacks.length)
/******/ callbacks.shift().call(null, __webpack_require__);
/******/ if(moreModules[0]) {
/******/ installedModules[0] = 0;
/******/ return __webpack_require__(0);
/******/ }
/******/ };
/******/ // The module cache
/******/ var installedModules = {};
/******/ // object to store loaded and loading chunks
/******/ // "0" means "already loaded"
/******/ // Array means "loading", array contains callbacks
/******/ var installedChunks = {
/******/ 5:0
/******/ };
/******/ // 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] = {
/******/ exports: {},
/******/ id: moduleId,
/******/ loaded: false
/******/ };
/******/ // Execute the module function
/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/ // Flag the module as loaded
/******/ module.loaded = 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, callback) {
/******/ // "0" is the signal for "already loaded"
/******/ if(installedChunks[chunkId] === 0)
/******/ return callback.call(null, __webpack_require__);
/******/ // an array means "currently loading".
/******/ if(installedChunks[chunkId] !== undefined) {
/******/ installedChunks[chunkId].push(callback);
/******/ } else {
/******/ // start chunk loading
/******/ installedChunks[chunkId] = [callback];
/******/ var head = document.getElementsByTagName('head')[0];
/******/ var script = document.createElement('script');
/******/ script.type = 'text/javascript';
/******/ script.charset = 'utf-8';
/******/ script.async = true;
/******/ script.src = __webpack_require__.p + "" + chunkId + "." + ({"0":"jquery","1":"main","2":"main1","3":"vue","4":"common"}[chunkId]||chunkId) + ".js";
/******/ head.appendChild(script);
/******/ }
/******/ };
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = modules;
/******/ // expose the module cache
/******/ __webpack_require__.c = installedModules;
/******/ // __webpack_public_path__
/******/ __webpack_require__.p = "";
/******/ })
/************************************************************************/
/******/ ([]);
使用的时候必须最先加载load.js
6.参数minChunks: Infinity
看一下下面的配置会是什么结果
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
jquery:["jquery"]
},
output: {
path: __dirname + '/dist',
filename: '[name].js'
},
plugins: [
new CommonsChunkPlugin({
name: "jquery",
minChunks:2
})
]
};
main.js,main1.js共同引用的chunk1和chunk2会被打包到jquery.js里
minChunks:2修改为minChunks:Infinity后,chunk1和chunk2都打包到main.js,main1.js里
7.参数chunks
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
jquery:["jquery"]
},
output: {
path: __dirname + '/dist',
filename: '[name].js'
},
plugins: [
new CommonsChunkPlugin({
name: "jquery",
minChunks:2,
chunks:["main","main1"]
})
]
};
只有在main.js和main1.js中都引用的模块才会被打包的到公共模块(这里即jquery.js)
---恢复内容结束---
###1.demo结构: ![](//upload-images.jianshu.io/upload_images/2125695-12d6fb8aec5c1dfd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240) ###2.package.json配置: ``` { "name": "webpack-simple-demo", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "webpack": "webpack" }, "author": "", "license": "ISC", "dependencies": { "jquery": "^3.1.0", "vue": "^1.0.26" }, "devDependencies": { "css-loader": "^0.24.0", "style-loader": "^0.13.1", "webpack": "^1.13.2", "webpack-dev-server": "^1.15.1" } } ``` ###3.多种打包情况(未使用CommonsChunkPlugin) ####(1)单一入口,模块单一引用 webpack.config.js ``` var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin"); module.exports = { entry: { main:'./main.js', }, output: { path:__dirname+'/dist', filename: 'build.js' }, plugins: []
};
main.js
require("jquery");
demo目录下运行命令行 webpack或npm run webpack
![](//upload-images.jianshu.io/upload_images/2125695-8aa6da95a1f4191a.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
jquery模块被一起打包到build.js
####(2)单一入口,模块重复引用
webpack.config.js不变,main.js:
require("./chunk1");
require("./chunk2");
chunk1.js:
require("./chunk2");
var chunk1=1;
exports.chunk1=chunk1;
chunk2.js:
var chunk2=1;
exports.chunk2=chunk2;
main.js引用了chunk1、chunk2,chunk1又引用了chunk2,打包后:
build.js:
...省略webpack生成代码
/***************************************************************/
// ([
/ 0 /
// function(module, exports, webpack_require) {
__webpack_require__(1);
__webpack_require__(2);
// },
/ 1 /
// function(module, exports, webpack_require) {
__webpack_require__(2);
var chunk1=1;
exports.chunk1=chunk1;
// },
/ 2 /
// function(module, exports) {
var chunk2=1;
exports.chunk2=chunk2;
// }
/***/ ]);
####(3)多入口,模块单一引用,分文件输出
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
main1:'./main1.js'
},
output: {
path:__dirname+'/dist',
filename: '[name].js'
},
plugins: [
]
};
打包后文件main.js,main1.js 内容与(2)build.js一致
####(4)多入口,模块单一引用,单一文件输出
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
main1:'./main1.js'
},
output: {
path:__dirname+'/dist',
filename: 'buid.js'
},
plugins: [
]
};
build.js与(2)一致
####(5)多入口,模块重复引用,单文件输出
webpack.config.js与(4)一致
main.js
require("./chunk1");
require("./chunk2");
exports.main=1;
main1.js
require("./chunk1");
require("./chunk2");
require("./main");
报错:ERROR in ./main1.js
Module not found: Error: a dependency to an entry point is not allowed
@ ./main1.js 3:0-17
###4.使用CommonsChunkPlugin
(1)单一入口,模块单一引用,分文件输出:
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,这输出文件中只用chunk.js的内容,
main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
})
]
};
main.js
require("./chunk1");
require("./chunk2");
require("jquery");
![](//upload-images.jianshu.io/upload_images/2125695-80c6450f282c71ec.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
输出文件main.js chunk.js,chunk1.js,chunck2.js,jquery都被打包到main.js里,好像并没有什么卵用,但是页面上使用的时候chunk.js必须在mian.js前引用
将chunk1.js,chunck2.js打包到chunk.js:
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
chunk: ["./chunk1", "./chunk2"],//插件中name,filename必须以这个key为值
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
// filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
})
]
};
![](//upload-images.jianshu.io/upload_images/2125695-ee4302704803a8a6.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
####(1)单一入口,模块重复引用,分文件输出(单一入口CommonsChunkPlugin能否将多次引用的模块打包到公共模块呢?):
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
//main1:'./main1.js',
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
// filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
minChunks:2
})
]
};
main.js
require("./chunk1");
require("./chunk2");
chunk1.js
require("./chunk2");
var chunk1=1;
exports.chunk1=chunk1;
chunk2模块被引用了两次
打包后,所有模块还是被打包到main.js中
####(3)多入口,模块重复引用,分文件输出(将多次引用的模块打包到公共模块)
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry:
{
main:'./main.js',
main1:'./main1.js',
},
output: {
path:__dirname+'/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name:"chunk",
// filename:"chunk.js"//忽略则以name为输出文件的名字,否则以此为输出文件名字
minChunks:2
})
]
};
main.js,main1.js里都引用chunk1,chunk2.
打包后:
chunk1,chunk2被打包到chunk.js,不再像3(3)chunk1,chunk2分别被打包到mian,mian1中。
###5.将公共业务模块与类库或框架分开打包
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
common1: ['jquery'],
common2: ['vue']
},
output: {
path: __dirname + '/dist',
filename: '[name].js'//不使用[name],并且插件中没有filename,
//这输出文件中只用chunk.js的内容,main.js的内容不知跑哪里去了
},
plugins: [
new CommonsChunkPlugin({
name: ["chunk","common1","common2"],//页面上使用的时候common2
//必须最先加载
// filename:"chunk.js"//忽略则以name为输出文件的名字,
//否则以此为输出文件名字
minChunks: 2
})
]
};
![](//upload-images.jianshu.io/upload_images/2125695-c393f6cb60aed289.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
jquery被打包到common1.js,vue被打包到common2.js,chunk.js打包的是公共的业务模块(webpack用插件CommonsChunkPlugin进行打包的时候,将符合引用次数(minChunks)的模块打包到name参数的数组的第一个块里(chunk),然后数组后面的块依次打包(查找entry里的key,没有找到相关的key就生成一个空的块),最后一个块包含webpack生成的在浏览器上使用各个块的加载代码,所以页面上使用的时候最后一个块必须最先加载)
将webpack.config.js改为
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
jquery:["jquery"],
vue:["vue"]
},
output: {
path: __dirname + '/dist',
filename: '[name].js'
},
plugins: [
new CommonsChunkPlugin({
name: ["common","jquery","vue","load"],
minChunks:2
})
]
};
main.js
require("./chunk1");
require("./chunk2");
var jq=require("jquery");
console.log(jq);
main1.js
require("./chunk1");
require("./chunk2");
var vue=require("vue");
console.log(vue);
exports.vue=vue;
打包后
![](//upload-images.jianshu.io/upload_images/2125695-d053503532733508.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
common.js
webpackJsonp([4,5],[
/* 0 /,
/ 1 /,
/ 2 /
/**/ function(module, exports, webpack_require) {
__webpack_require__(3);
var chunk1=1;
exports.chunk1=chunk1;
// },
/ 3 /
// function(module, exports) {
var chunk2=1;
exports.chunk2=chunk2;
/***/ }
]);
相当于公共的业务代码都打包到了common.js里
load.js
// (function(modules) { // webpackBootstrap
// // install a JSONP callback for chunk loading
// var parentJsonpFunction = window["webpackJsonp"];
// window["webpackJsonp"] = function webpackJsonpCallback(chunkIds, moreModules) {
// // add "moreModules" to the modules object,
// // then flag all "chunkIds" as loaded and fire callback
// var moduleId, chunkId, i = 0, callbacks = [];
// for(;i < chunkIds.length; i++) {
// chunkId = chunkIds[i];
// if(installedChunks[chunkId])
// callbacks.push.apply(callbacks, installedChunks[chunkId]);
// installedChunks[chunkId] = 0;
// }
// for(moduleId in moreModules) {
// modules[moduleId] = moreModules[moduleId];
// }
// if(parentJsonpFunction) parentJsonpFunction(chunkIds, moreModules);
// while(callbacks.length)
// callbacks.shift().call(null, webpack_require);
// if(moreModules[0]) {
// installedModules[0] = 0;
// return webpack_require(0);
// }
// };
// // The module cache
// var installedModules = {};
// // object to store loaded and loading chunks
// // "0" means "already loaded"
// // Array means "loading", array contains callbacks
// var installedChunks = {
// 5:0
// };
// // 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] = {
// exports: {},
// id: moduleId,
// loaded: false
// };
// // Execute the module function
// modules[moduleId].call(module.exports, module, module.exports, webpack_require);
// // Flag the module as loaded
// module.loaded = 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, callback) {
// // "0" is the signal for "already loaded"
// if(installedChunks[chunkId] === 0)
// return callback.call(null, webpack_require);
// // an array means "currently loading".
// if(installedChunks[chunkId] !== undefined) {
// installedChunks[chunkId].push(callback);
// } else {
// // start chunk loading
// installedChunks[chunkId] = [callback];
// var head = document.getElementsByTagName('head')[0];
// var script = document.createElement('script');
// script.type = 'text/javascript';
// script.charset = 'utf-8';
/******/ script.async = true;
// script.src = webpack_require.p + "" + chunkId + "." + ({"0":"jquery","1":"main","2":"main1","3":"vue","4":"common"}[chunkId]||chunkId) + ".js";
// head.appendChild(script);
// }
// };
// // expose the modules object (webpack_modules)
// webpack_require.m = modules;
// // expose the module cache
// webpack_require.c = installedModules;
// // webpack_public_path
// webpack_require.p = "";
// })
/************************************************************/
// ([]);
使用的时候必须最先加载load.js
###6.参数minChunks: Infinity
看一下下面的配置会是什么结果
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
jquery:["jquery"]
},
output: {
path: __dirname + '/dist',
filename: '[name].js'
},
plugins: [
new CommonsChunkPlugin({
name: "jquery",
minChunks:2
})
]
};
![](//upload-images.jianshu.io/upload_images/2125695-ab6cac77d9eaa278.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
main.js,main1.js共同引用的chunk1和chunk2会被打包到jquery.js里
minChunks:2修改为minChunks:Infinity后,chunk1和chunk2都打包到main.js,main1.js里
###7.参数chunks
webpack.config.js
var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
module.exports = {
entry: {
main: './main.js',
main1: './main1.js',
jquery:["jquery"]
},
output: {
path: __dirname + '/dist',
filename: '[name].js'
},
plugins: [
new CommonsChunkPlugin({
name: "jquery",
minChunks:2,
chunks:["main","main1"]
})
]
};
只有在main.js和main1.js中都引用的模块才会被打包的到公共模块(这里即jquery.js)