webpack中CommonsChunkPlugin详细教程(小结)(4)

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 = "";
/******/ })
/************************************************************************/
/******/ ([]);


      

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