欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

webpack配置的最佳实践分享

程序员文章站 2022-04-20 23:01:53
本文主要介绍了关于webpack配置的最佳实践,本文分享的实践具有以下的优势: 使用happypack提升打包速度。 使用md5 hash可以生成文件版本,...

本文主要介绍了关于webpack配置的最佳实践,本文分享的实践具有以下的优势:

  • 使用happypack提升打包速度。
  • 使用md5 hash可以生成文件版本,进行版本控制
  • 在非单页面的系统中支持多个入口的配置
  • 模板中可以利用htmlplugin输出一些配置性的信息
  • 支持devserver,支持本地json数据的mock

一、webpack最佳实践中的需求

     1.热加载

     2.语法校验

     3.js打包

     4.模板打包

二、解决方案

1.webpack.config.json

var path = require('path');
var fs = require('fs');
var exec = require('child_process').exec;
var happypack = require('happypack');
var merge = require('webpack-merge');
var webpack = require('webpack');
var webpackmd5hash = require('webpack-md5-hash');
var htmlwebpackplugin = require('html-webpack-plugin');
var root_path = path.resolve(__dirname);
var app_path = path.resolve(root_path, 'app');
var build_path = path.resolve(root_path, __dirname+'/devserver/public');
//取出页面文件映射
function gethtmlpluginarr() {
 var data = json.parse(fs.readfilesync('entryconf.json', 'utf-8'));
 var pagelist = data.pagelist;
 var resultobj = {
 "pluginarr": [],
 "entryobj": {}
 };
 for (var index = 0; index < pagelist.length; index++) {
 var element = pagelist[index];
 var entry = element.entry;
 //通过对app.json中src的路径截取获得分发路径
 var filename = (function () {
 var filenamestr = entry.split("./app/page/")[1];
 return filenamestr.substr(0, filenamestr.lastindexof("."));
 })();
 var title = element.title;
 var extra = element.extra;
 resultobj.entryobj[filename] = entry;
 //利用路径一部分来进行htmlwebpackplugin的chunks
 resultobj.pluginarr.push(
 new htmlwebpackplugin({
  chunks: [filename], //当前页面js
  title: title,
  extra: extra,//包含页面额外的配置信息
  template: "app/" + "template.ejs",
  filename: 'views/'+filename + '.ejs',
  chunkssortmode: "dependency"//按chunks的顺序对js进行引入
 })
 );
 //happypack, loader多进程去处理文件
 resultobj.pluginarr.push(
 new happypack({ id: 'html' }),
 new happypack({ id: 'css' }),
 new happypack({ id: 'js' }),
 new happypack({ id: 'tpl' })
 );
 }
 return resultobj;
}
var appjsonobj = gethtmlpluginarr();
/**通用配置 */
var commonconfig = {
 entry: appjsonobj.entryobj,
 module: {
 loaders: [
 { test: /\.html$/, loader: "html?minimize=false", happy: {id: "html"} },
 { test: /\.json$/, loader: "json" },
 { test: /\.scss|\.css$/, loaders: ["style", "css", "sass"], happy: {id: "css"} },
 { test: /\.(?:jpg|gif|png)$/, loader: 'url?limit=10240&name=images/[name]-[hash:10].[ext]' },
 { test: /\.handlebars/, loader: "handlebars", query: { helperdirs: [app_path + "/helper"] }, happy: {id: "tpl"} },
 { test: /\.js$|\.jsx$/, exclude: /(node_modules|bower_components)/, loader: 'babel', query: { presets: ['es2015'] }, happy: {id: "js"} },
 ]
 },
 output: {
 path: build_path,
 filename: "js/[name].js"
 },
 externals: {
 "jquery": "jquery"
 },
 //配置短路径引用
 resolve: {
 extensions: ['', '.js', '.json', '.scss','.vue'],
 alias: {
 vue : 'vue/dist/vue.js'
 }
 },
 plugins: appjsonobj.pluginarr,
 cache: true
}
module.exports = merge(commonconfig, {
 output: {
 publicpath: '/',
 path: build_path,
 filename: "js/[name]-[chunkhash:10].js"
 },
 plugins: [
 new webpack.optimize.uglifyjsplugin({ minimize: true }),
 new webpackmd5hash()
 ]
});

2.模板文件的配置:

<!doctype html>
<html>
<head>
 <meta charset="utf-8">
 <title>
 <%= htmlwebpackplugin.options.title || '上单'%>
 </title>
</head>
<body>
 <div id="main-container"></div>
 <% if (htmlwebpackplugin.options.extra&&htmlwebpackplugin.options.extra.js) {%>
 <% for(var i = 0;i < htmlwebpackplugin.options.extra.js.length;i++){ %>
 <script src="<%= htmlwebpackplugin.options.extra.js[i] %>"></script>
 <% } %>
 <% } %>
</body>
<script src="//cdn.bootcss.com/jquery/2.2.3/jquery.min.js"></script>
</html>

3.webpack.dev.config.json配置

var path = require('path');
var fs = require('fs');
var merge = require('webpack-merge');
var webpack = require('webpack');
var htmlwebpackplugin = require('html-webpack-plugin');
var openbrowserplugin = require('open-browser-webpack-plugin');
var root_path = path.resolve(__dirname);
var app_path = path.resolve(root_path, 'app');
var build_path = path.resolve(root_path, 'build');
var module_path = path.resolve(root_path, 'node_modules');
//取出页面文件映射
function gethtmlpluginarr() {
 var data = json.parse(fs.readfilesync('app/entries.json', 'utf-8'));
 var pagelist = data.pagelist;
 var resultobj = {
 "pluginarr": [],
 "entryobj": {}
 };
 for (var index = 0; index < pagelist.length; index++) {
 var element = pagelist[index];
 var src = element.entry;
 //通过对app.json中src的路径截取获得分发路径
 var dist = (function() {
 var s1 = src.split("./app/entries/")[1];
 var s2 = s1.substr(0, s1.lastindexof("/"));
 return s2;
 })();
 var title = element.title;
 var extra = element.extra;
 resultobj.entryobj[dist] = src;
 //利用路径一部分来进行htmlwebpackplugin的chunks
 resultobj.pluginarr.push(
 new htmlwebpackplugin({
 chunks: [dist], //当前页面js
 title: title,
 extra: extra,//包含页面额外的配置信息
 template: "app/" + "template.ejs",
 filename: dist + '.html',
 chunkssortmode: "dependency" //按chunks的顺序对js进行引入
 })
 );
 }
 return resultobj;
}
var appjsonobj = gethtmlpluginarr();
/**通用配置 */
var commonconfig = {
 entry: appjsonobj.entryobj,
 module: {
 loaders: [
 { test: /\.html$/, loader: "html?minimize=false" },
 { test: /\.json$/, loader: "json" },
 { test: /\.scss|\.css$/, loaders: ["style", "css", "sass"] },
 { test: /\.(?:jpg|gif|png)$/, loader: 'url?limit=10240&name=../images/[name]-[hash:10].[ext]' },
 { test: /\.handlebars/, loader: "handlebars" },
 { test: /\.js$/, exclude: /(node_modules|bower_components)/, loader: 'babel', query: { presets: ['es2015','stage-3','react'] } },
 { test: /\.jsx$/, exclude: /(node_modules|bower_components)/, loader: 'babel', query: { presets: ['react','stage-3','es2015']} }
 ]
 },
 output: {
 path: build_path,
 filename: "js/[name].js"
 },
 externals: {
 "jquery": "jquery"
 },
 //配置短路径引用
 resolve: {
 alias: {
 module: path.resolve(app_path, 'module'),
 service: path.resolve(app_path, "services"),
 component: path.resolve(app_path, "components"),
 entries: path.resolve(app_path, "entries"),
 routes: path.resolve(app_path, "routes"),
 node_modules: path.resolve(root_path, 'node_modules')
 },
 extensions: ['', '.js', '.jsx']
 },
 plugins: appjsonobj.pluginarr,
 devtool: "cheap-source-map",
 cache: true
}
//webpack-dev-server 提供的是内存级别的server,不会生成build的文件夹
//访问路径直接参照build下的路径 如http://127.0.0.1:8080/shop/updateshop.html
module.exports = merge(commonconfig, {
 devserver: {
 hot: true,
 inline: true,
 progress: true,
 host: process.env.host,
 port: "8808",
 proxy: {
 '/api/getleftbar': {
 target: 'http://127.0.0.1:8808/mock',//dev
 secure: false
 },
 '/api/getindexdata': {
 target: 'http://127.0.0.1:8808/mock',//dev
 secure: false
 },
 '/api/getblogs': {
 target: 'http://127.0.0.1:8808/mock',//dev
 secure: false
 },
 '/panda/*': {
 target: 'http://10.4.233.139:8411/',//dev
 secure: false
 },
 //转发至本地mock
 '/page3/*': {
 target: 'http://127.0.0.1:8808',
 secure: false
 }
 }
 },
 plugins: [
 new webpack.hotmodulereplacementplugin(),
 new openbrowserplugin({
 url: 'http://127.0.0.1:8808/test.html'
 })
 ]
});

总结

以上就是关于webpack最佳配置的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对的支持。