超级详细使用Webpack4.X 搭建H5开发环境
很久没弄博客了，这两天有点时间来搞一下最近在弄的webpack工具
webpack是什么东西我就不介绍了，因为我使用的webpack4以上版本，这个版本有一些较大的更新，可以自己去官网上找找看就知道了。
一、准备工作
node安装，这个百度、Google一下一大把，不做介绍
二、开始
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构建自己的目录结构，下图是我自己弄的目录结构：
1.png -
创建package.json文件，或者执行npm init 来生成
我的package.json文件如下：
{
"name": "h5Base", "version": "1.0.0", "description": "h5Base", "main": "index.js", "scripts": { "service": "http-server -p 8002", "build": "webpack --config ./webpack.config.js --mode production --env.NODE_ENV=production", "dev": "node webpack.dev.service" }, "author": "mjg", "license": "ISC", "devDependencies": { "babel-loader": "^7.1.4", "birdv3": "^0.3.33", "clean-webpack-plugin": "^0.1.19", "copy-webpack-plugin": "^4.5.1", "css-loader": "^0.28.11", "extract-text-webpack-plugin": "^4.0.0-beta.0", "file-loader": "^1.1.11", "html-loader": "^0.5.5", "html-webpack-plugin": "^3.2.0", "http-server": "^0.10.0", "mini-css-extract-plugin": "^0.2.0", "postcss-loader": "^2.1.3", "replace": "^0.3.0", "style-loader": "^0.20.3", "uglifyjs-webpack-plugin": "^1.2.4", "url-loader": "^1.0.1", "webpack": "^4.3.0", "webpack-cli": "^2.0.13", "webpack-dev-server": "^3.1.1", "webpack-merge": "^4.1.2" }, "dependencies": {} } OK，上面是我自己用到的一些库，如果有需要的朋友拷贝过去，然后执行npm install即可。
- 修改代码了
3.1 先在index.html里面随便添加点测试代码：
<!doctype html> <html lang=""> <head> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="Cache-Control " content="no-cache,must-revalidate"> <meta name="description" content=""> <meta http-equiv="content-type" content="text/html; charset=UTF-8" /> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1, maximum-scale=1"> <meta content="telephone=no" name="format-detection" /> <meta name="x5-orientation" content="portrait"> <title>demo title</title> </head> <body> <div class="root"> <h1>我是测试</h1> </div> </body> </html> 3.2 修改index.js代码：
import '../style/index.css' console.log('===================================='); console.log(1); console.log('===================================='); 3.3 修改index.css代码:
.root { background: red; width: 200px; height: 200px; margin: 0 auto; } - 代码处理完了，准备需要调试了，但是我们调试的话就需要启动服务，接下来我们就需要配置webpack的服务了
4.1 创建webpack.config.js
const webpack = require('webpack'); const path = require('path'); const ExtractTextPlugin = require('extract-text-webpack-plugin'); const HtmlWebpackPlugin = require('html-webpack-plugin'); const CleanWebpackPlugin = require('clean-webpack-plugin'); const CopyWebpackPlugin = require('copy-webpack-plugin'); const srcDir = path.join(__dirname, './src'); const distDir = path.join(__dirname, './dist'); module.exports = { entry: { index: [ 'webpack/hot/dev-server', 'webpack-dev-server/client?http://localhost:80', "./src/js/index.js" ] }, output: { path: path.resolve(__dirname, 'dist'), // 给js css 图片等在html引入中添加前缀 publicPath: "../../", filename: 'js/[name].min.js', }, devtool: 'source-map', module: { rules: [ { test: /\.html$/, use: [ { loader: "html-loader", options: { minimize: true } } ] }, { test: /\.js$/, exclude: /node_modules/, use: { loader: "babel-loader" } }, { test: /\.css$/, exclude: /node_modules/, use: ExtractTextPlugin.extract({ fallback: "style-loader", use: { loader: 'css-loader' }, }) }, { test: /\.(gif|jpg|png|woff|svg|eot|ttf)\??.*$/, loader: 'url-loader?limit=8192&name=img/[name].[ext]' } ] }, plugins: [ new CleanWebpackPlugin(['dist']), new ExtractTextPlugin('style/[name].min.css'), new HtmlWebpackPlugin({ hash: true, chunks: ['index'], template: "./src/pages/index/index.html", filename: "pages/index/index.html" }), new webpack.HotModuleReplacementPlugin(), ] }; 4.2 创建webpack.dev.service.js
var WebpackDevServer = require("webpack-dev-server"); var webpack = require("webpack"); var webpackConfig = require('./webpack.config.js'); var compiler = webpack(webpackConfig); var server = new WebpackDevServer(compiler, { hot: true, historyApiFallback: true, // It suppress error shown in console, so it has to be set to false. quiet: false, // It suppress everything except error, so it has to be set to false as well // to see success build. noInfo: false, stats: { // Config for minimal console.log mess. assets: false, colors: true, version: false, hash: false, timings: false, chunks: false, chunkModules: false }, // contentBase不要直接指向pages，因为会导致css、js支援加载不到 contentBase: __dirname + '/src/', }).listen(80, '0.0.0.0', function (err) { if (err) { console.log(err); } }); - 启动服务配置好了，在看看packag.json里面启动服务的命令：
"dev": "node webpack.dev.service"
那么在命令终端中输入： sudo npm run dev
ps：为什么加sudo?因为使用了80端口，所以加sudo，如果不使用80端口就不用加sudo
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在浏览器中输入：http://localhost/pages/index/index.html就可以看到效果了
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如果想打包正式上线，执行命令： npm run build就行，注意把webpack.config.js里面的一些sourceMap、entry里面的热更新去掉，当然自己重新搞一个线上的webpack.pro.config.js也可以，把一些开发调试功能去掉就行了
OK，以上就是我看到webpack4有更新后，随便搞得一个H5与webpack结合开发的工具，有问题欢迎随时提出！下一章讲说一下怎么使用webpack执行本地接口proxy，解决本地开发接口调试跨域问题
附上github地址：https://github.com/majianguang/h5Base
下一章，如何接入webpack的proxy跨域代理，以及允许绑定本地host调试的：https://www.jianshu.com/p/b3e0cc3863e6