webpack4 + react 搭建多页面应用

摘要：升级到之后还没好好的同步一个可实用的架子，接下来用来搭建一个简单的的多界面应用，废话不说直接撸码创建工程目录结构工程目录结构配置安装依赖引入打开浏览器配置文件合并基础配置一些路径配置设置开发环境

webpack 升级到4之后还没好好的同步一个可实用的webpack架子，接下来用webpack4来搭建一个简单的react的多界面应用，废话不说 直接撸码

$ mkdir demo && cd demo
$ npm init -y

![工程目录结构][1]

安装react + babel 依赖

$ npm i -S react@16.3.0 react-dom@16.3.0

$ npm i -D webpack@4.4.1 webpack-cli@2.0.13 webpack-dev-server@3.1.1 webpack-merge@4.1.2 babel-cli@6.26.0 babel-preset-env@1.6.1 babel-preset-react@6.24.1 babel-preset-react-hmre@1.1.1 babel-loader@7.1.4 file-loader@1.1.11 url-loader@1.0.1

const entry = require("./webpack.entry.conf");
const newEntry = {};
for (let name in entry) {
    newEntry[name] = entry[name][0]
}
let config = {
    entry: newEntry,
    resolve: {
        extensions: [".js", ".json", ".jsx", ".css", ".pcss"],
    }
};
module.exports = config;

const webpack = require("webpack");//引入webpack
const opn = require("opn");//打开浏览器
const merge = require("webpack-merge");//webpack配置文件合并
const path = require("path");
const baseWebpackConfig = require("./webpack.base.conf");//基础配置
const webpackFile = require("./webpack.file.conf");//一些路径配置
const eslintFormatter = require("react-dev-utils/eslintFormatter");

let config = merge(baseWebpackConfig, {
    /*设置开发环境*/
    mode: "development",
    output: {
        path: path.resolve(webpackFile.devDirectory),
        filename: "js/[name].js",
        chunkFilename: "js/[name].js",
        publicPath: ""
    },
    optimization: {
        runtimeChunk: {
            name: "manifest"
        },
        // 包拆分
        splitChunks: {
            cacheGroups: {
                common: {   // 项目的公共组件
                    chunks: "initial",
                    name: "common",
                    minChunks: 2,
                    maxInitialRequests: 5,
                    minSize: 0
                },
                vendor: {   // 第三方组件
                    test: /node_modules/,
                    chunks: "initial",
                    name: "vendor",
                    priority: 10,
                    enforce: true
                }
            }
        }
    },
    plugins: [
        /*设置热更新*/
        new webpack.HotModuleReplacementPlugin(),
    ],
    module: {
        rules: [
            {
                test: /.(js|jsx)$/,
                use: [
                    "babel-loader",
                    "cache-loader",
                ],
                include: [
                    path.resolve(__dirname, "../../app"),
                    path.resolve(__dirname, "../../entryBuild")
                ],
                exclude: [
                    path.resolve(__dirname, "../../node_modules")
                ],
            },
            {
                test: /.(css|pcss)$/,
                loader: "style-loader?sourceMap!css-loader?sourceMap!postcss-loader?sourceMap",
                exclude: /node_modules/
            },
            {
                test: /.(png|jpg|gif|ttf|eot|woff|woff2|svg|swf)$/,
                loader: "file-loader?name=[name].[ext]&outputPath=" + webpackFile.resource + "/"
            },
            {
                test: /.(js|jsx)$/,
                enforce: "pre",
                use: [
                    {
                        options: {
                            formatter: eslintFormatter,
                            eslintPath: require.resolve("eslint"),
                            // @remove-on-eject-begin
                            baseConfig: {
                                extends: [require.resolve("eslint-config-react-app")],
                            },
                            //ignore: false,
                            useEslintrc: false,
                            // @remove-on-eject-end
                        },
                        loader: require.resolve("eslint-loader"),
                    },
                ],
                include: [
                    path.resolve(__dirname, "../../app")
                ],
                exclude: [
                    path.resolve(__dirname, "../../node_modules")
                ],
            }
        ]
    },
    /*设置api转发*/
    devServer: {
        host: "0.0.0.0",
        port: 8080,
        hot: true,
        inline: true,
        contentBase: path.resolve(webpackFile.devDirectory),
        historyApiFallback: true,
        disableHostCheck: true,
        proxy: [
            {
                context: ["/api/**", "/u/**"],
                target: "http://10.8.200.69:8080/",
                secure: false
            }
        ],
        /*打开浏览器 并打开本项目网址*/
        after() {
            opn("http://localhost:" + this.port);
        }
    }
});
module.exports = config;

const path = require("path");
const merge = require("webpack-merge");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const CleanWebpackPlugin = require("clean-webpack-plugin");
const OptimizeCSSPlugin = require("optimize-css-assets-webpack-plugin");
const ExtractTextPlugin = require("extract-text-webpack-plugin");
const baseWebpackConfig = require("./webpack.base.conf");
const webpackFile = require("./webpack.file.conf");
const entry = require("./webpack.entry.conf");
const webpackCom = require("./webpack.com.conf");

let config = merge(baseWebpackConfig, {
    /*设置生产环境*/
    mode: "production",
    output: {
        path: path.resolve(webpackFile.proDirectory),
        filename: "js/[name].[chunkhash:8].js",
        chunkFilename: "js/[name]-[id].[chunkhash:8].js",
    },
    optimization: {
        //包清单
        runtimeChunk: {
            name: "manifest"
        },
        //拆分公共包
        splitChunks: {
            cacheGroups: {
                common: { //项目公共组件
                    chunks: "initial",
                    name: "common",
                    minChunks: 2,
                    maxInitialRequests: 5,
                    minSize: 0
                },
                vendor: {   //第三方组件
                    test: /node_modules/,
                    chunks: "initial",
                    name: "vendor",
                    priority: 10,
                    enforce: true
                }
            }
        }
    },
    plugins: [
        // extract css into its own file
        new ExtractTextPlugin("css/[name].[md5:contenthash:hex:8].css"),
        // Compress extracted CSS. We are using this plugin so that possible
        // duplicated CSS from different components can be deduped.
        new OptimizeCSSPlugin({
            assetNameRegExp: /.css$/g,
            cssProcessor: require("cssnano"),
            cssProcessorOptions: {
                discardComments: {removeAll: true},
                // 避免 cssnano 重新计算 z-index
                safe: true
            },
            canPrint: true
        }),
    ],
    module: {
        rules: [
            {
                test: /.(js|jsx)$/,
                use: [
                    "babel-loader",
                ],
            },
            {
                test: /.(js|jsx)$/,
                loader: "babel-loader",
                exclude: /node_modules/,
            },
            {
                test: /.(css|pcss)$/,
                use: ExtractTextPlugin.extract({
                    fallback: "style-loader",
                    use: "css-loader!postcss-loader"
                })
            },
            {
                test: /.(png|jpg|gif|ttf|eot|woff|woff2|svg)$/,
                loader: "url-loader?limit=8192&name=[name].[hash:8].[ext]&publicPath=" + webpackFile.resourcePrefix + "&outputPath=" + webpackFile.resource + "/"
            },
            {
                test: /.swf$/,
                loader: "file?name=js/[name].[ext]"
            }
        ]
    }
});
let pages = entry;
for (let chunkName in pages) {
    let conf = {
        filename: chunkName + ".html",
        template: "index.html",
        inject: true,
        title: webpackCom.titleFun(chunkName,pages[chunkName][1]),
        minify: {
            removeComments: true,
            collapseWhitespace: true,
            removeAttributeQuotes: true
        },
        chunks: ["manifest", "vendor", "common", chunkName],
        hash: false,
        chunksSortMode: "dependency"
    };
    config.plugins.push(new HtmlWebpackPlugin(conf));
}
/* 清除 dist */
config.plugins.push(new CleanWebpackPlugin([webpackFile.proDirectory], {root: path.resolve(__dirname, "../../"), verbose: true, dry: false}));


/* 拷贝静态资源  */
copyArr.map(function (data) {
    return config.plugins.push(data)
});


module.exports = config;

整体架构搭建起来之后
app -> component 

$ mkdir demo && cd demo

$ touch Index.jsx

    import React from "react";

    class Index extends React.Component {
        render() {
            return (
                

                    写个demo
                
            );
        }
    }
    
    export default Index;
    

在config -> entry

module.exports = [
    {
        name: "index",
        path: "index/Index.jsx",
        title: "首页",
        keywords: "首页",
        description: "首页"
    },
    {
        name: "demo",
        path: "demo/Index.jsx",
        title: "demo",
        keywords: "demo",
        description: "demo"
    },
    {
        name: "demo1",
        path: "demo1/Index.jsx",
        title: "demo1",
        keywords: "demo1",
        description: "demo1"
    }
];

然后直接执行 npm run create-dev 就会在devBuild 和 entryBuild 中添加一个新的demo.html 和 demo.js

package.json

{
  "name": "webpack_es6",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "webpack-dev-server --devtool eval --progress --colors --profile --config config/webpack/webpack.dev.conf.js",
    "entry": "node config/entry/entryBuild.js",
    "devBuildHtml": "node config/webpack/webpack.devBuildHtml.conf.js",
    "create-dev": "npm run entry && npm run devBuildHtml",
    "build": "BABEL_ENV=production && webpack --progress --colors --config config/webpack/webpack.prod.conf.js",
    "test": "echo "Error: no test specified" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "react": "^16.3.0",
    "react-dom": "^16.3.0"
  },
  "devDependencies": {
    "babel-cli": "^6.26.0",
    "babel-eslint": "^8.2.2",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.6.1",
    "babel-preset-react": "^6.24.1",
    "babel-preset-react-hmre": "^1.1.1",
    "cache-loader": "^1.2.2",
    "clean-webpack-plugin": "^0.1.19",
    "copy-webpack-plugin": "^4.5.1",
    "css-loader": "^0.28.11",
    "eslint": "^4.19.1",
    "eslint-config-react-app": "^2.1.0",
    "eslint-loader": "^2.0.0",
    "eslint-plugin-flowtype": "^2.46.1",
    "eslint-plugin-import": "^2.10.0",
    "eslint-plugin-jsx-a11y": "^5.1.1",
    "eslint-plugin-react": "^7.7.0",
    "extract-text-webpack-plugin": "^4.0.0-beta.0",
    "file": "^0.2.2",
    "file-loader": "^1.1.11",
    "html-webpack-plugin": "^3.1.0",
    "optimize-css-assets-webpack-plugin": "^4.0.0",
    "postcss-cssnext": "^3.1.0",
    "postcss-loader": "^2.1.3",
    "precss": "^3.1.2",
    "react-dev-utils": "^5.0.0",
    "style-loader": "^0.20.3",
    "url-loader": "^1.0.1",
    "webpack": "^4.4.1",
    "webpack-cli": "^2.0.13",
    "webpack-dev-server": "^3.1.1",
    "webpack-merge": "^4.1.2"
  },
  "eslintConfig": {
    "extends": "react-app",
    "rules": {
      "import/no-webpack-loader-syntax": 0,
      "no-script-url": 0,
      "jsx-a11y/href-no-hash": 2
    }
  }
}

在开发环境添加cache-loader 可以提升在开发环境的编译速度