webpack从0开始手动搭建react + typeScrip

1. 初始化

yarn init

2. 安装依赖

react

yarn add react react-dom

React 类型库

yarn add --dev @types/react @types/react-dom

typeScript 和 ts-loader

yarn add --dev typescript ts-loader

Webpack

yarn add --dev webpack webpack-cli webpack-dev-server webpack-merge

Webpack插件

yarn add --dev source-map-loader html-webpack-plugin clean-webpack-plugin uglifyjs-webpack-plugin

3. webpack配置

• config文件夹，定义变量./config/index.js 区分开发和生产环境

  其中 env: require('./dev.env') =>为开发环境最后传入web中使用环境变量./config/dev.env.js

  env: require('./prod.env') =>为生产环境最后传入web中使用环境变量./config/dev.prod.js

  const path = require('path')
  
  module.exports = {
      dev: {
          env: require('./dev.env'),
          host: 'localhost',
          port: 8888,
          assetsRoot: path.resolve(__dirname, '../dist'),
          assetsPublicPath: '/',
      },
      prod: {
          env: require('./prod.env'),
          assetsRoot: path.resolve(__dirname, '../dist'),
          assetsPublicPath: '/',
      }
  };
  

  module.exports = {
      NODE_ENV: JSON.stringify('development')
  };
  

  module.exports = {
      NODE_ENV: JSON.stringify('production')
  };
  

• 基础webpack 配置 ./build/webpack.base.conf.js

  const webpack = require('webpack')
  const HtmlWebpackPlugin = require('html-webpack-plugin')
  const path = require('path');
  
  const config = require('../config')
  
  const ENV = process.env.NODE_ENV || "development";
  const devMode = ENV === "development";
  
  module.exports = {
      mode: devMode ? "development" : "production",
      devtool: devMode ? "#source-map" : "inline-source-map",
      resolve: {
          extensions: ['.tsx', '.ts', '.js', '.json'],
          alias: {
              '@': path.resolve(__dirname, '../src')
          }
      },
      entry: './src/index.tsx',
      output: {
          path: config.prod.assetsRoot,
          publicPath: devMode ? config.dev.assetsPublicPath : config.prod.assetsPublicPath,
          filename: `js/[name]${devMode ? '' : '-bundle-[hash:8]'}.js`,// 文件名,不加hash,以方便调试时使用，生产环境下可以设置为 [name]-bundle-[hash:8].js
      },
      module: {
          rules: [
          {
              enforce: "pre",
              test: /\.js$/,
              loader: "source-map-loader"
          },
          {
              test: /\.(ts|tsx)$/,
              loader: "ts-loader",
          },
          ],
      },
      plugins: [
          new HtmlWebpackPlugin({
              title: 'React + Typescript demo',
              template: './index.html',
              inject: false,
          }),
          new webpack.DefinePlugin({
              'process.env': devMode ? config.dev.env : config.prod.env
          }),
      ],
  }
  

• 开发环境webpack 配置 ./build/webpack.dev.conf.js

  const webpack = require('webpack')
  const webpackMerge = require('webpack-merge')
  
  const baseConfig = require('./webpack.base.conf');
  const config = require('../config')
  
  const devConfig = {
      devServer: {
          historyApiFallback: true,// 在开发单页应用时非常有用，它依赖于HTML5 history API，如果设置为true，所有的跳转将指向index.html
          disableHostCheck: true,// 关闭 Host 检查，同网段其他设备，可通过内网 IP 访问本机服务（需要配合 host: '0.0.0.0'）使用
          hot: true, // 模块热更新，取决于HotModuleReplacementPlugin
          host: config.dev.host,
          port: config.dev.port,
          open: true,
          inline: true,
          overlay: true,
          watchOptions: {
              ignored: /node_modules/,
          },
          // 请求代理服务
          // proxy: {
          //   '/api': {
          //     // 这里改为项目后端 API 接口 Host
          //     target: 'http://backend.api.host',
          //     // 支持跨域调用
          //     changeOrigin: true,
          //   }
          // }
      },
      plugins: [
          new webpack.HotModuleReplacementPlugin(),
          new webpack.NamedModulesPlugin()
      ],
  }
  module.exports = webpackMerge(devConfig, baseConfig);
  

• 开发环境webpack 配置 ./build/webpack.prod.conf.js

  const webpackMerge = require('webpack-merge');
  const CleanWebpackPlugin = require('clean-webpack-plugin').CleanWebpackPlugin; //"clean-webpack-plugin": "^3.0.0"
  const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
  
  const baseConfig = require('./webpack.base.conf');
  
  const prodConfig = {
      plugins: [
          new UglifyJsPlugin({
              uglifyOptions: {
                  warnings: false
              },
              cache: true,
              parallel: true,
              sourceMap: true
          }),
          // 每次编译之前，清空上一次编译的文件
          new CleanWebpackPlugin()
      ],
  }
  module.exports = webpackMerge(prodConfig, baseConfig);
  

4. tsconfig.json文件配置

{
  "compilerOptions": {
    "allowSyntheticDefaultImports": true, 
    "jsx": "react",
    "lib": ["es6", "dom"],
    "module": "esnext",
    "moduleResolution": "node",
    "noImplicitAny": true,
    "rootDir": "src",
    "sourceMap": true,
    "strict": true,
    "target": "es5"
  },
  "exclude": [
    "node_modules",
    "build"
  ]
}

allowSyntheticDefaultImports: 允许合成默认导出

import * as React from 'react'
=>
import React from 'react'

5. 入口文件

• ./index.html

  <!DOCTYPE html>
  <html lang="en">
  <head>
      <meta charset="utf-8">
      <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
      <title><%= htmlWebpackPlugin.options.title %></title>
      <% for (let css in htmlWebpackPlugin.files.css) { %>
      <link href="/<%=htmlWebpackPlugin.files.css[css] %>" rel="stylesheet">
      <% } %>
  </head>
  <body>
      <noscript>
      You need to enable JavaScript to run this app.
      </noscript>
      <div id="root"></div>
      <% for (let chunk in htmlWebpackPlugin.files.chunks) { %>
      <script type="text/javascript" src="<%=htmlWebpackPlugin.files.chunks[chunk].entry %>"></script>
      <% } %>
  </body>
  </html>
  

• ./src/index.tsx

  import React from 'react'
  import ReactDOM from 'react-dom'
  
  ReactDOM.render(
      <div>Hello React+typeScript</div>,
      document.getElementById('root'),
  )
  

6. package 启动脚本

{
  ...,
  "scripts": {
    "start": "webpack-dev-server --config ./build/webpack.dev.conf.js",
    "build": "webpack --config ./build/webpack.prod.conf.js"
  },
  ...
}

参考