[JavaScript知识库]使用 webapck 搭建 React 基础开发环境

项目结构

需要用的 库
react, react-dom， webpack , webpack-cli, webpack-dev-server

插件和 loader：
@babel/core, @babel/preset-env ,@babel/preset-react ,babel-loader, html-webpack-plugin

基础配置

webpack.config.js

const path = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin')

module.exports = {
  mode: 'development',
  devtool: 'none',
  entry: './src/index.js',
  output: {
    filename: 'main.js',
    path: path.resolve('dist')
  },
  devServer: {
    port: 3000,
    hot: true
  },
  module: {
    rules: [
      {
        test: /\.js|jsx$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
            options: {
              presets: ['@babel/preset-env', '@babel/preset-react']
            }
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/index.html'
    })
  ]
}

package.json

{
  "name": "reactProject",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.13.8",
    "@babel/preset-env": "^7.13.9",
    "@babel/preset-react": "^7.12.13",
    "babel-loader": "^8.2.2",
    "html-webpack-plugin": "^4.5.2",
    "react": "^17.0.1",
    "react-dom": "^17.0.1",
    "webpack": "^4.46.0",
    "webpack-cli": "^3.3.12",
    "webpack-dev-server": "^3.11.2"
  }
}

// src/index.js
import React from 'react'
import { render } from 'react-dom'

// 自定义组件
function App() {
  return <div>React</div>
}

render(<App />, document.getElementById('root'))

安装 执行

npm install

运行 devServer

npx webpack-dev-server