一、配置webpack
1、基本安装
首先我们创建一个目录webpack-react，初始化 npm，然后在本地安装 webpack，接着安装 webpack-cli（此工具用于在命令行中运行 webpack）：
mkdir webpack-react && cd webpack-react
npm init -y
npm install webpack webpack-cli --save-dev
2.更新 package.json 文件：
{
"name": "webpack-react",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"build": "webpack --config webpack.config.js"
},
"devDependencies": {
"webpack": "^5.3.2",
"webpack-cli": "^4.1.0"
}
}
注：这里package.json文件我只列举了重要信息。
3、现在我们将在项目根目录创建以下目录结构、文件和内容：
- src目录结构：
-
项目根目录下创建index.html文件
React、webpack5 and Babel7
二、配置React和Babel
1、安装react和react-dom作为依赖：
npm install --save react react-dom
2、安装 babel7相关模块
npm install --save-dev babel-loader @babel/preset-react @babel/preset-env @babel/core
-
babel-loader：使用 Babel 转换 JavaScript依赖关系的 Webpack 加载器
-
@babel/preset-react：即 babel-preset-react，针对所有 React 插件的 Babel 预设，例如将 JSX 转换为函数
-
@babel/preset-env：根据您要支持的浏览器，决定使用哪些 transformations / plugins 和 polyfills，例如为旧浏览器提供现代浏览器的新特性
-
@babel/core：即 babel-core，将 ES6 代码转换为 ES5
3、创建 webpack.config.js 和 .babelrc 文件，并配置 babel-loader 及 babel 选项
-
创建webpack.config.js文件，并按如下配置：
const path = require('path'); module.exports = { entry: './src/index.js', output: { filename: 'bundle.js', path: path.resolve(__dirname,'dist') }, module:{ rules: [ { test: /.jsx?$/, use: ['babel-loader'], exclude: /node_modules/ } ] } };
-
创建.babelrc文件并添加配置信息：
{ "presets": [ [ "@babel/preset-env", { "targets": { // 大于相关浏览器版本无需用到 preset-env "edge": 17, "firefox": 60, "chrome": 67, "safari": 11.1 }, // 根据代码逻辑中用到的 ES6+语法进行方法的导入，而不是全部导入 "useBuiltIns": "usage" } ], "@babel/preset-react" ], "plugins": [ "@babel/plugin-proposal-class-properties" ] }
4、在src目录下创建index.js文件渲染组件
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
ReactDOM.render(
<React.StrictMode>
<App />
</React.StrictMode>,
document.getElementById('root')
);
5、安装 html-webpack-plugin和clean-webpack-plugin 作为 dev 依赖项：
npm install --save-dev html-webpack-plugin clean-webpack-plugin
并配置webpack.config.js文件：
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
module.exports = {
module:{
rules: [
{
test: /\.jsx?$/,
use: ['babel-loader'],
exclude: /node_modules/
}
]
},
plugins: [
new CleanWebpackPlugin(),
new HtmlWebpackPlugin({
title: 'React,webpack5 and Babel7',
template: 'index.html',
filename: 'index.html'
})
]
};
运行npm run build生成dist目录：
三、配置webpack-dev-server
1、安装项目
npm install --save-dev webpack-dev-server
2、更新package.json文件
{
"name": "webpack-react",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "webpack serve --env mode",
"build": "webpack --config webpack.config.js",
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC",
"devDependencies": {
"@babel/core": "^7.12.3",
"@babel/preset-env": "^7.12.1",
"@babel/preset-react": "^7.12.1",
"babel-loader": "^8.1.0",
"clean-webpack-plugin": "^3.0.0",
"html-webpack-plugin": "^4.5.0",
"webpack": "^5.3.2",
"webpack-cli": "^4.1.0",
"webpack-dev-server": "^3.11.0"
},
"dependencies": {
"classnames": "^2.2.6",
"react": "^17.0.1",
"react-dom": "^17.0.1"
}
}
3、执行npm run start,在浏览器打开localhost:8080页面
四、配置CSS、图片
1、安装
npm install --save-dev css-loader style-loader
2、配置webpack.config.js
const path = require('path');
module.exports = {
module:{
rules: [
{
test: /\.jsx?$/,
use: ['babel-loader'],
exclude: /node_modules/
},
{
test: /\.css$/,
use: ['style-loader','css-loader']
},
{
test: /\.(png|svg|jpg|gif)$/,
use: [
'file-loader'
]
}
]
}
};
以上就完成配置react应用程序，完整源码参看我的github，若有帮助，赏个star😀
