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React 项目迁移 Webpack Babel7的实现

时间:2021-07-01 10:21:17 帮助过:2人阅读

不久前写了一篇webpack 4 升级迁移 这里简单说下 React 项目的一些配置;

首先我们新建项目 react-web ,然后进入项目初始化 package.json ;

cd react-web && npm init

接下来我们安装 webpack ,这里需要注意一点,是命令行已经单独提取出来了,我们不仅需要安装 webpack 还需要安装 webpack-cli 。

npm i webpack webpack-cli --save-dev

接下来我们开始安装和 react 相关的依赖包;

npm i @babel/core babel-loader @babel/preset-env @babel/preset-react --save-dev

接下来我们初始化 babel 的配置文件。

touch .babelrc

然后把下面内容粘贴进去;

{
 "presets": ["@babel/preset-env", "@babel/preset-react"]
}

实际上 webpack 4 是可以支持无配置构建的,但是我们还是按照传统的方式写一下配置文件;我们新建 webpack.config.js

module.exports = { 
 module: {
 rules: [
  {
  test: /\.js$/,
  exclude: /node_modules/,
  use: {
   loader: "babel-loader"
  }
  }
 ]
 }
};

接下来我们开始 做点和 React 组件相关的东西;

npm i react-dom react prop-types --save-dev

我们在 src 下新建目录 components ;

我们建立一个 Header.js 和 Footer.js .

Footer.js

import React, { Component } from "react";

class Footer extends Component { 
 constructor() {
 super();
 this.state = {
  year: "2018"
 };
 }
 render() {
 return (
  <footer class="ft">
   copyright © {this.state.year}
  </footer>
 );
 }
}
export default Footer;

Header.js

import React, { Component } from "react"; 
import ReactDOM from "react-dom"; 
class Header extends Component { 
 constructor() {
 super();
 this.state = {
  year: "2018"
 };
 }
 render() {
 return (
  <header class="hd">
   <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Logo</a>
   <ul class="pull-right">
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Home</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Link1</a></li>
   <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >Link2</a></li>
   </ul>
  </header>
 );
 }
}
export default Header;

然后我们新增文件 src/index.js

import React, { Component } from "react"; 
import ReactDOM from "react-dom"; 
import Header from "../src/components/Header"; 
import Footer from "../src/components/Footer";

class ReactApp extends Component { 
 constructor() {
 super();
 }


 render() {
 return (
  <div class="main">
   <Header></Header>
   <Footer></Footer>
  </div>
 );
 }
}

ReactDOM.render(<ReactApp />, document.getElementById('react-app'));

export default ReactApp;

接下来我们需要预览页面,我们引入下 html-loader

npm i html-webpack-plugin html-loader --save-dev

修改我们的 webpack 配置:

const HtmlWebPackPlugin = require("html-webpack-plugin"); 
module.exports = { 
 module: {
 rules: [
  {
  test: /\.js$/,
  exclude: /node_modules/,
  use: {
   loader: "babel-loader"
  }
  },
  {
  test: /\.html$/,
  use: [
   {
   loader: "html-loader"
   }
  ]
  }
 ]
 },
 plugins: [
 new HtmlWebPackPlugin({
  template: "./src/index.html",
  filename: "./index.html"
 })
 ]
};

我们在 src 下新建 index.html 然后添加下面的内容:

<!DOCTYPE html> 
<html lang="en"> 
<head> 
 <meta charset="utf-8">
 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" rel="external nofollow" >
 <title>React & Webpack4</title>
</head> 
<body> 
 <div class="container">
  <div class="row mt-5">
   <div class="col-md-4 offset-md-1">
    <p>Create a new article</p>
    <div id="react-app">
    </div>
   </div>
  </div>
 </div>
</body> 
</html>

接下来我们安装 webpack-dev-server 在开发时用于起一个服务器预览;

npm i webpack-dev-server --save-dev

接下来修改 npm scripts:

"scripts": {
 "start": "webpack-dev-server --open --mode development",
 "build": "webpack"
}

差不多已经完成一部分了,后面你就可以再安装其他 react 套件了;

当然如果觉得麻烦你也可以使用 yarn-react-webpack-seed 。

扩展阅读

https://www.valentinog.com/blog/react-webpack-babel/
https://reacttraining.com/react-router/web/api/HashRouter
https://github.com/JackPu/yarn-react-webpack-seed

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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