React&Webpack 环境安装

时间:2022-10-26 05:10:29

react的安装依赖nodejs,nodejs安装下载可从http://nodejs.org/en/下载

1.   环境安装

1.1      创建lib目录

cd E:\ReactLib

1.2      安装全局webpack包

npm install webpack -g

1.3      新建一个package.json依赖管理文件

npm init

1.4      安装webpack依赖包

npm install webpack --save-dev

2.   webpack 基本入门

webpack主要结构分三个:入口文件配置(entry)、入口文件输出配置(output)、加载器配置(module)、其他配置(resolve)

2.1      入口文件配置

entry: {

index : './src/main.js'

},

2.2      入口文件输出配置

//配置编译成功后文件存放的位置

output: {

path: 'dist/js',  //编译后文件所在的文件夹

filename: '[name].js'  //根据入口文件名命名编译后的文件名,编译后文件还是叫main.js

},

2.3      加载器配置

module: {

//最关键的一块配置,它告知 webpack 每一种文件都需要使用什么加载器来处理

loaders: [

{ test: /\.css$/, loader: 'style-loader!css-loader' },

{ test: /\.js$/, loader: 'jsx-loader?harmony' },

{ test: /\.scss$/, loader: 'style!css!sass?sourceMap'},

{ test: /\.(png|jpg)$/, loader: 'url-loader?limit=8192'}

]

},

2.4      其他配置

resolve: {

//自动扩展文件后缀名,意味着我们require模块可以省略不写后缀名

extensions: ['', '.js', '.json', '.scss']

},

2.5      先参考例子中的目录结构

React&Webpack 环境安装

build存放编译后的文件,src存放react代码的文件夹,components存放react组件的文件夹,node_modules存放安装的依赖

3.   react安装:

npm install --save-dev react react-dom

npm install --save-dev babel-core babel-loader  babel-preset-es2015 babel-preset-react

npm install --save-dev style-loader css-loader sass-loader url-loader

npm install --save-dev webpack-dev-server

//自动刷新修改后的结果,在webpack.config.js中配置webpack-dev-server,

//在这里需要修改下entry的路径,给它加一个webpack/hot/dev-server,后文会提到

4.   文件内容

4.1      package.json配置

{

"name": "redux",

"version": "1.0.0",

"description": "",

"main": "index.js",

"dependencies": {

"react": "^15.6.1",

"react-dom": "^15.6.1"

},

"scripts": {

"build": "webpack",

"start": "webpack-dev-server --devtool eval --progress --colors --content-base build"

},

"author": "",

"license": "ISC",

"devDependencies": {

"babel-core": "^6.26.0",

"babel-loader": "^7.1.2",

"babel-preset-es2015": "^6.24.1",

"babel-preset-react": "^6.24.1",

"css-loader": "^0.28.5",

"sass-loader": "^6.0.6",

"style-loader": "^0.18.2",

"url-loader": "^0.5.9",

"webpack": "^3.5.5",

"webpack-dev-server": "^2.7.1"

}

}

4.2      webpack.config.js文件的配置如下:

var path = require('path');

var webpack = require('webpack');

module.exports = {

entry: ['webpack/hot/dev-server', path.resolve(__dirname, './src/main.js')],

output: {

path: path.resolve(__dirname, './build'),

filename: 'bundle.js',

},

module: {

loaders: [{

test: /\.jsx?$/,

exclude: /node_modules/,

loader: 'babel-loader',

query:

{

presets: ['react']

}

}]

},

plugins: [new webpack.HotModuleReplacementPlugin()]

};

4.3      main.js内容如下:

let React = require('react');

let ReactDOM = require('react-dom');

let AppComponent = require('./components/index.js');

ReactDOM.render(<AppComponent />, document.getElementById('content'));

4.4      index.js内容如下:

var React = require('react');

var ProductBox = React.createClass({

render: function () {

return (

<div className="productBox">

Hello World!

</div>

);

}

});

module.exports = ProductBox;

4.5      index.html内容如下:

<!DOCTYPE html>

<html>

<head lang="en">

<meta charset="UTF-8">

<title>React Test</title>

</head>

<body>

<div id="content"></div>

<script src="http://localhost:8080/webpack-dev-server.js"></script>

<script src="./bundle.js"></script>

</body>

</html>

5.   编译与启动

将上面的文件写好后并放到对应文件夹内运行命令npm run build,执行npm run start运行服务,成功后浏览器访问地址location:8080

注:node_modules可以从E:\ReactLib获取,代码工程可以随便放入到任何目录,react安装依赖nodejs,需先保证nodejs安装成功。