react+webpack+redux+react-router环境搭建

第一步，新建一个文件夹，然后npm init -yes初始化，会生成一个package.json记录整个项目的依赖包信息

安装webpack cnpm i webpack webpack-dev-server --save-dev

新建以下目录文件，

安装react包 cnpm i react react-dom redux react-redux redux-thunk react-router --save-dev

index.html文件内容：

index.jsx文件内容，作为整个项目的主入口

import ReactDOM from 'react-dom';
import React, {Component} from 'react';
 
class App extends Component {
    render() {
        return 
Hello React !!!
    }
}

ReactDOM.render(
    ,
    document.getElementById("root")
)

接下来开始配置webpack.config.js:
webpack四大组成部分：entry,output,module,plugins

const srcDir = __dirname + "/src";
const distDir = __dirname + "/dist";

module.exports = {
    entry: [
        srcDir + "/index.jsx" //入口
    ],
    output: {
        path: distDir,//打包后的文件存放地方，会自动新建
        filename: 'index.[hash:7].js'//打包后输出的文件名，后面跟7位随机hash值
    },
    devtool: 'source-map',
    devServer: {
        contentBase: './public',//本地服务器所加载的页面的目录
        historyApiFallback: true,//不跳转
        inline: true,//实时刷新
        port: 8090, //端口号
        hot: true
    },
    module:{},
    plugins:[]

再安装解析jsx的loader及插件去解析jsx和es6语法：cnpm i babel-cli babel-loader babel-preset-env babel-preset-react babel-plugin-react-transform react-transform-hmr --save-dev

module: {
        rules: [
            {
                test: /(\.jsx|\.js)$/,
                use: {
                    loader: "babel-loader",
                    options: {
                        presets: [
                            'env', 'react'
                        ]
                    }
                },
                exclude: /node_modules/
            },



  //.babelrc
    {
      "presets": [
        "react",
        "env"
      ],
      "env": {
        "development": {
          "plugins": [
            [
              "react-transform",
              {
                "transforms": [
                  {
                    "transform": "react-transform-hmr",
                    "imports": [
                      "react"
                    ],
                    "locals": [
                      "module"
                    ]
                  }
                ]
              }
            ]
          ]
        }
      }
    }

cnpm i html-webpack-plugin --save-dev

const HtmlWebpackPlugin = require("html-webpack-plugin");//生成新的html文件

plugins: [
        
        new HtmlWebpackPlugin({//根据模板引入css,js最终生成的html文件
            filename: 'index.html',//生成文件存放路径
            template: './public/index.html',//html模板路径
        }),

cnpm i extract-text-webpack-plugin clean-webpack-plugin --save-dev

const ExtractTextPlugin = require('extract-text-webpack-plugin');//分离css和js
const CleanWebpackPlugin = require('clean-webpack-plugin');//清缓存


new ExtractTextPlugin('style.css'),//独立导出css
    new CleanWebpackPlugin('dist/*.*', {
        root: __dirname,
        verbose: true,
        dry: false
    })

cnpm i style-loader css-loader postcss-loader autoprefixer --save-dev

            {
                test: /\.css$/,
                use: [
                    {
                        loader: "style-loader" //在html中插入