手动搭建一个webpack+react笔记

{
  "name": "lottery",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "",
    "dev": "node ./build/dev.server.js",
    "build": "rimraf ./dist && webpack --config ./config/pro.config.js -p",
    "mock": "cross-env NODE_ENV=mock node ./build/dev.server.js"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "history": "^4.6.1",
    "mobx": "^3.2.2",
    "mobx-react": "^4.2.2",
    "prop-types": "^15.5.8",
    "react": "^15.5.4",
    "react-dom": "^15.5.4",
    "react-redux": "4.4.8",
    "react-router": "^4.1.1",
    "react-router-dom": "^4.1.1",
    "react-router-redux": "^5.0.0-alpha.6",
    "react-transition-group": "^1.1.3",
    "redux": "^3.6.0",
    "whatwg-fetch": "^2.0.3"
  },
  "devDependencies": {
    "autoprefixer": "^6.7.7",
    "babel-core": "^6.24.1",
    "babel-eslint": "^7.2.2",
    "babel-loader": "^6.4.1",
    "babel-plugin-react-transform": "^2.0.2",
    "babel-plugin-transform-decorators-legacy": "^1.3.4",
    "babel-plugin-transform-runtime": "^6.23.0",
    "babel-polyfill": "^6.23.0",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "babel-preset-react-hmre": "^1.1.1",
    "babel-preset-stage-0": "^6.24.1",
    "bundle-loader": "^0.5.5",
    "copy-webpack-plugin": "^4.0.1",
    "cross-env": "^5.0.0",
    "css-loader": "^0.28.0",
    "eslint": "^3.19.0",
    "eslint-config-standard": "^10.2.1",
    "eslint-friendly-formatter": "^2.0.7",
    "eslint-loader": "^1.7.1",
    "eslint-plugin-html": "^2.0.1",
    "eslint-plugin-import": "^2.2.0",
    "eslint-plugin-node": "^4.2.2",
    "eslint-plugin-promise": "^3.5.0",
    "eslint-plugin-react": "^6.10.3",
    "eslint-plugin-standard": "^3.0.1",
    "express": "^4.15.2",
    "extract-text-webpack-plugin": "^2.1.0",
    "file-loader": "^0.11.2",
    "html-webpack-plugin": "^2.28.0",
    "http-proxy-middleware": "^0.17.4",
    "less": "^2.7.2",
    "less-loader": "^4.0.3",
    "mockjs": "^1.0.1-beta3",
    "node-sass": "^4.5.2",
    "open": "0.0.5",
    "postcss-loader": "^1.3.3",
    "rimraf": "^2.6.1",
    "sass-loader": "^6.0.3",
    "style-loader": "^0.16.1",
    "url-loader": "^0.5.8",
    "webpack": "^2.4.1",
    "webpack-dev-middleware": "^1.10.1",
    "webpack-hot-middleware": "^2.18.0",
    "webpack-merge": "^4.1.0"
  }
}

首先这是需要安装的包

然后看dev.server里的代码

const express = require("express")
const webpackDevMiddleware = require("webpack-dev-middleware")
const webpack = require("webpack")
let webpackConfig = require("../config/dev.config")
const path = require('path')
let config = require('../config')
const app = express()
const open = require('open')
process.env.NODE_ENV === 'mock' && require('../mock/data')(app)
require('../config/proxy')(app) // 代理
let compiler = webpack(webpackConfig)
app.use(require("webpack-hot-middleware")(compiler));//固定写法
app.use(path.posix.join(config.dev.assetsPublicPath, config.dev.assetsSubDirectory), express.static('./static')) // 当所有/static这个下的请求
都转到static目录
app.use(webpackDevMiddleware(compiler, {
  publicPath: config.dev.assetsPublicPath
}))
app.listen(config.dev.port, function (res) {
  console.log(`Listening on port ${config.dev.port}!`)
  process.env.NODE_ENV !== 'mock' && open(`http://localhost:${config.dev.port}/#/index`)
})

之所以叫简版，是因为去除了一些花哨或者用处不大的东西，比如运行命令行的颜色，以及进度百分比等等

首先要搭建，必然需要一个服务器，这里为什么不选自带的webpack-dev-server，因为webpack-dev-server定制性差，比如我要改个端口，要在script里面改不能变量，

所以这里选择express做服务器，

webpack-dev-middleware是webpack为expres服务器提供的中间件，再说白了，就是让express的服务器支持热更新和缓存的(配合webpack-hot-middleware)
然后是proxy里的代码

const proxy = require('http-proxy-middleware')
const preA = require('./http_prefix').preA
const tables = [{
  proxy: preA,
  target: ''
}]
module.exports = (app) => {
  for (let i = 0; i < tables.length; i ++) {
    app.use(tables[i].proxy, proxy({
      target: tables[i].target,
      changeOrigin: true
    }))
  }
}
// 遍历代理的接口　　

然后我们看下config下面的index.js文件是什么以及dev.config文件是什么

const path = require('path')
const webpack = require('webpack')
const merge = require('webpack-merge')
const base = require('./base.config')
const HtmlWebpackPlugin = require('html-webpack-plugin')
module.exports = merge({
  entry: ['webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000','babel-polyfill','./src/main.js'], //需要热更新的配置
  output: {
    path: '/',这个这里作用不大build时候作用对应文件位置
    filename: '[name].js'
  },
  module: {
    rules: [
      {
        test: /\.less$/,
        loaders: ['style-loader','css-loader?modules&localIdentName=[local]-[hash:base64:5]', 'less-loader', 'postcss-loader']
      },
      {
        test: /\.scss$/,
        loaders: ['style-loader','css-loader', 'sass-loader', 'postcss-loader']
      },
    ]
  },
  plugins: [
    new webpack.LoaderOptionsPlugin({
      options: {
        eslint: {
          formatter: require('eslint-friendly-formatter')
        }
      }
    }),
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'index.html',
      inject: true // 打包好的js文件是插入到body还是body尾部
    })
  ],
  devtool: 'eval-source-map',
}, base)

　

const path = require('path')
module.exports = {
  build: {
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    assetsRoot: path.resolve(__dirname, '../dist')
  },
  dev : {
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    port: 3020,
  }
}
就是一些当本地运行或者生产时候对应的配置