webpack实现热更新（实施同步刷新）

npm install webpack -g 

npm init

npm init -yes //可以创建默认的package.json 

npm install webpack --save-dev 

npm install path fs html-webpack-plugin extract-text-webpack-plugin autoprefixer webpack-dev-server --save-dev

npm install css-loader style-loader --save-dev//样式文件，我们需要两种loader，css-loader 和 style－loader，css-loader会遍历css文件，找到所有的url(...)并且处理。style-loader会把所有的样式插入到你页面的一个style tag中。

webpack --config XXX.js //使用另一份配置文件（比如webpack.config2.js）来打包

webpack --watch //监听变动并自动打包

webpack -p//压缩混淆脚本，这个非常非常重要！

webpack -d//生成map映射文件，告知哪些模块被最终打包到哪里了

//安装转码规则 
npm install babel-core babel-loader babel-preset-es2015 babel-preset-React babel-preset-stage-0 –save-dev

npm install react react-dom react-router react-hot-loader css-loader jsx-loader --save-dev 

//react-hot-loader 是一款非常好用的 React 热插拔的加载插件，通过它可以实现修改-运行同步的效果，配合 webpack-dev-server 使用更佳！

$ npm i style-loader -D
$ npm i css-loader -D

 "scripts": {
  "start": "node dev-serve.js"
 },

{
 "name": "yubai",
 "description": "Utility components for react js",
 "version": "1.1.1",
 "keywords": [
  "react-component",
  "react-utils",
  "react utility"
 ],
 "scripts": {
  "start": "node dev-serve.js"
 },
 "src": "src",
 "test": "test",
 "dist": "dist",
 "mainInput": "ReactUtils",
 "mainOutput": "main",
 "dependencies": {
  "async": "^0.9.0",
  "backbone": "^1.1.2",
  "bootstrap": "^3.2.0",
  "es6-promise": "^1.0.0",
  "flux": "^2.0.1",
  "font-awesome": "^4.2.0",
  "humps": "0.0.1",
  "jquery": "^2.1.1",
  "jquery.ui.widget": "^1.10.3",
  "json5": "^0.2.0",
  "less": "^1.7.5",
  "less-loader": "^0.7.7",
  "lodash": "^2.4.1",
  "moment": "^2.8.3",
  "normalizr": "^0.1.2",
  "q": "^1.0.1",
  "react-hot-loader": "^0.4.5",
  "rimraf": "^2.2.8",
  "routes": "^1.2.0",
  "superagent": "^0.18.2",
  "codemirror": "3.20.0"
 },
 "repository": {
  "type": "git",
  "url": "git+ssh://git@github.com/sahusoftcom/react-utils.git"
 },
 "devDependencies": {
  "autoprefixer": "^6.6.1",
  "babel-core": "^6.21.0",
  "babel-loader": "^6.2.10",
  "babel-preset-es2015": "^6.18.0",
  "babel-preset-react": "^6.16.0",
  "css-loader": "^0.6.12",
  "extract-text-webpack-plugin": "^1.0.1",
  "fs": "0.0.1-security",
  "gulp": "^3.8.8",
  "gulp-concat": "^2.4.0",
  "gulp-jshint": "^1.8.4",
  "gulp-rename": "^1.2.0",
  "gulp-sass": "^0.7.3",
  "gulp-uglify": "^1.0.1",
  "gulp-util": "^3.0.1",
  "html-webpack-plugin": "^2.26.0",
  "jshint-loader": "~0.6.0",
  "jsx-loader": "^0.11.2",
  "karma": "~0.10.9",
  "karma-chrome-launcher": "~0.1.2",
  "karma-firefox-launcher": "~0.1.3",
  "karma-jasmine": "~0.1.5",
  "karma-phantomjs-launcher": "~0.1.1",
  "karma-script-launcher": "~0.1.0",
  "karma-webpack-plugin": "~1.0.0",
  "path": "^0.12.7",
  "postcss-loader": "^1.2.1",
  "react": "^15.4.2",
  "react-dom": "^15.4.2",
  "react-hot-loader": "^0.4.5",
  "react-router": "^3.0.0",
  "style-loader": "^0.6.5",
  "url-loader": "~0.5.4",
  "webpack": "^1.14.0",
  "webpack-dev-server": "^1.16.2"
 },
 "bugs": {
  "url": "https://github.com/sahusoftcom/react-utils/issues"
 },
 "homepage": "https://github.com/sahusoftcom/react-utils#readme",
 "main": "app.js",
 "author": "yubai",
 "license": "ISC"
}

var webpack = require('webpack'),
  path = require('path'),
  fs = require('fs'),
  HtmlWebpackPlugin = require('html-webpack-plugin'),
  ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
  entry: {
    app: ["./app.js"]
  },
  output: { //输出目录
    path: __dirname + './__build__',
    publicPath: "",
    filename: 'shared.js',
    chunkFilename: '[name].[chunkhash:3].min.js',
  },
  module: { //在配置文件里添加JSON loader
    loaders: [{
      test: /\.js$/,
      exclude: /^node_modules$/,
      loader: 'babel'
    }, {
      test: /\.css$/,
      exclude: /^node_modules$/,
      loader: ExtractTextPlugin.extract('style', ['css', 'autoprefixer'])
    }, {
      test: /\.less$/,
      exclude: /^node_modules$/,
      loader: ExtractTextPlugin.extract('style', ['css', 'autoprefixer', 'less'])
    }, {
      test: /\.scss$/,
      exclude: /^node_modules$/,
      loader: ExtractTextPlugin.extract('style', ['css', 'autoprefixer', 'sass'])
    }, {
      test: /\.(eot|woff|svg|ttf|woff2|gif|appcache)(\?|$)/,
      exclude: /^node_modules$/,
      loader: 'file-loader?name=[name].[ext]'
    }, {
      test: /\.(png|jpg|gif)$/,
      exclude: /^node_modules$/,
      loader: 'url-loader?limit=8192&name=images/[hash:8].[name].[ext]'
        //注意后面那个limit的参数，当你图片大小小于这个限制的时候，会自动启用base64编码图
    }, {
      test: /\.jsx$/,
      exclude: /^node_modules$/,
      loaders: ['jsx', 'babel']
    }]
  },
  resolve: {
    extensions: ['', '.js', '.json']
  },
  postcss: [
    require('autoprefixer') //调用autoprefixer插件,加入各个浏览器的前缀
  ],
  plugins: [
    new HtmlWebpackPlugin({
      template: './index.html'
    }),
    new ExtractTextPlugin('[name]-[hash:3].css'), //css随机数
    new webpack.HotModuleReplacementPlugin(), //热加载插件
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': '"development"'
    }),
    new webpack.NoErrorsPlugin()
  ]
};

var config = require("./webpack.config.js");
var webpack = require('webpack');
var WebpackDevServer = require('webpack-dev-server');

config.entry.app.unshift("webpack-dev-server/client?http://localhost:8099/");

var compiler = webpack(config);
var server = new WebpackDevServer(compiler, {
  publicPath: config.output.publicPath,
  stats: {
    colors: true
  }
});
server.listen(8099);

import React from 'react'
import { render } from 'react-dom'
import { Router, Route, IndexRoute, Link, IndexLink, hashHistory } from 'react-router'

alert("AAA");

npm install webpack -g 

//-g的意思是安装全局的webpack,但是我们实际的开发中还需要针对单个的项目进行webpack安装,执行命令:

npm install webpack --save-dev 

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

"scripts": { 
  "build": "webpack", 
  "dev": "webpack-dev-server --devtool eval --progress --colors --content-base build" 
} 

{
 "name": "yubai8",
 "version": "1.1.1",
 "main": "index.js",
 "dependencies": {},
 "devDependencies": {
  "html-webpack-plugin": "^2.26.0",
  "webpack-dev-server": "^1.16.2"
 },
 "scripts": {
  "build": "webpack",
  "dev": "webpack-dev-server --devtool eval --progress --colors --content-base build"
 },
 "author": "",
 "license": "ISC",
 "keywords": [],
 "description": ""
}

var path = require('path'),
  webpack = require('webpack'),
  HtmlWebpackPlugin = require('html-webpack-plugin');
module.exports = {
  entry: ['webpack/hot/dev-server', path.resolve(__dirname, './app.js')],
  output: {
    path: path.resolve(__dirname, './__build__'),
    filename: 'bundle.js'
  },
  devServer: {
    inline: true,
    port: 8099
  },
  module: {
    loaders: [{
      test: /\.js?$/,
      exclude: /(node_modules|bower_components)/,
      loader: 'babel',
      query: {
        presets: ['es2015', 'react']
      }

    }]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './index.html'
    }),
    new webpack.HotModuleReplacementPlugin()
  ]
};

npm run build     线上目录

npm run dev      开发目录