webpack+react 环境

0,  node+npm 

1，npm install webpack -g

2，npm install webpack-dev-server -g

3，npm install react react-dom --save

4，npm install jquery --save

5，npm install babel-core babel-loader babel-preset-es2015 babel-preset-react --save-dev   //es6

6，npm install url-loader file-loader --save-dev  //img

7，npm install css-loader style-loader --save-dev //css

 目录：

webpack.config.js：

var path = require('path');
module.exports = {
  entry: path.resolve(__dirname, 'src/app.js'),//源文件目录
  output: {
    path: path.resolve(__dirname, 'build'),//构建目录
    filename: 'bundle.js'
  }
}