webpack学习（六）打包压缩js和css

//使用插件html-webpack-plugin打包合并html
//使用插件extract-text-webpack-plugin打包独立的css
//使用UglifyJsPlugin压缩代码
var HtmlWebpackPlugin = require('html-webpack-plugin');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var webpack = require("webpack");
module.exports = {
    entry: {
        bundle : './src/js/main.js'
    },
    output: {
        filename: "[name]-[hash].js",
        path: __dirname + '/dist'
    },
    module: {
        rules: [
            {
                test: /\.css$/,
                use: ExtractTextPlugin.extract({
                    fallback: "style-loader",
                    use: "css-loader"
                })

            },
            {
                test: /\.(png|jpg|jpeg|gif)$/,
                use: 'url-loader?limit=8192'
            }
        ]
    },
    resolve:{
            extensions:['.js','.css','.json']  //用于配置程序可以自行补全哪些文件后缀
    },

    plugins:[
        new HtmlWebpackPlugin({
            title: 'hello webpack',
            template:'src/component/index.html',
            inject:'body',
            minify:{ //压缩HTML文件
                 removeComments:true,    //移除HTML中的注释
                 collapseWhitespace:true    //删除空白符与换行符
             }
        }),
        new ExtractTextPlugin("[name].[hash].css"),
        new webpack.optimize.UglifyJsPlugin({
            compress: {     //压缩代码
                dead_code: true,    //移除没被引用的代码
                warnings: false,     //当删除没有用处的代码时，显示警告
                loops: true //当do、while 、 for循环的判断条件可以确定是，对其进行优化
            },
            except: ['$super', '$', 'exports', 'require']    //混淆,并排除关键字
        })
    ]
};