webpack.config.js

const path = require('path');
const htmlWebpackPlugin = require('html-webpack-plugin');
const cleanWebpackPlugin = require('clean-webpack-plugin');
const webpack = require('webpack');


module.exports = {
    devtool: 'inline-source-map',
    entry : {
        app : __dirname  + '/src/index.js',
        // print : __dirname  + '/src/print.js'
    },
    output :　{
        path : path.resolve(__dirname,'dist'),
        filename : '[name].build.js'
    },
    devServer : {
        contentBase : '/dist',
        port  : 9012,
        hot : true
    },
    plugins : [
        new htmlWebpackPlugin({
            title : 'htmlwebpack test'
        }),
        new cleanWebpackPlugin(
            ['dist'],
            {
                root : __dirname,
                verbose : true,
                dry : false,
                exclude : ['test']
            }
        ),
        new webpack.HotModuleReplacementPlugin(),
        // new webpack.optimize.UglifyJsPlugin({
        //     sourceMap: options.devtool && (options.devtool.indexOf("sourcemap") >= 0 || options.devtool.indexOf("source-map") >= 0)
        // })
    ],
    module : {
        rules : [
            {
                
                test: /\.css$/,
                use: [
                'style-loader',
                'css-loader'
                ]            
            },
            {
                test: /\.(png|svg|jpg|gif)$/,
                use: [
                'file-loader'
                ]
            }
        ]
    }
}