webpack.config.js

const path = require('path')
const HTMLPlugin = require('html-webpack-plugin')
const webpack = require('webpack')
const ExtractPlugin = require('extract-text-webpack-plugin')

const isDev = process.env.NODE_ENV === 'development'
const config = {
    target: 'web', //跑在浏览器上，所以编译目标是web
    entry: path.join(__dirname, 'src/index.js'),
    output: {
        filename: 'bundle.[hash:8].js',
        path: path.join(__dirname, 'dist')
    },
    module: {
        rules: [{
                test: /\.vue$/,
                loader: 'vue-loader'
            }, {
                test: /\.jsx$/,
                loader: 'babel-loader'
            },
            {
                test: /\.(gif|jpg|jpeg|png|svg)$/,
                use: [{
                    loader: 'url-loader',
                    options: {
                        limit: 1024,
                        name: '[name]-aaa.[ext]'
                    }
                }]
            }
        ]
    },
    plugins: [
        //判断环境，vue框架一定要用
        new webpack.DefinePlugin({
            'process.env': {
                NODE_ENV: isDev ? '"development"' : '"production"'
            }
        }),
        new HTMLPlugin()
    ]
}

if (isDev) {
    config.module.rules.push({
        test: /\.styl/,
        use: [
            'style-loader',
            'css-loader',
            {
                loader: 'postcss-loader',
                options: {
                    sourceMap: true,
                }
            },
            'stylus-loader'
        ]
    })
    config.devtool = '#cheap-module-eval-source-map' //帮助我们调试代码
    //dev配置
    config.devServer = {
        port: 8000,
        host: '0.0.0.0',
        overlay: { //错误显示在网页上
            errors: true
        },
        hot: true //热更新，只重新渲染该页面的组件
    }
    config.plugins.push(
        new webpack.HotModuleReplacementPlugin(), //配合hot使用
        new webpack.NoEmitOnErrorsPlugin() //减少不需要的信息展示
    )

} else {
    config.entry = {
        app: path.join(__dirname, 'src/index.js'),
        vendor: ['vue']
    }
    config.output.filename = '[name].[chunkhash:8].js'
    config.module.rules.push({
        test: /\.styl/,
        use: ExtractPlugin.extract({
            fallback: 'style-loader',
            use: [
                'css-loader',
                {
                    loader: 'postcss-loader',
                    options: {
                        sourceMap: true,
                    }
                },
                'stylus-loader'
            ]
        })
    })
    config.plugins.push(
        new ExtractPlugin('styles.[contentHash:8].css'),
        //vendor一定要在runtime前面
        new webpack.optimize.CommonsChunkPlugin({
            name: 'vendor'
        }),
        new webpack.optimize.CommonsChunkPlugin({
            name: 'runtime'
        })
    )
}

module.exports = config