Vue开启Gzip打包异常：webpack打包报错Cannot read property ‘emit‘ of undefined

Vue开启Gzip打包异常：webpack打包报错Cannot read property 'emit' of undefined

 

相关代码

const CompressionPlugin = require('compression-webpack-plugin')

webpackConfig.plugins.push(

var path = require('path')
var utils = require('./utils')
var webpack = require('webpack')
var config = require('../config')
var merge = require('webpack-merge')
var baseWebpackConfig = require('./webpack.base.conf')
var CopyWebpackPlugin = require('copy-webpack-plugin')
var HtmlWebpackPlugin = require('html-webpack-plugin')
var ExtractTextPlugin = require('extract-text-webpack-plugin')
var OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
var CompressionWebpackPlugin = require('compression-webpack-plugin');

var env = config.build.env;
var productionGzipExtensions = [
    'js',
    'css',
    'html',
    'svg',
    'png',
    'less',
    'jpg',
    'jpeg',
    'woff',
    'ttf',
    'woff2',
    'ico',
];

var webpackConfig = merge(baseWebpackConfig, {
    module: {
        rules: utils.styleLoaders({
            sourceMap: config.build.productionSourceMap,
            extract: true
        })
    },
    devtool: config.build.productionSourceMap ? '#source-map' : false,
    output: {
        path: config.build.assetsRoot,
        filename: utils.assetsPath('js/[name].[chunkhash].js'),
        chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
    },
    plugins: [
        // http://vuejs.github.io/vue-loader/en/workflow/production.html
        new webpack.DefinePlugin({
            'process.env': env
        }),
        // new CompressionWebpackPlugin({
        //     algorithm: 'gzip',
        //     test: productionGzipExtensions,
        //     threshold: 0,
        //     minRatio: 0.8,
        // }),
        new webpack.optimize.UglifyJsPlugin({
            compress: {
                warnings: false
            },
            sourceMap: false
        }),
        // extract css into its own file
        new ExtractTextPlugin({
            filename: utils.assetsPath('css/[name].[contenthash].css')
        }),
        // Compress extracted CSS. We are using this plugin so that possible
        // duplicated CSS from different components can be deduped.
        new OptimizeCSSPlugin({
            cssProcessorOptions: {
                safe: true
            }
        }),
        // generate dist index.html with correct asset hash for caching.
        // you can customize output by editing /index.html
        // see https://github.com/ampedandwired/html-webpack-plugin
        new HtmlWebpackPlugin({
            filename: config.build.index,
            template: 'index.html',
            inject: true,
            minify: {
                removeComments: true,
                collapseWhitespace: true,
                removeAttributeQuotes: true
                    // more options:
                    // https://github.com/kangax/html-minifier#options-quick-reference
            },
            // necessary to consistently work with multiple chunks via CommonsChunkPlugin
            chunksSortMode: 'dependency'
        }),
        // keep module.id stable when vender modules does not change
        new webpack.HashedModuleIdsPlugin(),
        // split vendor js into its own file
        new webpack.optimize.CommonsChunkPlugin({
            name: 'vendor',
            minChunks: function(module, count) {
                // any required modules inside node_modules are extracted to vendor
                return (
                    module.resource &&
                    /\.js$/.test(module.resource) &&
                    module.resource.indexOf(
                        path.join(__dirname, '../node_modules')
                    ) === 0
                )
            }
        }),
        // extract webpack runtime and module manifest to its own file in order to
        // prevent vendor hash from being updated whenever app bundle is updated
        new webpack.optimize.CommonsChunkPlugin({
            name: 'manifest',
            chunks: ['vendor']
        }),
        // copy custom static assets
        new CopyWebpackPlugin([{
            from: path.resolve(__dirname, '../static'),
            to: config.build.assetsSubDirectory,
            ignore: ['.*']
        }])
    ]
})

if (config.build.productionGzip) {
    var CompressionWebpackPlugin = require('compression-webpack-plugin')

    webpackConfig.plugins.push(
        new CompressionWebpackPlugin({
            algorithm: 'gzip',
            test: new RegExp(
                '\\.(' +
                config.build.productionGzipExtensions.join('|') +
                ')$'
            ),
            threshold: 1024,
            minRatio: 0.8
        })
    )
}

if (config.build.bundleAnalyzerReport) {
    var BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
    webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}

module.exports = webpackConfig

 

错误如下

compiler.hooks.emit.tapAsync({ name: 'CompressionPlugin' }, emit);

TypeError: Cannot read property 'emit' of undefined

at CompressionPlugin.apply (C:\MyWayProject\2018\vue\ehrAdmin\node_modules\compression-webpack-plugin\dist\index.js:175:20)

 

解决方案

把compression-webpack-plugin降到1.1.12即可

//卸载原高版本compression-webpack-plugin
npm uninstall --key compression-webpack-plugin
//新安装低版本compression-webpack-plugin
npm install --save-dev [email protected]

 

参考资料：https://segmentfault.com/q/1010000016321028