vue.config.js

'use strict';
const path = require('path');

function resolve(dir) {
    return path.join(__dirname, dir)
}

// 导入compression-webpack-plugin
// eslint-disable-next-line no-undef
const CompressionWebpackPlugin = require('compression-webpack-plugin');
// 定义压缩文件类型
const productionGzipExtensions = ['js', 'css']
const name = 'GraphX';// page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following method:
// port = 9527 npm run dev OR npm run dev --port = 9527

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
    /**
     * You will need to set publicPath if you plan to deploy your site under a sub path,
     * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
     * then publicPath should be set to "/bar/".
     * In most cases please use '/' !!!
     * Detail: https://cli.vuejs.org/config/#publicpath
     */
    publicPath: process.env.NODE_ENV === 'development' ? '/' : './',
    outputDir: 'dist',
    assetsDir: 'static',
    lintOnSave: process.env.NODE_ENV === 'development',
    productionSourceMap: false,
    configureWebpack: {
        // provide the app's title in webpack's name field, so that
        // it can be accessed in index.html to inject the correct title.
        name: name,
        resolve: {
            alias: {
                '@': resolve('src')
            }
        },
        plugins: [
            new CompressionWebpackPlugin({
                filename: '[path][base].gz[query]',
                algorithm: 'gzip',
                test: new RegExp('\\.(' + productionGzipExtensions.join('|') + ')$'),
                threshold: 1024,
                minRatio: 0.8
            })
        ]
    },
    chainWebpack(config) {
        config.plugins.delete('preload'); // TODO: need test
        config.plugins.delete('prefetch'); // TODO: need test

        // set svg-sprite-loader
        config.module
            .rule('svg')
            .exclude.add(resolve('src/icons'))
            .end();

        config.module
            .rule('icons')
            .test(/\.svg$/)
            .include.add(resolve('src/icons'))
            .end()
            .use('svg-sprite-loader')
            .loader('svg-sprite-loader')
            .options({
                symbolId: 'icon-[name]'
            });

        // set preserveWhitespace
        config.module
            .rule('vue')
            .use('vue-loader')
            .loader('vue-loader')
            .tap(options => {
                options.compilerOptions.preserveWhitespace = true;
                return options
            })
            .end();

        config.when(process.env.NODE_ENV === 'development',
            config => config.devtool('cheap-source-map')
        );

        config.when(process.env.NODE_ENV !== 'development',
            config => {
                config
                    .plugin('ScriptExtHtmlWebpackPlugin')
                    .after('html')
                    .use('script-ext-html-webpack-plugin', [{
                        // `runtime` must same as runtimeChunk name. default is `runtime`
                        inline: /runtime\..*\.js$/
                    }])
                    .end();
                config
                    .optimization.splitChunks({
                    chunks: 'all',
                    cacheGroups: {
                        libs: {
                            name: 'chunk-libs',
                            test: /[\\/]node_modules[\\/]/,
                            priority: 10,
                            chunks: 'initial' // only package third parties that are initially dependent
                        },
                        elementUI: {
                            name: 'chunk-elementUI', // split elementUI into a single package
                            priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                            test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                        },
                        commons: {
                            name: 'chunk-commons',
                            test: resolve('src/lib'), // can customize your rules
                            minChunks: 3, //  minimum common number
                            priority: 5,
                            reuseExistingChunk: true
                        }
                    }
                });
                config.optimization.runtimeChunk('single')
            }
        )
    }
};