const webpack = require('webpack') const previewConfig = require('./webpack.dev') previewConfig.cache = { type: 'memory' } if (webpack.version.match(/^5\./)) { throw new Error("Measure plugins doesn't support webpack 5") } else { const Visualizer = require('webpack-visualizer-plugin') previewConfig.plugins.push(new Visualizer()) const SpeedMeasurePlugin = require('speed-measure-webpack-plugin') const smp = new SpeedMeasurePlugin() module.exports = smp.wrap(previewConfig) }