随着项目的页面越来越多体积越来越大，dev构建速度和pro打包速度越来越慢，然后就抽时间对项目进行了webpack升级来提升一下速度
升级过程中遇到了很多的坑，基本都是plugin和loader升级后的一些用法问题，花了一个晚上和一个上午时间，过程很痛苦，但是看到
速度的大幅度提示，还是很开心的
先上图看一下对比效果
webpack3 dev构建
webpack3 pro打包
webpack5 dev构建 提升60%
webpack5 pro 构建 提升61%
看的处理效果还是很不错的
1.首先是对webpack进行升级，升级后的版本如图
升级后一些用法发生了改变
webpack-merge的变化
dev启动命令变化
2.由于wepback的升级造成了其他一些插件或者loader的不能正常使用，索性使用yarn upgrade-interactive --latest升级了所有的依赖包
3.升级后报错babel-core6.x的版本需要使用babel-loader7的版本然后重新安装yarn add -D babel-loader@7
4.安装mini-css-extract-plugin替换extract-text-webpack-plugin
webpack.base.config.js
'use strict'
const path = require('path')
const utils = require('./utils')
const config = require('../config')
const { VueLoaderPlugin } = require('vue-loader')
function resolve(dir) {
return path.join(__dirname, '..', dir)
}
module.exports = {
devtool:'eval-source-map',
context: path.resolve(__dirname, '../'),
entry: {
app: './src/main.js'
},
output: {
path: config.build.assetsRoot,
filename: '[name].js',
publicPath: process.env.NODE_ENV === 'production' ?
config.build.assetsPublicPath : config.dev.assetsPublicPath
},
resolve: {
extensions: ['.js', '.vue', '.json'],
alias: {
'vue$': 'vue/dist/vue.esm.js',
'@': resolve('src'),
}
},
module: {
rules: [{
test: /.vue$/,
use: {
loader: 'vue-loader'
}
},
{
test: /.js$/,
use: {
loader: 'babel-loader'
},
exclude: resolve('node_modules'),
include: resolve('src')
},
{
test: /.(png|jpe?g|gif|svg)(?.*)?$/,
type: 'asset',
parser: {
dataUrlCondition: {
maxSize: 10 * 1024 // 10kb
}
},
generator: {
filename: utils.assetsPath('img/[name].[hash:7].[ext]')
}
},
{
test: /.(mp4|webm|ogg|mp3|wav|flac|aac)(?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('media/[name].[hash:7].[ext]')
}
},
{
test: /.(woff2?|eot|ttf|otf)(?.*)?$/,
loader: 'url-loader',
options: {
limit: 10000,
name: utils.assetsPath('fonts/[name].[hash:7].[ext]'),
publicPath: '../../'
}
}]
},
node: {
global: false
},
plugins: [
new VueLoaderPlugin()
]
}
utils.js
'use strict'
const path = require('path')
const config = require('../config')
const MiniCssExtractPlugin = require("mini-css-extract-plugin")
const packageConfig = require('../package.json')
exports.assetsPath = function (_path) {
const assetsSubDirectory = process.env.NODE_ENV === 'production'
? config.build.assetsSubDirectory
: config.dev.assetsSubDirectory
return path.posix.join(assetsSubDirectory, _path)
}
exports.cssLoaders = function (options) {
options = options || {}
const cssLoader = {
loader: 'css-loader',
options: {
sourceMap: options.sourceMap
}
}
const postcssLoader = {
loader: 'postcss-loader',
options: {
sourceMap: options.sourceMap
}
}
// generate loader string to be used with extract text plugin
function generateLoaders(loader, loaderOptions) {
const loaders = options.usePostCSS ? [cssLoader, postcssLoader] : [cssLoader]
if (loader) {
loaders.push({
loader: loader + '-loader',
options: Object.assign({}, loaderOptions, {
sourceMap: options.sourceMap
})
})
}
// Extract CSS when that option is specified
// (which is the case during production build)
if (options.extract) {
return [
{
loader: MiniCssExtractPlugin.loader,
options: {
publicPath: '../../' //修改路径处理图片路径错误
}
}
].concat(loaders)
} else {
return [
{
loader: 'vue-style-loader'
}
].concat(loaders)
}
}
// https://vue-loader.vuejs.org/en/configurations/extract-css.html
return {
css: generateLoaders(),
postcss: generateLoaders(),
less: generateLoaders('less'),
// sass: generateLoaders('sass', { indentedSyntax: true }),
// scss: generateLoaders('sass'),
// stylus: generateLoaders('stylus'),
// styl: generateLoaders('stylus')
}
}
// Generate loaders for standalone style files (outside of .vue)
exports.styleLoaders = function (options) {
const output = []
const loaders = exports.cssLoaders(options)
for (const extension in loaders) {
const loader = loaders[extension]
output.push({
test: new RegExp('\.' + extension + '$'),
use: loader
})
}
return output
}
exports.createNotifierCallback = () => {
const notifier = require('node-notifier')
return (severity, errors) => {
if (severity !== 'error') return
const error = errors[0]
const filename = error.file && error.file.split('!').pop()
notifier.notify({
title: packageConfig.name,
message: severity + ': ' + error.name,
subtitle: filename || '',
icon: path.join(__dirname, 'logo.png')
})
}
}
webpack.dev.conf.js
'use strict'
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const { merge } = require('webpack-merge')
const path = require('path')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const FriendlyErrorsPlugin = require('friendly-errors-webpack-plugin')
const portfinder = require('portfinder')
const HOST = process.env.HOST
const PORT = process.env.PORT && Number(process.env.PORT)
const devWebpackConfig = merge(baseWebpackConfig, {
mode: 'development',
module: {
rules: utils.styleLoaders({ sourceMap: config.dev.cssSourceMap, usePostCSS: true })
},
// cheap-module-eval-source-map is faster for development
devtool: config.dev.devtool,
// these devServer options should be customized in /config/index.js
devServer: {
clientLogLevel: 'warning',
historyApiFallback: {
rewrites: [
{ from: /.*/, to: path.posix.join(config.dev.assetsPublicPath, 'index.html') },
],
},
hot: true,
contentBase: false, // since we use CopyWebpackPlugin.
compress: true,
host: HOST || config.dev.host,
port: PORT || config.dev.port,
open: config.dev.autoOpenBrowser,
overlay: config.dev.errorOverlay ? { warnings: false, errors: true } : false,
publicPath: config.dev.assetsPublicPath,
proxy: config.dev.proxyTable,
quiet: true, // necessary for FriendlyErrorsPlugin
watchOptions: {
poll: config.dev.poll,
}
},
plugins: [
new webpack.DefinePlugin({
'process.env': require('../config/dev.env'),
BASEURL: '"//test.com"',
}),
new webpack.HotModuleReplacementPlugin(),
// new webpack.NamedModulesPlugin(), // HMR shows correct file names in console on update.
// new webpack.NoEmitOnErrorsPlugin(),
// https://github.com/ampedandwired/html-webpack-plugin
new HtmlWebpackPlugin({
filename: 'index.html',
template: 'index.html',
inject: true,
chunkSortMode: 'auto'
}),
// copy custom static assets
new CopyWebpackPlugin({
patterns: [
{
from: path.resolve(__dirname, '../static'),
to: config.dev.assetsSubDirectory,
globOptions: {
dot: true,
gitignore: true,
ignore: ['.*'],
}
},
]
})
]
})
module.exports = new Promise((resolve, reject) => {
portfinder.basePort = process.env.PORT || config.dev.port
portfinder.getPort((err, port) => {
if (err) {
reject(err)
} else {
// publish the new Port, necessary for e2e tests
process.env.PORT = port
// add port to devServer config
devWebpackConfig.devServer.port = port
// Add FriendlyErrorsPlugin
devWebpackConfig.plugins.push(new FriendlyErrorsPlugin({
compilationSuccessInfo: {
messages: [`Your application is running here: http://${devWebpackConfig.devServer.host}:${port}`],
},
onErrors: config.dev.notifyOnErrors ?
utils.createNotifierCallback() : undefined
}))
resolve(devWebpackConfig)
}
})
})
webpack.prod.conf.js
'use strict'
const path = require('path')
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const { merge } = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const MiniCssExtractPlugin = require("mini-css-extract-plugin")
const TerserWebpackPlugin = require('terser-webpack-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const env = require('../config/prod.env')
let envOptions = {}
if (process.env.BUILD_ENV === "production") {
envOptions = {
'BASEURL': '"//test.com"',
}
} else {
envOptions = {
'BASEURL': '"//test.com"',
}
}
const webpackConfig = merge(baseWebpackConfig, {
mode: 'production',
module: {
rules: utils.styleLoaders({
sourceMap: config.build.productionSourceMap,
extract: true,
usePostCSS: true
})
},
devtool: config.build.productionSourceMap ? config.build.devtool : false,
output: {
path: config.build.assetsRoot,
filename: utils.assetsPath('js/[name].[hash:7].js'),
chunkFilename: utils.assetsPath('js/[name].[hash:7].js'),
clean: true
},
optimization: {
minimize: true,
minimizer: [
new TerserWebpackPlugin(),
new OptimizeCSSPlugin(),
],
runtimeChunk: { name: 'runtime' },
concatenateModules: true,
splitChunks: {
cacheGroups: {
vendor: {
test: /[\/]node_modules[\/]/,
name: 'vendor',
chunks: 'all',
priority: -10
},
'async-vendors': {
test: /[\/]node_modules[\/]/,
minChunks: 2,
chunks: 'async',
name: 'async-vendors'
}
},
},
moduleIds: 'deterministic'
},
plugins: [
// http://vuejs.github.io/vue-loader/en/workflow/production.html
new webpack.DefinePlugin({
'process.env': env,
...envOptions,
}),
new MiniCssExtractPlugin({
filename: utils.assetsPath('css/[name].[contenthash].css'),
chunkFilename: utils.assetsPath('css/[name].[contenthash].css')
}),
new HtmlWebpackPlugin({
filename: config.build.index,
template: 'index.html',
inject: true,
scriptLoading: 'blocking',
minify: {
removeComments: true,
collapseWhitespace: true,
removeAttributeQuotes: true
},
chunksSortMode: 'auto'
}),
new CopyWebpackPlugin({
patterns: [
{
from: path.resolve(__dirname, '../static'),
to: config.build.assetsSubDirectory,
globOptions: {
dot: true,
gitignore: true,
ignore: ['.*'],
}
},
]
})
]
})
if (config.build.productionGzip) {
const CompressionWebpackPlugin = require('compression-webpack-plugin');
webpackConfig.plugins.push(
new CompressionWebpackPlugin({
filename: '[path][base].gz[query]',
algorithm: 'gzip',
test: /.(js|css|json|txt|html|ico|svg)(?.*)?$/i,
threshold: 10240,
minRatio: 0.8,
deleteOriginalAssets: false//保留源文件
})
)
}
if (config.build.bundleAnalyzerReport) {
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}
module.exports = webpackConfig