如何减少 WEBPACK + VUEJS 中的包大小 [英] How to reduce bundle size in WEBPACK + VUEJS
问题描述
我遵循了很多关于如何减小包大小的教程，但没有对包大小产生任何影响，我不知道为什么.
I followed a lot of tutorials on how to reduce the bundle size, but nothing took any effect on the bundle size and I don't know why.
每次我向 webpack 添加一些新代码时，我的包大小都保持不变.
Every time when I add some new code to webpack, my bundle size stays the same as before.
(我的应用是使用 vue cli 3 pwa 插件、webpack...等构建的)
(My app is built with vue cli 3 pwa plugin, webpack... and so on)
如果我运行 npm run build，我会得到这个输出:
If I run npm run build, I'm getting this output:
webpack.config.js:
const path = require('path');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const OfflinePlugin = require('offline-plugin');
const webpack = require('webpack');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const WebpackChunkHash = require('webpack-chunk-hash');
const CompressionPlugin = require('compression-webpack-plugin');
if (process.env.NODE_ENV === 'production') {
module.exports.plugins = (module.exports.plugins || []).concat([
// or use push because it's faster
new webpack.DefinePlugin({
'process.env': {
'process.env.NODE_ENV': '"production"',
},
}),
new webpack.optimize.UglifyJsPlugin({
mangle: true,
compress: {
warnings: false, // Suppress uglification warnings
pure_getters: true,
unsafe: true,
unsafe_comps: true,
screw_ie8: true,
},
output: {
comments: false,
},
exclude: [/\.min\.js$/gi], // skip pre-minified libs
}),
new webpack.HashedModuleIdsPlugin(),
new WebpackChunkHash(),
new CompressionPlugin({
asset: '[path].gz[query]',
algorithm: 'gzip',
test: /\.js$|\.css$|\.html$/,
threshold: 10240,
minRatio: 0,
}),
]);
}
const config = (module.exports = {
mode: 'production',
devtool: '', // Removed dev-tools mapping
entry: [
'./src/app.js',
{
vendor: ['offline-plugin/runtime'],
},
],
output: {
filename: '[name].bundle.js',
path: path.resolve(__dirname, 'build/client'),
publicPath: 'build/client',
},
resolve: {
extensions: ['.js', '.vue', '.json'],
alias: {
vue$: 'vue/dist/vue.esm.js', // Use the full build
},
},
module: {
rules: [
{
test: /\.vue$/,
use: 'vue-loader',
},
{
test: /\.css$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
options: {
// you can specify a publicPath here
// by default it use publicPath in webpackOptions.output
publicPath: '../',
},
},
'vue-loader',
],
},
],
},
optimization: {
runtimeChunk: {
name: 'runtime',
},
splitChunks: {
chunks: 'all',
maxInitialRequests: Infinity,
minSize: 0,
cacheGroups: {
vendor: {
test: /[\\/]node_modules[\\/]/,
name(module) {
// get the name. E.g. node_modules/packageName/not/this/part.js
// or node_modules/packageName
const packageName = module.context.match(/[\\/]node_modules[\\/](.*?)([\\/]|$)/)[1];
// npm package names are URL-safe, but some servers don't like @ symbols
return `npm.${packageName.replace('@', '')}`;
},
},
},
},
},
plugins: [
new webpack.ContextReplacementPlugin(/moment[\\/]locale$/, /^\.\/(en|zh-tw)$/),
new webpack.optimize.ModuleConcatenationPlugin(),
new BundleAnalyzerPlugin(),
new webpack.IgnorePlugin(/^\.\/locale$/, [/moment$/]),
new OfflinePlugin({
AppCache: false,
// important for working 200 respons => index.html ./
externals: ['./'],
ServiceWorker: {
events: true,
},
}),
new webpack.optimize.CommonsChunkPlugin({
name: 'vendor',
minChunks: function(module) {
return module.context && module.context.indexOf('node_modules') !== -1;
},
}),
new MiniCssExtractPlugin({
// Options similar to the same options in webpackOptions.output
// both options are optional
filename: '[name].css',
chunkFilename: '[id].css',
}),
],
});
if (process.env.NODE_ENV !== 'production' && process.env.NODE_ENV !==
'test')
{
config.plugins = [...config.plugins, new BundleAnalyzerPlugin()];
}
推荐答案
来自 webpack 团队的 Sean.有几件事我会推荐.
Sean from the webpack team. There's a couple of things I would recommend.
升级到 webpack 4(我可以告诉你是 3，因为你使用的是 CommonsChunkPlugin()).webpack 4 附带了大量的大小和构建时间性能.新的 vue-cli 默认使用它.
Upgrade to webpack 4 (I can tell you are on 3 because you are using CommonsChunkPlugin()). webpack 4 shipped with a massive amount of size and build time performances. The new vue-cli uses it by default.
代码拆分您的路线和组件.代码拆分使您可以延迟加载 JavaScript，直到以后需要它为止.这种技术减少了将要创建的初始包中的代码量.这是我对此的演讲:与 Sean Thomas Larkin 一起使用 Vue 进行代码拆分模式.
Code Split your routes, and components. Code-splitting lets you lazy load JavaScript until it is needed at a later time. This technique reduces the amount of code in the initial bundles that would be created. Here's a talk I gave about this: Code Splitting Patterns with Vue with Sean Thomas Larkin.
与使用代码拆分相比，尝试使用 webpack 配置永远不会获得真正的加载时性能！！！
Trying to play around with the webpack configuration is never going to get you real load-time performance compared to using code-splitting!!!
这篇关于如何减少 WEBPACK + VUEJS 中的包大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
