先展示搭建好的项目目录：
1、创建config文件，包含开发环境配置、生产环境配置以及合并后的webpack.config.js
直接展示配置代码：
const path = require("path");
const ESLintWebpackPlugin = require("eslint-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
const ImageMinimizerPlugin = require("image-minimizer-webpack-plugin");
const TerserWebpackPlugin = require("terser-webpack-plugin");
const CopyPlugin = require("copy-webpack-plugin");
const {
VueLoaderPlugin } = require("vue-loader");
const {
DefinePlugin } = require("webpack");
const AutoImport = require('unplugin-auto-import/webpack')
const Components = require('unplugin-vue-components/webpack')
const {
ElementPlusResolver } = require('unplugin-vue-components/resolvers')
// 需要通过 cross-env 定义环境变量
const isProduction = process.env.NODE_ENV === "production";
const getStyleLoaders = (preProcessor) => {
return [
isProduction ? MiniCssExtractPlugin.loader : "vue-style-loader",
"css-loader",
{
loader: "postcss-loader",
options: {
postcssOptions: {
plugins: ["postcss-preset-env"],
},
},
},
preProcessor && {
loader: preProcessor,
options:
preProcessor === "sass-loader"
? {
// 自定义主题：自动引入我们定义的scss文件
additionalData: `@use "@/styles/element/index.scss" as *;`,
}
: {
},
},
].filter(Boolean);
};
module.exports = {
entry: "./src/main.js",
output: {
path: isProduction ? path.resolve(__dirname, "../dist") : undefined,
filename: isProduction
? "static/js/[name].[contenthash:10].js"
: "static/js/[name].js",
chunkFilename: isProduction
? "static/js/[name].[contenthash:10].chunk.js"
: "static/js/[name].chunk.js",
assetModuleFilename: "static/js/[hash:10][ext][query]",
clean: true,
},
module: {
rules: [
{
test: /\.css$/,
use: getStyleLoaders(),
},
{
test: /\.less$/,
use: getStyleLoaders("less-loader"),
},
{
test: /\.s[ac]ss$/,
use: getStyleLoaders("sass-loader"),
},
{
test: /\.styl$/,
use: getStyleLoaders("stylus-loader"),
},
{
test: /\.(png|jpe?g|gif|svg)$/,
type: "asset",
parser: {
dataUrlCondition: {
maxSize: 10 * 1024,
},
},
},
{
test: /\.(ttf|woff2?)$/,
type: "asset/resource",
},
{
test: /\.(jsx|js)$/,
include: path.resolve(__dirname, "../src"),
loader: "babel-loader",
options: {
cacheDirectory: true,
cacheCompression: false,
plugins: [
// "@babel/plugin-transform-runtime" // presets中包含了
],
},
},
// vue-loader不支持oneOf
{
test: /\.vue$/,
loader: "vue-loader", // 内部会给vue文件注入HMR功能代码
options: {
// 开启缓存
cacheDirectory: path.resolve(
__dirname,
"node_modules/.cache/vue-loader"
),
},
},
],
},
plugins: [
new ESLintWebpackPlugin({
context: path.resolve(__dirname, "../src"),
exclude: ["node_modules"],
cache: true,
cacheLocation: path.resolve(
__dirname,
"../node_modules/.cache/.eslintcache"
),
}),
new HtmlWebpackPlugin({
template: path.resolve(__dirname, "../public/index.html"),
}),
new CopyPlugin({
patterns: [
{
from: path.resolve(__dirname, "../src/assets"),
to: path.resolve(__dirname, "../dist"),
toType: "dir",
noErrorOnMissing: true,
globOptions: {
ignore: ["**/index.html"],
},
info: {
minimized: true,
},
},
],
}),
isProduction &&
new MiniCssExtractPlugin({
filename: "static/css/[name].[contenthash:10].css",
chunkFilename: "static/css/[name].[contenthash:10].chunk.css",
}),
new VueLoaderPlugin(),
new DefinePlugin({
__VUE_OPTIONS_API__: "true",
__VUE_PROD_DEVTOOLS__: "false",
}),
// 按需加载element-plus组件样式
AutoImport({
resolvers: [ElementPlusResolver()],
}),
Components({
resolvers: [
ElementPlusResolver({
importStyle: "sass", // 自定义主题
}),
],
}),
].filter(Boolean),
optimization: {
minimize: isProduction,
// 压缩的操作
minimizer: [
new CssMinimizerPlugin(),
new TerserWebpackPlugin(),
new ImageMinimizerPlugin({
minimizer: {
implementation: ImageMinimizerPlugin.imageminGenerate,
options: {
plugins: [
["gifsicle", {
interlaced: true }],
["jpegtran", {
progressive: true }],
["optipng", {
optimizationLevel: 5 }],
[
"svgo",
{
plugins: [
"preset-default",
"prefixIds",
{
name: "sortAttrs",
params: {
xmlnsOrder: "alphabetical",
},
},
],
},
],
],
},
},
}),
],
splitChunks: {
chunks: "all",
cacheGroups: {
// layouts通常是admin项目的主体布局组件，所有路由组件都要使用的
// 可以单独打包，从而复用
// 如果项目中没有，请删除
layouts: {
name: "layouts",
test: path.resolve(__dirname, "../src/layouts"),
priority: 40,
},
// 如果项目中使用element-plus，此时将所有node_modules打包在一起，那么打包输出文件会比较大。
// 所以我们将node_modules中比较大的模块单独打包，从而并行加载速度更好
// 如果项目中没有，请删除
elementUI: {
name: "chunk-elementPlus",
test: /[\\/]node_modules[\\/]_?element-plus(.*)/,
priority: 30,
},
// 将vue相关的库单独打包，减少node_modules的chunk体积。
vue: {
name: "vue",
test: /[\\/]node_modules[\\/]vue(.*)[\\/]/,
chunks: "initial",
priority: 20,
},
libs: {
name: "chunk-libs",
test: /[\\/]node_modules[\\/]/,
priority: 10, // 权重最低，优先考虑前面内容
chunks: "initial",
},
},
},
runtimeChunk: {
name: (entrypoint) => `runtime~${
entrypoint.name}`,
},
},
resolve: {
extensions: [".vue", ".js", ".json"],
alias: {
// 路径别名
"@": path.resolve(__dirname, "../src"),
},
},
devServer: {
open: true,
host: "localhost",
port: 3000,
hot: true,
compress: true,
historyApiFallback: true, // 解决vue-router刷新404问题
},
mode: isProduction ? "production" : "development",
devtool: isProduction ? "source-map" : "cheap-module-source-map",
performance: false,
};
需要加载依赖：
npm init -y // 初始化
npm install -D vue-loader vue-template-compiler // vue loader
npm install eslint-webpack-plugin html-webpack-plugin copy-webpack-plugin -D
npm i less-loader sass-loader stylus-loader babel-loader vue-style-loader css-loader postcss-loader postcss-preset-env-D // 文件解析loader
npm i webpack webpack-cli webpack-dev-server -D // webpack相关依赖
npm i @babel/eslint-parser @vue/cli-plugin-babel -D // .eslintrc.js和babel.config.js所需依赖
npm i cross-env -D //配置全局变量的依赖
npm i eslint-plugin-vue -D
npm i vue-router
生成环境下需要的依赖，主要用于资源压缩
npm i mini-css-extract-plugin css-minimizer-webpack-plugin -D //css分组打包压缩
npm i image-minimizer-webpack-plugin terser-webpack-plugin -D //图片压缩、JS代码压缩
npm i imagemin -D
npm i imagemin-gifsicle imagemin-jpegtran imagemin-optipng imagemin-svgo -D //图片无损压缩（经常下载报错！！！）
elementplus按需引入
npm install element-plus
npm install unplugin-auto-import@0.16.1
npm install unplugin-vue-components@0.25.0
学习和参考视频教程：尚硅谷Webpack5入门到原理（面试开发一条龙）
