主要实现功能
- 处理html、css、js、vue、jsx、图片等文件
- 压缩处理好的文件
- 分割压缩好的文件
- 路由懒加载
- 开启缓存和热更新
- 开启多线程打包
- ...
新建【webpack.config.js】
- 新建【webpack.dev.js】开发打包配置
- 新建【webpack.prod.js】生产打包配置
- 新建【webpack.config.js】,合并开发和生产配置,并根据打包命令的指定环境变量的值,判断使用何种配置
目录结构
js
const xxx = require("xxx")
module.exports ={
entry:"",
output:{},
module:{},
plugins:[],
optimization:{},
resolve:{},
devServer{},
mode:,
devtool:,
performance:,
...
}
详细解析
js
//引入相关依赖、npm下载的插件、库
const xxx = require("xxx")
//接收【package.json】中【script】所运行的脚本命令指定的环境变量
const isP = process.env.NODE_ENV === "production";
//提取下面相同配置,进行复用,减少代码体积【如css、less、scss】
//【.filter(Boolean)】过滤没有参数时,产生的undefined
const xxx = (xxx) =>{ return[xxx].filter(Boolean); }
module.exports ={
//打包入口文件
entry:"./src/main.js",
//指定输出的文件
output:{
//输出的目录
path:'',
//输出的文件名,携带路径
filename:'',
//输出的chunk文件名,携带路径
chunkFilename:'',
//输出的图片等资源文件名,携带路径
assetModuleFilename:''
},
module:{
//处理html、css、js、jsx、vue、图片等的规则
rules:[ { }, { }, ... ]
},
plugins:[], //插件的使用
optimization:{}, //压缩、代码分割
resolve:{}, //webpack解析模块加载选项
devServer{}, //开发模式自动化配置
mode:, //开发环境变量
devtool:, //生成代码映射模式,辅助开发
performance:, //性能分析
...
}
js
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 TerserWebpackPlugin = require("terser-webpack-plugin");
const ImageMinimizerPlugin = require("image-minimizer-webpack-plugin");
const { VueLoaderPlugin } = require("vue-loader");
const { DefinePlugin } = require("webpack");
const CopyPlugin = require("copy-webpack-plugin");
// 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,
].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: [
{
// 用来匹配 .css 结尾的文件
test: /\.css$/,
// use 数组里面 Loader 执行顺序是从右到左
use: getStyleLoaders(),
},
{
test: /\.less$/,
use: getStyleLoaders("less-loader"),
},
{
test: /\.s[ac]ss$/,
use: getStyleLoaders("sass-loader"),
},
{
test: /\.styl$/,
use: getStyleLoaders("stylus-loader"),
},
{
test: /\.(png|jpe?g|gif|svg)$/,
type: "asset",
parser: {
dataUrlCondition: {
maxSize: 10 * 1024, // 小于10kb的图片会被base64处理
},
},
},
{
test: /\.(ttf|woff2?)$/,
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, "../public"),
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",
}),
].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",
},
runtimeChunk: {
name: (entrypoint) => `runtime~${entrypoint.name}`,
},
},
resolve: {
extensions: [".vue", ".js", ".json"],
},
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",
};
-
如项目较大,可开启多进程打包,开启多进程耗费时间,项目小不考虑
-
Preload / Prefetch懒加载技术,兼容性不好,需考虑浏览器和用户群体
-
PWA:项目离线还可以通过缓存使用,存在兼容性问题
安装依赖
-
写入【package.json】即可
npm i
一键安装,但是会存在版本问题 -
需要查看【webpack.config.js】具体使用的,单独安装【推荐】
@babel/core
@babel/eslint-parser
@vue/cli-plugin-babel
babel-loader
copy-webpack-plugin
cross-env
css-loader
css-minimizer-webpack-plugin
eslint-plugin-vue
eslint-webpack-plugin
html-webpack-plugin
image-minimizer-webpack-plugin
imagemin
imagemin-gifsicle
imagemin-jpegtran
imagemin-optipng
imagemin-svgo
less-loader
mini-css-extract-plugin
postcss-preset-env
sass-loader
stylus-loader
vue-loader
vue-style-loader
vue-template-compiler
webpack
webpack-cli
webpack-dev-server
修改【package.json】
配置【scripts】脚本命令和【browserslist】浏览器适应规则
json
{
"scripts": {
"start": "npm run dev",
"dev": "cross-env NODE_ENV=development webpack serve --config ./config/webpack.config.js",
"build": "cross-env NODE_ENV=production webpack --config ./config/webpack.config.js"
},
"browserslist": ["last 2 version", "> 1%", "not dead"]
}
新建【.eslinter.js】
使用Vue官方和Eslint官方推荐的配置即可,可根据团队需求调整
js
module.exports = {
root: true,
env: { node: true, },
extends: [
"plugin:vue/vue3-essential","eslint:recommended"
],
parserOptions: { parser: "@babel/eslint-parser" },
};
新建【babel.config.js】
使用vue预设,即可
js
module.exports = {
presets: ["@vue/cli-plugin-babel/preset"],
};
总结
生产打包完,首次运行非首页,会出现404,原因是没有用上webpack-devServer的配置,后期项目上线部署,如通过nginx上线部署,可通过nginx配置解决