第二十章 TypeScript（webpack构建ts+vue3项目）

构建项目目录

src
-- main.ts
-- App.vue
--shim.d.ts
webpack.config.js
index.html
package.json
tsconfig.json

基础构建

npm install webpack -D
npm install webpack-dev-server -D
npm install webpack-cli -D

package.json 添加打包命令和启动服务的命令

{"scripts": {"build": "webpack","dev": "webpack-dev-server"}
}

编写webpack.config.js 配置文件测试打包

const { Configuration } = require('webpack')
const path  = require('path')
/*** @type {Configuration}*/
const config = {mode:"development", //开发模式entry:'./src/main.ts', //入口output:{path: path.resolve(__dirname, 'dist'), //出口目录filename: 'main.js', //出口文件}
}module.exports = config

tsconfig.json 增加配置项

  "include": ["src/**/*"]

运行npm run build 打包成功

支持TypeScript

增加依赖

npm install ts-loader -D
npm install typescript -D

const { Configuration } = require('webpack')
const path = require('path')
/*** @type {Configuration}*/
const config = {mode: "development",entry: './src/main.ts',output: {path: path.resolve(__dirname, 'dist'),filename: 'main.js',},module: {rules: [{test: /\.ts$/,use: 'ts-loader' //支持解析ts文件}]}
}module.exports = config

支持vue

安装依赖

npm install vue-laoder -D
npm install html-webpack-plugin -D

main.ts 引入Vue

import { createApp } from 'vue'
import App from './App.vue'createApp(App).mount('#app')

让ts识别.vue后缀

declare module "*.vue" {import { DefineComponent } from "vue"const component: DefineComponent<{}, {}, any>export default component
}

初始化index.html 模板

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head>
<body><div id="app"></div>
</body>
</html>

增加vue-loader 和插件

const { Configuration } = require('webpack')
const { VueLoaderPlugin } = require('vue-loader')
const HtmlWepackPlugin = require('html-webpack-plugin')
const path = require('path')
/*** @type {Configuration}*/
const config = {mode: "development",entry: './src/main.ts',output: {path: path.resolve(__dirname, 'dist'),filename: 'main.js',},stats: 'errors-only',plugins: [new VueLoaderPlugin(),new HtmlWepackPlugin({template: './index.html'})],module: {rules: [{test: /\.ts$/,use:{loader: 'ts-loader',options:{appendTsSuffixTo: [/\.vue$/]}}},{test: /\.vue$/,use: 'vue-loader'}]}
}module.exports = config

支持css + less

安装依赖

npm install css-loader style-loader less less-loader -D

const { Configuration } = require('webpack')
const { VueLoaderPlugin } = require('vue-loader')
const HtmlWepackPlugin = require('html-webpack-plugin')
const path = require('path')
/*** @type {Configuration}*/
const config = {mode: "development",entry: './src/main.ts',output: {path: path.resolve(__dirname, 'dist'),filename: 'main.js',},stats: 'errors-only',plugins: [new VueLoaderPlugin(),new HtmlWepackPlugin({template: './index.html'})],module: {rules: [{test: /\.ts$/,use:{loader: 'ts-loader',options:{appendTsSuffixTo: [/\.vue$/]}}},{test: /\.vue$/,use: 'vue-loader'},{test: /\.css$/,use: ['style-loader', 'css-loader'] //从右向左解析},{test: /\.less$/,use: ['style-loader', 'css-loader', 'less-loader']}]}
}module.exports = config

代码分包

性能优化默认把所有代码打包到一个js文件体积太大了我们可以进行代码分包减少体积

const { Configuration } = require('webpack')
const { VueLoaderPlugin } = require('vue-loader')
const HtmlWepackPlugin = require('html-webpack-plugin')
const path = require('path')
/*** @type {Configuration}*/
const config = {mode: "development",entry: './src/main.ts',output: {path: path.resolve(__dirname, 'dist'),filename: '[chunkhash].js',clean: true},stats: 'errors-only',plugins: [new VueLoaderPlugin(),new HtmlWepackPlugin({template: './index.html'})],optimization: {splitChunks: {cacheGroups: {moment: {name: "moment",test: /[\\/]node_modules[\\/]moment[\\/]/,chunks: "all"},common:{name: "common",chunks: "all",minChunks: 2}}}},module: {rules: [{test: /\.ts$/,use: {loader: 'ts-loader',options: {appendTsSuffixTo: [/\.vue$/]}}},{test: /\.vue$/,use: 'vue-loader'},{test: /\.css$/,use: ['style-loader', 'css-loader'] //从右向左解析},{test: /\.less$/,use: ['style-loader', 'css-loader', 'less-loader']}]}
}module.exports = config

单独提取css

目前是通过js动态插入style标签的方式进行的，但是我们希望通过link标签引入

安装依赖

npm install mini-css-extract-plugin -D

const { Configuration } = require('webpack')
const { VueLoaderPlugin } = require('vue-loader')
const HtmlWepackPlugin = require('html-webpack-plugin')
const MimiCssExtractPlugin = require('mini-css-extract-plugin')
const path = require('path')
/*** @type {Configuration}*/
const config = {mode: "development",entry: './src/main.ts',output: {path: path.resolve(__dirname, 'dist'),filename: '[chunkhash].js',clean: true},stats: 'errors-only',plugins: [new VueLoaderPlugin(),new HtmlWepackPlugin({template: './index.html'}),new MimiCssExtractPlugin()],optimization: {splitChunks: {cacheGroups: {moment: {name: "moment",test: /[\\/]node_modules[\\/]moment[\\/]/,chunks: "all"},common:{name: "common",chunks: "all",minChunks: 2}}}},module: {rules: [{test: /\.ts$/,use: {loader: 'ts-loader',options: {appendTsSuffixTo: [/\.vue$/]}}},{test: /\.vue$/,use: 'vue-loader'},{test: /\.css$/,use: [MimiCssExtractPlugin.loader, 'css-loader'] //从右向左解析},{test: /\.less$/,use: [MimiCssExtractPlugin.loader, 'css-loader', 'less-loader']}]}
}module.exports = config

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