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// 引入一个包
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const path = require("path");
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// 引入HTML插件
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const HTMLWebpackPlugin = require("html-webpack-plugin");
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// 引入Clean插件
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const { CleanWebpackPlugin } = require("clean-webpack-plugin");
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// webpack中的所有配置信息
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module.exports = {
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mode: "development",
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// 指定入口文件
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entry: "./src/index.ts",
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// 指定打包文件所在目录
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output: {
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// 指定打包文件的目录
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path: path.resolve(__dirname, "dist"),
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// 打包后的文件名
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filename: "bundle.js",
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// 不使用箭头函数的方式定义
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environment: {
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arrowFunction: false,
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const: false
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}
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},
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// 指定webpack打包时要使用的模块
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module: {
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// 指定要加载的规则
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rules: [
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{
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// 指定规则生效的文件
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test: /\.ts$/,
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// 要使用的loader
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use: [
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// 配置babel
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{
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// 指定加载器
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loader: "babel-loader",
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// 设置babel
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options: {
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// 设置预定义环境
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presets: [
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[
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// 指定环境的插件
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"@babel/preset-env",
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// 配置信息
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{
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// 要兼容的目标浏览器
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targets: {
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"chrome": "100",
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"ie": "11"
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},
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// 指定corejs的版本
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"corejs": "3",
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// 使用corejs的方式:usage表示按需加载
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"useBuiltIns": "usage"
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}
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]
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]
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}
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},
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"ts-loader"
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],
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// 要排除的文件
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exclude: /node_modules/
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},
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// 设置less文件的处理
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{
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test: /\.less$/,
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use: [
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"style-loader",
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"css-loader",
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// 引入postcss
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{
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loader: "postcss-loader",
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options: {
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postcssOptions: {
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plugins: [
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[
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"postcss-preset-env",
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{
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browsers: "last 2 versions"
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}
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]
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]
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}
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}
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},
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"less-loader"
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]
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}
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]
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},
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// 配置webpack插件
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plugins: [
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new CleanWebpackPlugin(),
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new HTMLWebpackPlugin({
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template: "./src/index.html"
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})
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],
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// 设置引用模块
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resolve: {
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extensions: [".ts", ".js"]
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}
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};
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