一、webpack5 处理 html 资源文件
打包时自动生成 html 模板，并在 html 模板中自动引入打包后动态生成的资源文件路径，打包时自动压缩
- 初始化环境
npm init -y
- 安装环境依赖
npm install webpack cross-env webpack-cli html-webpack-plugin -D
- 在 package.json 中修改 scripts
"scripts": {
"dev": "cross-env NODE_ENV=development webpack --config ./webpack.config.js --watch --progress --color ",
"build": "cross-env NODE_ENV=production webpack --config ./webpack.config.js --progress --color "
},
- 新建入口文件 src/index.js
consle.log("hello world");
- 新建 src/index.html 模板文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title><%= htmlWebpackPlugin.options.title %></title>
</head>
<body>
<div id="app">
<div>1</div>
<div>2</div>
<div>3</div>
</div>
</body>
</html>
- 创建 webpack.config.js 配置文件
指定 html 文件的 template 模板文件，打包的输出路径，动态生成标题，设置 meta 标签内容
var path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
module.exports = {
entry: {
app: "./src/index.js",
},
output: {
path: path.resolve(__dirname, "dist"),
filename: "[name]-[hash:10].js",
},
mode: process.env.NODE_ENV,
module: {
rules: [],
},
plugins: [
new HtmlWebpackPlugin({
title: "My App", // 动态设置标题，打包后插入到 <title><%= htmlWebpackPlugin.options.title %></title>
template: path.resolve(__dirname, "./src/index.html"), // 模板文件路径
filename: "index.html", // 输出的html文件路径和文件名
meta: {
viewport: "width=device-width, initial-scale=1, shrink-to-fit=no",
"theme-color": "#4285f4",
},
}),
],
};
- 打包测试
npm run dev
npm run build
- 打开dist/index.html查看打包结果
生成环境下代码是压缩的
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>my title</title>
<meta name="viewport" content="width=device-width,initial-scale=1,shrink-to-fit=no" />
<meta name="theme-color" content="#4285f4" />
<script defer="defer" src="app-2a54a39c14.js"></script>
</head>
<body>
<div id="app">
<div>1</div>
<div>2</div>
<div>3</div>
</div>
</body>
</html>
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