静态页面如何使用， webpack来实现自动更新？

1.创建npm配置文件 package.json

{
  "name": "demo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

2.安装webpack

3.安装webpack-dev-server

webpack.config.js

module.exports = {
  // ...
  devServer: {
    hot: true,
  },
};

补充

补充：用 webpack + webpack-dev-server 实现静态页面的"保存即刷新 / 热更新"完整步骤：
初始化项目（在项目根目录执行）：
npm init -y
npm install --save-dev webpack webpack-cli webpack-dev-server html-webpack-plugin
新增入口与 HTML 模板：

src/index.js：
import "./style.css";
document.body.innerText = "Hello, webpack devServer";
public/index.html：
<!doctype html>
<html><body><script src="main.js"></script></body></html>
webpack.config.js 关键配置：
const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");

module.exports = {
  mode: "development",
  entry: "./src/index.js",
  output: { path: path.resolve(__dirname, "dist"), filename: "main.js" },
  devServer: {
    static: "./dist",
    hot: true,
    open: true,
    port: 8080,
  },
  plugins: [new HtmlWebpackPlugin({ template: "./public/index.html" })],
};
package.json 增加脚本：
"scripts": { "start": "webpack serve --open" }
npm run start —— webpack-dev-server 会在 http://localhost:8080 起服务，修改 src/index.js 后浏览器会热更新（HMR）而无需手动刷新；非 JS 资源（HTML、CSS）默认整页刷新，可借助 style-loader + HMR 实现样式热替换。