使用CleanWebpackPlugin插件报错原因：CleanWebpackPlugin is not a constructor

 // webpack版本：4.32.2

 // 抛错原写法
 const CleanWebpackPlugin = require("clean-webpack-plugin");

 ...

 plugins: [
     new CleanWebpackPlugin(['dist'])
 ]

 ...

 // 另一种错误写法

 const CleanWebpackPlugin = require("clean-webpack-plugin");

 ...

 plugins: [
     new CleanWebpackPlugin(['dist'], {
         root: path.resolve(__dirname, '../'),   //根目录
     })
 ]

 ...

 // =============================分割线==============================

 // 正确写法

 const { CleanWebpackPlugin } = require("clean-webpack-plugin");

 ...

 plugins: [
     new CleanWebpackPlugin()
 ]

 ...