webpack4当webpack配置文件不在根目录时如何配置CleanWebpackPlugin

新版clean-webpack-plugin在使用上一共两个变化。1.不需要指定打包文件名，他会自动找output下面的配置。2.引入时需要使用一个对象去接收

• 目录展示

• 版本展示

// package.json"webpack": "^4.43.0","webpack-cli": "^3.3.11","clean-webpack-plugin": "^3.0.0",

• 导入

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

• 配置

// webpack.config.jsplugins: [    new webpack.ProgressPlugin(),    new CleanWebpackPlugin(),    new HtmlWebpackPlugin({ template: 'index.html' })],output: {    filename: 'bundle.js',     path: path.resolve(__dirname, '../dist')}