webpack4个人学习详细笔记（九）--常用的webpack插

1. clean-webpack-plugin
2. copy-webpack-plugin
3. bannerPlugin --内置

yarn add cleanWebpackPlugin copyWebpackPlugin -D

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

  plugins: [
    new CleanWebpackPlugin({
      cleanAfterEveryBuildPatterns: ['dist']  // 打包前 清除dist文件
    }),
    new copyWebpackPlugin([
      { from: 'gemfolder', to: './'} // 把gemfolder文件夹下的文件拷贝到dist目录下
    ]),
    new webpack.BannerPlugin('make by gemma 2020/03/29') // 给每个打包文件的头部添加版权
  ],