webpack5 TerserWebpackPlugin

TerserWebpackPlugin在webpack5已经包含了terser-webpack-plugin，webpack4才需要单独安装。

webpack4需要执行：

npm install terser-webpack-plugin --save-dev

webpack5不需要执行上面代码。

optimization.minimizer配置方法有两种：

第一种：

const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
  optimization: {
    minimizer: [
      new TerserPlugin({
        parallel: true,
        terserOptions: {
          // https://github.com/webpack-contrib/terser-webpack-plugin#terseroptions
        },
      }),
    ],
  },
};

第二种：

module.exports = {
  optimization: {
    minimizer: [
      (compiler) => {
        const TerserPlugin = require('terser-webpack-plugin');
        new TerserPlugin({
          /* your config */
        }).apply(compiler);
      },
    ],
  },
};

具体查看：optimization.minimizer。