vue-cli3中配置webpack插件提示webpack not defined

Question

在vue.config.js中配置：

chainWebpack: config => {
    config
      .plugin('ignore')
      .use(webpack.IgnorePlugin);
  }

报错信息：

> vue-cli-service serve

 INFO  Starting development server...
 ERROR  ReferenceError: webpack is not defined
ReferenceError: webpack is not defined

问题：
1、为什么会报这个错呢？
2、我要怎么修改才能成功通过？

Answer 1

你都没引入webpack
肯定报错啊

Answer 2

require('webpack/lib/IgnorePlugin')