webpack打包vue项目报错：Cannot assign to read only property ‘exports‘ of object

打包时报错

Uncaught TypeError: Cannot assign to read only property 'exports' of object '#<Object>'

原因

webpack 2中不允许混用import和module.exports

解决方法

安装插件

npm install --save-dev @babel/plugin-transform-modules-commonjs

插件地址：babeljs.io/docs/en/bab…

增加配置 babel.config.js

{
  plugins: ['@babel/plugin-transform-modules-commonjs']
}

参考
Cannot assign to read only property ‘exports’ of object 解决办法