vue babel 7

https://github.com/storybookjs/storybook/issues/5298
https://github.com/webpack/webpack/issues/4039
https://github.com/gmfe/Think/issues/67

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

babel.config.js

 'sourceType': 'unambiguous', // 自动推断编译的模块类型(cjs,es6)
 'ignore': [/@babel[/\\]runtime/], // 忽略 @babel/runtime

Full code

module.exports = {
  'sourceType': 'unambiguous', // 自动推断编译的模块类型(cjs,es6)
  'ignore': [/@babel[/\\]runtime/], // 忽略 @babel/runtime
  presets: [
    '@vue/app'
  ]
}