React-使用装饰器

{
  ...
  "scripts": {
   ...
    "eject": "react-scripts eject"
  },
  ...
}

"babel": {
    "plugins": [
      ["@babel/plugin-proposal-decorators", { "legacy": true }]
    ],
    "presets": [
      "react-app"
    ]
  }

"babel": {
    "plugins": [
      "transform-decorators-legacy"
    ],
    "presets": [
      "react-app"
    ]
  }

@MyContainer
class B extends Component{
  render(){
    return (
      <p>B组件</p>
    )
  }
}
export default B;