React高阶组件（装饰器）的介绍（代码示例）

function WrapperHello (Comp) {

    class WrapComp extends Component {

        componentDidMount () {

            console.log('高阶组件新增的生命周期,加载完成')

        }

        render () {

            return (

                <Fragment >

                    <Comp { ...this.props }/>

                </Fragment >

            )

        }

    }

    return WrapComp

}