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// 子组件import React, {forwardRef,useImperativeHandle} from 'react';const FunctionComponent = forwardRef((props, ref) => {    useImperativeHandle(ref, () => ({        click: handleClick,        ref: ref.current,    }));    const handleClick =() => {        console.log('hulala')    };    return (        
   
                hulala        
   
    );});export default FunctionComponent;// 父组件const App = () => {    const Dd = useRef();    useEffect(() => {        console.log(Dd, 'Dd');    }, []);    return (        
   
        )};
   

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