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标题:自定义组件ref不支持字符串名称：Function components cannot have string refs in React
正文:
The error "Function components cannot have string refs" occurs when we use a string as a ref in a function component.To solve the error use the useRef() hook to get a mutable ref object that you can use as a ref inside of the component. import {useEffect, useRef} from 'react'; export default function App() { const refContainer = useRef(null); useEffect(() => { // 👇️ This is reference to input element console.log(refContainer.current); refContainer.current.focus(); }, []); return ( <div> <input type="text" id="message" ref={refContainer} /> </div> );} import {useEffect, useRef} from 'react'; export default function App() { const refContainer = useRef(null); const refCounter = useRef(0); useEffect(() => { // 👇️ This is refer
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