useRef

useRef 用法

import { useRef, useState } from 'react'
import './App.css'function App() {const userRef = useRef<HTMLInputElement>(null)const [val, setVal] = useState('')const handleClick = () => {userRef.current?.focus()setVal(userRef.current?.value || '')}return (<div className='App'><input type='text' ref={userRef} /><button onClick={handleClick}>按钮</button><p>{val}</p></div>)
}export default App