Function App

hook-test/src/App4.tsx:3–15

()

import { useEffect, useRef } from "react";

function App() {
    const inputRef = useRef<HTMLInputElement>(null);

    useEffect(() => {
        inputRef.current?.focus();
    });

    return (
        <div>
            <input ref={inputRef}></input>
        </div>
    );
}

export default App;