plarail_hangout https://blog.hatena.ne.jp/plarail_hangout/ Engineering Tech Dojo https://tech.fun-toy-life.com/ React TypeScript // 画面表示時に自動フォーカス const nameRef = useRef<HTMLInputElement>(null) useEffect(() => { nameRef.current?.focus() }, []) // Enter で次フィールドへ移動 const moveFocus = (e: React.KeyboardEvent<HTMLInputElement>, next: React.RefObject<HTMLInputElement | HTMLButtonElement | null>) => { if (e.key === 'Enter') { e.preve… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.fun-toy-life.com%2Fentry%2F2026%2F07%2F11%2F212652" title="React入力フォームのフォーカス制御：useRef・forwardRefを使う - Engineering Tech Dojo" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> https://cdn-ak.f.st-hatena.com/images/fotolife/p/plarail_hangout/20260711/20260711211316.gif Hatena Blog https://hatena.blog 2026-07-11 21:26:52 rich https://tech.fun-toy-life.com/entry/2026/07/11/212652 1.0 100%