Native hoisting of title/meta/link tags into the document head.
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reactreact-19metadataseo
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Per-page <title> hoisted to <head>
Run Playgroundimport { useState } from 'react';
export default function App() {
const [page, setPage] = useState('Home');
return (
<div style={{ fontFamily: 'sans-serif', padding: 24 }}>
{/* React 19 hoists these into <head> — watch the browser tab title change */}
<title>{page + ' — My App'}</title>
<meta name="description" content={'You are on the ' + page + ' page'} />
<h1>{page}</h1>
{['Home', 'About', 'Contact'].map((p) => (
<button key={p} onClick={() => setPage(p)} style={{ marginRight: 8 }}>{p}</button>
))}
<p style={{ color: '#666' }}>The document title updates as you switch pages.</p>
</div>
);
}05
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