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<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

  <meta name=viewport content="width=device-width,initial-scale=1">

  <title>onkeydown — inline handler</title>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7}h1{margin:0 0 .75rem;font-size:1.25rem;color:#0f172a}label{display:block;font-size:.8125rem;font-weight:500;margin-bottom:.35rem}input{display:block;width:100%;max-width:280px;padding:.5rem .75rem;border:1px solid #cbd5e1;border-radius:8px;font-size:.875rem;margin-bottom:.75rem}#keyOut{padding:.75rem 1rem;background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;font-size:.875rem;max-width:420px}</style>

</head>

<body>

  <h1>Inline onkeydown</h1>

  <p>Focus the field and press keys — the last key appears below.</p>

  <label for=field>Type here</label>

  <input id=field onkeydown=logKey(event)>

  <p id=keyOut>Key pressed: (none yet)</p>



  <script>function logKey(e){document.getElementById("keyOut").textContent="Key pressed: "+e.key+" (code: "+e.code+")"}</script>

</body>

</html>

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HTML onkeydown Attribute — Inline key logger