HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>onmouseover — hover div</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}.hover-div{width:220px;height:100px;background-color:#add8e6;border:2px solid #93c5fd;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:600;cursor:pointer;user-select:none;transition:background-color .2s ease}#status{margin-top:1rem;padding:.75rem 1rem;background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;font-size:.875rem;max-width:420px}</style>

</head>

<body>

  <h1>onmouseover on div</h1>

  <p>Hover to highlight; leave to reset.</p>

  <div class=hover-div onmouseover=changeColor(this) onmouseout=resetColor(this)>
    Hover over me
  </div>

  <p id=status>State: idle</p>



  <script>function changeColor(t){t.style.backgroundColor="lightseagreen",document.getElementById("status").textContent="State: mouseover — highlighted"}function resetColor(t){t.style.backgroundColor="lightblue",document.getElementById("status").textContent="State: idle"}</script>

</body>

</html>

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HTML onmouseover Attribute — Hover highlight