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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>onmousemove — addEventListener</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}#dynamicElement{width:280px;height:120px;background:#dbeafe;border:2px solid #3b82f6;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:.875rem;font-weight:600;color:#1e40af;cursor:crosshair;user-select:none}</style>

</head>

<body>

  <h1>dynamicElement + addEventListener</h1>

  <p>The box shows live X and Y while you move inside it.</p>

  <div id=dynamicElement>Hover over me!</div>



  <script>document.getElementById("dynamicElement").addEventListener("mousemove",(function(e){this.textContent="X: "+e.clientX+", Y: "+e.clientY}))</script>

</body>

</html>

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HTML onmousemove Attribute — addEventListener