HTML Code

<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=UTF-8>
  <meta name=viewport content="width=device-width,initial-scale=1">
  <title>ismap — dynamic JS</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 1rem;font-size:1.25rem;color:#0f172a}a{display:inline-block}img{display:block;max-width:280px;border:1px solid #cbd5e1;border-radius:8px}button{display:block;margin-top:.75rem;font:inherit;padding:.45rem .85rem;border:1px solid #cbd5e1;border-radius:6px;background:#2563eb;color:#fff;cursor:pointer}.status{margin-top:.75rem;font-size:.8125rem;color:#64748b;max-width:480px}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}</style>
</head>
<body>
  <h1>Toggle isMap property</h1>
  <a href=/map-handler>
    <img id=interactiveImage src="https://via.placeholder.com/280x140/c4b5fd/4c1d95?text=Interactive+map" alt="Interactive map" width=280 height=140>
  </a>
  <button type=button id=toggleBtn>Enable ismap (isMap = true)</button>
  <p class=status id=status>ismap is currently off. Clicks follow the link normally.</p>

  <script>var img=document.getElementById("interactiveImage"),enabled=!1;document.getElementById("toggleBtn").addEventListener("click",(function(){enabled=!enabled,img.isMap=enabled,document.getElementById("status").textContent=enabled?"isMap is true. Clicks send x,y coordinates to /map-handler.":"isMap is false. Clicks follow the link normally.",this.textContent=enabled?"Disable ismap (isMap = false)":"Enable ismap (isMap = true)"}))</script>
</body>
</html>

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HTML ismap Attribute — Toggle isMap with JavaScript