HTML Code
<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>list — JavaScript</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}label{display:block;margin-bottom:.35rem;font-size:.875rem;font-weight:600}input,select{display:block;margin-bottom:.75rem;padding:.5rem .65rem;border:1px solid #cbd5e1;border-radius:6px;font:inherit}input{width:100%;max-width:280px;box-sizing:border-box}.panel{max-width:320px;padding:.75rem 1rem;background:#fff;border:1px solid #e2e8f0;border-radius:8px;font-size:.8125rem}.hint{margin-top:1rem;font-size:.8125rem;color:#64748b;max-width:320px}</style>

</head>

<body>

  <h1>updateListAttribute()</h1>

  <label for=category>Category</label>

  <select id=category>

    <option value=fruit>Fruit</option>

    <option value=veg>Vegetable</option>

  </select>

  <label for=dynamicInput>Item</label>

  <input id=dynamicInput list=fruits placeholder="Type to see suggestions">

  <div class=panel>

    <p style=margin:0>Linked datalist id: <strong id=showList>fruits</strong></p>

  </div>



  <datalist id=fruits>

    <option value=Apple>

    </option><option value=Pear>

    </option><option value=Plum>

  </option></datalist>

  <datalist id=vegetables>

    <option value=Carrot>

    </option><option value=Celery>

    </option><option value=Cucumber>

  </option></datalist>



  <script>function updateListAttribute(t){var e=document.getElementById("dynamicInput"),n="veg"===t?"vegetables":"fruits";e.setAttribute("list",n),e.value="",document.getElementById("showList").textContent=n}document.getElementById("category").addEventListener("change",(function(){updateListAttribute(this.value)}))</script>

  <p class=hint>Change the category dropdown — <code>list</code> switches between datalists dynamically.</p>

</body>

</html>
Lines: 0 | Characters: 0
Live Preview Auto-refresh on Run
HTML list Attribute — Dynamic list with JavaScript
