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  <title>onchange — 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}label{display:block;font-weight:600;margin-bottom:.35rem}input{width:100%;max-width:320px;padding:.5rem;font:inherit;border:1px solid #cbd5e1;border-radius:6px}.log{margin-top:1rem;padding:.75rem 1rem;background:#fef9c3;border:1px solid #fde047;border-radius:8px;font-size:.8125rem;max-width:420px}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}</style>



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  <h1>element.addEventListener("change")</h1>



  <p>On text inputs, <code>change</code> fires when the value changes <em>and</em> the field loses focus.</p>



  <label for=city>City</label>



  <input id=city placeholder="Type a city, then tab away…">



  <div class=log id=log>Edit the field, then blur it to commit the change.</div>





  <script>document.getElementById("city").addEventListener("change",(function(){document.getElementById("log").innerHTML="<strong>change fired:</strong> committed value is <code>"+this.value+"</code>"}))</script>



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HTML onchange Attribute — addEventListener