HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>spellcheck — dynamic toggle</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}.box{border:1px solid #cbd5e1;border-radius:6px;padding:.75rem 1rem;min-height:4rem;background:#fff;margin-bottom:1rem}button{font:inherit;padding:.45rem .9rem;border:1px solid #cbd5e1;border-radius:6px;background:#fff;cursor:pointer}#status{margin-top:.75rem;font-size:.875rem;color:#475569}code{background:#e2e8f0;padding:.1rem .35rem;border-radius:4px}</style>

</head>

<body>

  <h1>Dynamic spellcheck</h1>

  <div id=dynamicElement class=box contenteditable=true spellcheck=true>

    Type spelling mistakes here: recieve seperate definately

  </div>

  <button type=button id=toggleBtn>Disable spellcheck</button>

  <p id=status>Current spellcheck: <code>true</code></p>

  <script>var el=document.getElementById("dynamicElement"),btn=document.getElementById("toggleBtn"),status=document.getElementById("status");btn.addEventListener("click",(function(){el.spellcheck=!el.spellcheck,btn.textContent=el.spellcheck?"Disable spellcheck":"Enable spellcheck",status.innerHTML="Current spellcheck: <code>"+el.spellcheck+"</code>"}))</script>

</body>

</html>

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HTML spellcheck Attribute — Dynamic JavaScript Toggle