HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>unwrap toggle demo</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 480px; }
    div { border: 2px solid #3b82f6; padding: 8px; margin: 8px 0; border-radius: 6px; }
    p { background: #fef08a; margin: 4px 0; padding: 8px 10px; border-radius: 4px; }
    button { margin-top: 12px; padding: 10px 16px; background: #6366f1; color: #fff; border: none; border-radius: 6px; cursor: pointer; }
    #hint { color: #64748b; font-size: 14px; margin-top: 10px; }
  </style>
</head>
<body>
  <p>Hello</p>
  <p>cruel</p>
  <p>World</p>
  <button type="button">wrap/unwrap</button>
  <p id="hint">Click to wrap paragraphs in a div, then unwrap them again.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var pTags = $("p").not("#hint");
    $("button").on("click", function() {
      if (pTags.parent().is("div")) {
        pTags.unwrap();
        $("#hint").text("Unwrapped — div removed, paragraphs promoted.");
      } else {
        pTags.wrap("<div>");
        $("#hint").text("Wrapped — paragraphs inside a div with blue border.");
      }
    });
  </script>
</body>
</html>

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jQuery .unwrap() — official wrap/unwrap toggle (Try It)