HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>dblclick delegation</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    ul { list-style: none; padding: 0; }
    li { padding: 10px 14px; margin: 4px 0; background: #e0e7ff; border-radius: 6px; cursor: pointer; user-select: none; }
    li.selected { background: #bfdbfe; border: 2px solid #2563eb; }
    li.editing { background: #fef9c3; border: 2px solid #ca8a04; }
    button { margin-top: 10px; padding: 8px 14px; cursor: pointer; }
    #out { margin-top: 12px; color: #4338ca; font-weight: bold; }
  </style>
</head>
<body>
  <ul id="list">
    <li>Report.pdf</li>
    <li>Budget.xlsx</li>
    <li>Notes.txt</li>
  </ul>
  <button type="button" id="add">Add file</button>
  <div id="out">Single-click to select (300ms delay). Double-click to edit.</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var clickTimer = null;
    var n = 4;

    $("#list").on("click", "li", function() {
      var el = this;
      clearTimeout(clickTimer);
      clickTimer = setTimeout(function() {
        $(el).addClass("selected").removeClass("editing").siblings().removeClass("selected editing");
        $("#out").text("Selected: " + $(el).text());
      }, 300);
    });

    $("#list").on("dblclick", "li", function() {
      clearTimeout(clickTimer);
      $(this).addClass("editing").removeClass("selected").siblings().removeClass("selected editing");
      $("#out").text("Edit mode: " + $(this).text());
    });

    $("#add").on("click", function() {
      $("#list").append("<li>File" + n++ + ".doc</li>");
    });
  </script>
</body>
</html>

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jQuery dblclick event — delegation with click delay (Try It)