Dblclick listener firing only once in my code

Question

I am new to Javascript and I developed following code which works only once.

function display(arr) {
  $(".tbl tbody").empty();
  for (i = 0; i < arr.length; i++) {
    $(".tbl tbody").append('<tr class="tblrow" id = "'+i+'"> <td><input id="editInput" type="text"/>'+arr[i].Empid+'</td><td>'+arr[i].name+'</td><td>'
					+arr[i].pd+'</td><td>'+arr[i].unplannedleaves+'</td><td>'+arr[i].response_time+'</td><td class = "tt"><button class="delbtn" id ="btn'+i+'">Delete</button></td></tr>');

    $("td").css("text-align", "center");
    $("td").css("border", "1px solid black");
    $(".tt").css("border", "none");
    $(".tbl").css("border", "none");
    $(".delbtn").css("display", "none");
  }
}

$("tr").on('dblclick', function() {
  var s = this.id;
  $("#btn" + s).css("display", "block");
});

$(".delbtn").click(function() {
  var s = this.id;
  var k = s.slice(3);
  arr.splice(k, 1);
  display(arr);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="addelem">
  <table class="tbl1">
    <tr>
      <td>
        <input id="empid" type="text" placeholder="EmpId">
      </td>
      <td>
        <input id="name" type="text" placeholder="Name">
      </td>
      <td>
        <input id="pd" type="number" placeholder="Pds Delivered">
      </td>
      <td>
        <input id="unp" type="number" placeholder="Unplanned leaves">
      </td>
      <td>
        <input id="rsp" type="number" placeholder="Response Time">
      </td>
    </tr>
  </table>

  <button id="submit">Submit</button>
  <button id="cancel">Cancel</button>

</div>

After my table gets displayed usingdisplay method. The first time I dblclick a row it works as expected and displays the delete button. I click delete the row gets deleted and the table is re-rendered. However, after this the row is no more dbl-clickable. I tried debugging but the control won't even go in the dblclick listener.

Can someone explain why is it so. Whats going wrong in here?

Answer 1

Bind your tr element like this:

$(document).on('dblclick', "tr", function() {
  var s = this.id;
  $("#btn" + s).css("display", "block");
});

It will dynamically subscribe any new tr with your dblclick event