delete and reset html table row ids for the rest of the table

Question

how to reset the html table row id and name after deleting the row using jquery. For example html table has 5 rows and If I delete the 3rd row, then actual 4th and 5th row textbox id should become 3 and 4

<script type="text/javascript">
$("#add").on("click",function() {
var data ='<tr><td>2</td><td><input type="text" id="name2" value=""/></td><td><input type="text" id="phone2" value=""/></td><td><input type="text" id="email2" value=""/></td><td><button id="delete">Delete</button></td></tr>';
$("tbody").append(data);
});
</script>
<button id="add">Add Row</button>
<table>
<tbody>
<tr>
<td>1</td>
<td><input type="text" id="name1" value=""/></td>
<td><input type="text" id="phone1" value=""/></td>
<td><input type="text" id="email1" value=""/></td>
<td><button id="delete">Delete</button></td>
</tr>
</tbody>
</table>

Answer 1

So first you must declare a global counter for that window.globalCounter = 2; where you'll store the rows counter. (what index will have the added row)

Then when you add you increment that window.globalCounter++.

And when you delete, you must fetch the currentRow, decrement the counter, and refactor the indexes.

  $("tbody").on("click", "#delete", function (ev) {

        // delete row
        var $currentTableRow = $(ev.currentTarget).parents('tr')[0];
        $currentTableRow.remove();
        window.globalCounter--;

        // refactor indexes
        $('table').find('tr').each(function (index) {
            var firstTDDomEl = $(this).find('td')[0];
            var $firstTDJQObject = $(firstTDDomEl);
            $firstTDJQObject.text(index + 1);
        });

    });

Here is a working code snippet.

window.globalCounter = 2;

$(document).ready(function () {
    $("#add").on("click", function () {
        var data = '<tr><td>' + window.globalCounter + '</td><td><input type="text" id="name2" value=""/></td><td><input type="text" id="phone2" value=""/></td><td><input type="text" id="email2" value=""/></td><td><button id="delete">Delete</button></td></tr>';
        $("tbody").append(data);
        window.globalCounter++;
    });

    $("tbody").on("click", "#delete", function (ev) {
        var $currentTableRow = $(ev.currentTarget).parents('tr')[0];
        $currentTableRow.remove();
        window.globalCounter--;
        
        $('table').find('tr').each(function (index) {
            var firstTDDomEl = $(this).find('td')[0];
            var $firstTDJQObject = $(firstTDDomEl);
            $firstTDJQObject.text(index + 1);
        });
    });


});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<button id="add">Add Row</button>
<table>
    <tbody>
        <tr>
            <td>1</td>
            <td>
                <input type="text" id="name1" value="" />
            </td>
            <td>
                <input type="text" id="phone1" value="" />
            </td>
            <td>
                <input type="text" id="email1" value="" />
            </td>
            <td>
                <button id="delete">Delete</button>
            </td>
        </tr>
    </tbody>
</table>

Here you have an alternative working jsfiddle: https://jsfiddle.net/cn5p4oke/

Of course you must adjust the phone2, email2, name2 ids.

Please note that i used jQuery 2.1.0.

Answer 2

<script>
    var row = $(document.getElementById(id));  //Or continue to use the invalid ID selector:  '#'+id
    var siblings = row.siblings();
    row.remove();
    siblings.each(function(index) {
         $(this).children('td').first().text(index + 1);
    });
</script>