Detect html table cell value change

Question

How am I able to detect change in html table on any cell? Currently I can only detect change in one cell, I could repeat the same code for all table cell ID but wondering if there is an efficient way.

Note that I have other inputs in my form and only wish to detect ones relevant to the table below:

Code:

html:

<table id="myTable" border="1" data-mini="true" >
<tbody>
<tr>
<th>Drawing Number</th>
<th>Description</th>
<th>Sheet Number</th>
<th>Issue</th>
</tr>
<tr>
<td><input name="drawing-n-1" id="drawing-n-1" type="text" /></td>
<td><input name="drawing-d-1" type="text" /></td>
<td><input name="drawing-s-1" type="text" /></td>
<td><input name="drawing-i-1" type="text" /></td>
<td><input name="drawing-n-2" id="drawing-n-2" type="text" /></td>
<td><input name="drawing-d-2" type="text" /></td>
<td><input name="drawing-s-2" type="text" /></td>
<td><input name="drawing-i-2" type="text" /></td>
</tr>
</tbody>
</table>

javascript:

var drawing_input = 'drawing-n-1';
$('#'+drawing_input).change(function(e) {
    alert("aha");
    var data = $('#'+drawing_input).val();
});

Answer 1

With jQuery you needn't be so specific. Just change the selector to listen for all <input> s.

$('input').on('change',

This selector will pick every <input> on the page.

Or if you need to isolate the table's inputs, add the table's id in the selector.

$('#xTable input').on('change'...

This selector will pick every <input> within the table.

Saw that you needed only to listen for inputs with ids. If so then you can use the brackets and ^= :

$("#xTable input[id^='drawing-n-']").on('change'....

This means get any <input> that has an [ id that starts ^= with "drawing-n-" ] which is in a <table> with the id of xTable .

That selector will pick only input#drawing-n-1 and input#drawing-n-2

Demo

 $("#xTable input[id^='drawing-n-']").on('change', function(e) { var data = $(this).val(); console.log(data); }); 

 <table id="xTable" border="1" data-mini="true"> <tbody> <tr> <th>Drawing Number</th> <th>Description</th> <th>Sheet Number</th> <th>Issue</th> </tr> <tr> <td><input name="drawing-n-1" id="drawing-n-1" type="text" /></td> <td><input name="drawing-d-1" type="text" /></td> <td><input name="drawing-s-1" type="text" /></td> <td><input name="drawing-i-1" type="text" /></td> <td><input name="drawing-n-2" id="drawing-n-2" type="text" /></td> <td><input name="drawing-d-2" type="text" /></td> <td><input name="drawing-s-2" type="text" /></td> <td><input name="drawing-i-2" type="text" /></td> </tr> </tbody> </table> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 

Answer 2

event delegation

$("tbody").on("change", "input", function () {
    console.log(this.name, this.value)
});