jquery disable each button

Question

i have a table with text area and button and i want button disabled when text area is empty and enabled when not empty or user fill that text area

this is my sample html code i use php looping for generate this table

<table>
<tr>
<td><textarea name="text1" id="text1"></textarea></td>
<td><input type="button" class="btn btn-primary" id="btn1"></td>
</tr>
<tr>
<td><textarea name="text2" id="text2"></textarea></td>
<td><input type="button" class="btn btn-primary" id="btn2"></td>
</tr>
<tr>
<td><textarea name="text3" id="text3"></textarea></td>
<td><input type="button" class="btn btn-primary" id="btn3"></td>
</tr>
</table>

for disabling button i wanna use addclass "disabled" and romoveclass "enabeled" and for enabeling use addclass "enabeled" and removeclass "disabled"

please help me with jquery. thx before

Answer 1

You can do something like this:

 $('textarea').on('keyup keydown keypress change paste', function() { if ($(this).val() === '') { $(this).closest('tr').find('.btn').removeClass('enabled').addClass('disabled') } else { $(this).closest('tr').find('.btn').removeClass('disabled').addClass('enabled') } }); 

 .disabled { color: red; } .enabled { color: green; } 

 You can do something like this: <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <table> <tr> <td><textarea name="text1" id="text1"></textarea></td> <td><input type="button" class="btn btn-primary disabled" id="btn1" value="Submit"></td> </tr> <tr> <td><textarea name="text2" id="text2"></textarea></td> <td><input type="button" class="btn btn-primary disabled" id="btn2" value="Submit"></td> </tr> <tr> <td><textarea name="text3" id="text3"></textarea></td> <td><input type="button" class="btn btn-primary disabled" id="btn3" value="Submit"></td> </tr> </table>