jQuery removeClass从按钮

Question

I need to remove "disabled" class from button when there is at least one char in the input. This is jQuery code:

$('.reply').on('change', function() {
    if ($(this).val().length > 0) {
        $(".replyBtn").removeClass('disabled');
    }
});

This is HTML:

<input type="text" name="reply" class="reply form-control" placeholder="Rašykite atsakymą...">
<br>
<button type="submit" class="replyBtn btn btn-success disabled">Atsakyti</button>

But it's not working and I don't get errors in console

Answer 1

 $('.reply').on('input', function() { if ($(this).val().length > 0) { $(".replyBtn").removeClass('disabled'); } else { $(".replyBtn").addClass('disabled'); } }); 

 .disabled { color: red } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input type="text" name="reply" class="reply form-control" placeholder="Rašykite atsakymą..."> <br> <button type="submit" class="replyBtn btn btn-success disabled">Atsakyti</button> 

Use input