jQuery disable/enable submit button

Question

I have this html:

<input type="text" name="textField" />
<input type="submit" value="send" />

How can I do something like this:

• When the text field is empty the submit should be disabled (disabled="disabled").
• When something is typed in the text field to remove the disabled attribute.
• If the text field becomes empty again(the text is deleted) the submit button should be disabled again.

I tried something like this:

$(document).ready(function(){
    $('input[type="submit"]').attr('disabled','disabled');
    $('input[type="text"]').change(function(){
        if($(this).val != ''){
            $('input[type="submit"]').removeAttr('disabled');
        }
    });
});

... but it doesn't work. Any ideas? Thanks.

Answer 1

I had to work a bit to make this fit my use case.

I have a form where all fields must have a value before submitting.

Here's what I did:

  $(document).ready(function() {
       $('#form_id button[type="submit"]').prop('disabled', true);

       $('#form_id input, #form_id select').keyup(function() {
          var disable = false;

          $('#form_id input, #form_id select').each(function() {
            if($(this).val() == '') { disable = true };
          });

          $('#form_id button[type="submit"]').prop('disabled', disable);
       });
  });

Thanks to everyone for their answers here.

Answer 2

Please see the below code to enable or disable Submit button

If Name and City fields has value then only Submit button will be enabled.

<script>
  $(document).ready(function() {
    $(':input[type="submit"]').prop('disabled', true);

    $('#Name').keyup(function() {
      ToggleButton();
    });
    $('#City').keyup(function() {
      ToggleButton();
    });

  });

function ToggleButton() {
  if (($('#Name').val() != '') && ($('#City').val() != '')) {
    $(':input[type="submit"]').prop('disabled', false);
    return true;
  } else {
    $(':input[type="submit"]').prop('disabled', true);
    return false;
  }
} </script>

<form method="post">

  <div class="row">
    <div class="col-md-4">
      <h2>Getting started</h2>
      <fieldset>
        <label class="control-label text-danger">Name</label>
        <input type="text" id="Name" name="Name" class="form-control" />
        <label class="control-label">Address</label>
        <input type="text" id="Address" name="Address" class="form-control" />
        <label class="control-label text-danger">City</label>
        <input type="text" id="City" name="City" class="form-control" />
        <label class="control-label">Pin</label>
        <input type="text" id="Pin" name="Pin" class="form-control" />
        <input type="submit" value="send" class="btn btn-success" />
      </fieldset>
    </div>
  </div>
</form>

Answer 3

Here's the solution for file input field.

To disable a submit button for file field when a file is not chosen, then enable after the user chooses a file to upload:

$(document).ready(function(){
    $("#submitButtonId").attr("disabled", "disabled");
    $("#fileFieldId").change(function(){
        $("#submitButtonId").removeAttr("disabled");
    });
});

Html:

<%= form_tag your_method_path, :multipart => true do %><%= file_field_tag :file, :accept => "text/csv", :id => "fileFieldId" %><%= submit_tag "Upload", :id => "submitButtonId" %><% end %>

Answer 4

It will work like this:

$('input[type="email"]').keyup(function() {
    if ($(this).val() != '') {
        $(':button[type="submit"]').prop('disabled', false);
    } else {
        $(':button[type="submit"]').prop('disabled', true);
    }
});

Make sure there is an 'disabled' attribute in your HTML

Answer 5

The answers above don't address also checking for menu based cut/paste events. Below's the code that I use to do both. Note the action actually happens with a timeout because the cut and past events actually fire before the change happened, so timeout gives a little time for that to happen.

$( ".your-input-item" ).bind('keyup cut paste',function() {
    var ctl = $(this);
    setTimeout(function() {
        $('.your-submit-button').prop( 'disabled', $(ctl).val() == '');
    }, 100);
});

Answer 6

Al types of solution are supplied. So I want to try for a different solution. Simply it will be more easy if you add a id attribute in your input fields.

<input type="text" name="textField" id="textField"/>
<input type="submit" value="send" id="submitYesNo"/>

Now here is your jQuery

$("#textField").change(function(){
  if($("#textField").val()=="")
    $("#submitYesNo").prop('disabled', true)
  else
    $("#submitYesNo").prop('disabled', false)
});