Jquery Remove disabled attribut from submit form.

Jquery Remove disabled attribut from submit form.

//Jquery Remove disabled attribut from submit form. validate form without jquery validation.
<form>
<input type="text" class="form_field">
<input type="text" class="form_field">
<input type="email" class="form_field">
<input type="submit" class="sendButton">
</form>

<script>
   $('.sendButton').prop('disabled', true);
   
   $('.form_field').on('change keyup', function () {
     $('.form_field').each(function () {
        if ($(this).val() == '') {
            $('.sendButton').prop('disabled', true);
            return false;
        }else {
            $('.sendButton').prop('disabled', false);
        }
    });         
  });
</script>