I've tried everything!
$('#m-button').button('disabled')
$('#m-button').attr('disabled', 'disabled')
$('#m-button').prop('disabled', 'disabled')
$('#m-button').attr('disabled', 'true')
$('#m-button').prop('disabled', 'true')
$('#m-button').attr('enabled', 'false')
<button id="m-button" class="btn" type="button" >Add Note</button>
It stays enabled though. What's the proper way to disable a <button>?