state.php

См. документацию.

<?php
 
namespace Bitrix\UI\Buttons;
 
abstract class State
{
    const HOVER    = "ui-btn-hover";
    const ACTIVE   = "ui-btn-active";
    const DISABLED = "ui-btn-disabled";
    const CLOCKING = "ui-btn-clock";
    const WAITING  = "ui-btn-wait";
}