我想在提交后立即禁用“提交按鈕”。這是我寫(xiě)的，但它不起作用。你能告訴我問(wèn)題是什么嗎？<div>    <form id="manual_form" action="" method="POST">        <button id="button" type="submit" name="manual_start">SUBMIT！</button>    </form></div><hr><script type="text/javascript">    let manual_form = document.getElementById('manual_form');    let manual_button = document.getElementById('button');    manual_form.addEventListener('submit', (evt) => {        console.log('submitted!');        manual_button.disabled = true;    }, false);</script>