JSFiddle - React, Tailwind, and code Playground
HTML
<div id="js-item-notifymebtn-$item.itemid">
<div id="notifyComment">test</div>
</div>
JavaScript
$("[id^=js-item-notifymebtn]").removeAttr("id");
<div id="js-item-notifymebtn-$item.itemid">
<div id="notifyComment">test</div>
</div>
$("[id^=js-item-notifymebtn]").removeAttr("id");