JSFiddle - React, Tailwind, and code Playground

HTML

<div class="g-ytsubscribe" data-channel="Affogalagoffa" data-layout="default" data-count="hidden" data-onytevent="onYtEvent"></div>

JavaScript

$.getScript("https://apis.google.com/js/platform.js", function(){
  function onYtEvent(payload) {
    if (payload.eventType == 'subscribe') {
	  alert('YT event: ' + payload);
    }
  }
});