JSFiddle - React, Tailwind, and code Playground

HTML

<div class="content">
</div>

JavaScript

function myEventHandler(e) {
  $('.content').html("Hello there");
}

$(function() {
  var myEvent = new CustomEvent("myEventName");
  document.addEventListener("myEventName", myEventHandler, false);
  document.dispatchEvent(myEvent);
});