JSFiddle - React, Tailwind, and code Playground

by Jacob Gray

HTML

<div class="block-title">
  <strong><span>Refine By</span></strong>
</div>

JavaScript

var span = document.querySelector(".block-title span");
alert(span);
    function bm {
      span.innerHTML += " BATMAN";
    }
    span.attachEvent('onclick', bm);
    span.addEventListener('click', bm, false);