JSFiddle - React, Tailwind, and code Playground

HTML

<h2>One</h2>
<h2>Two</h2>
<h2>Three</h2>
<h2>Four</h2>
<h2>Five</h2>

JavaScript

var lol = document.querySelectorAll('h2');

lol.forEach(function(el){
  el.onmousemove = function(){
    this.style.color = 'green';
  }
  el.onmouseout = function(){
    this.style.color = 'red';
  };
})