JSFiddle - React, Tailwind, and code Playground

by Alex Huber

HTML

<div class='UserSectionHead'></div>
<div class='UserSectionHead'></div>
<div class='UserSectionHead'></div>

JavaScript

if(!document.getElementsByClassName) {
    document.getElementsByClassName = function(className) {
        return this.querySelectorAll("." + className);
    };
    Element.prototype.getElementsByClassName = document.getElementsByClassName;
};

var elements = document.getElementsByClassName('UserSectionHead');
for (var i = 0; i < elements.length; i++) 
{
    elements[i].innerHTML += "-foo-";
}