JSFiddle - React, Tailwind, and code Playground

JavaScript

var mystrings = ["helloThere", "HelloThere", "ILoveTheUSA", "iLoveTheUSA"];


for(var i = 0; i< 4; i++)
{
    jQuery(document.body).append(mystrings[i]
         .replace(/([A-Z]+)/g, " $1").replace(/([A-Z][a-z])/g, " $1")
    );
    jQuery(document.body).append("<br />");
}