JSFiddle - React, Tailwind, and code Playground

HTML

<h1 id="theH1">Test</h1>

JavaScript

$(document).ready(function() {
    var pathname = window.location.pathname;
    if($(pathname +"*.us") || $(pathname +"*.com") || $(pathname +"*.ca"))
    {
      $("#theH1").text("United States");
    }
});