JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<!DOCTYPE html>
<html>
<head>
	<title>CORS TEST</title>
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">

</head>
<style type="text/css">
	<style type="text/css">
   .dropdown:hover >.dropdown-menu{
  display: block;
}
.header{
  height: 60px;
  background-color: grey;
}
#logo{
  color :#999;
  font-weight:bolder;
  font-size: 30px;
  letter-spacing: 3px;
  font-size: 25px;
}

   </style>
</style>
<body>
<header class="header">

<div class="navbar navbar-inverse navbar-fixed-top" >
  <div class="container-fluid">
    <div class="navbar-header" >
      <button type="button" class= "navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse" >
        <span class="icon-bar" ></span>
        <span class="icon-bar" ></span>
        <span class="icon-bar" ></span>
      </button>
      <div id="logo" class="wow pulse"><a  style="color: white" href="index.php">КОМПЛЕКСНЫЕ СИСТЕМЫ БЕЗОПАСНОСТИ</a></div>
    </div>
    
    <div class="navbar-collapse collapse " id="responsine-menu" >
      <ul class="nav navbar-nav navbar-right" >
        <li class="dropdown" >
          <a  href="services.php" class="dropdown-toggle"...