JSFiddle - React, Tailwind, and code Playground

HTML

<html data-highcontrast-applied="true">
<head>

</head>
<body>
  <div class="row-centered">
    <p>
    Helllllllooooooooooo
    </p>
  </div>
</body>
</html>

JavaScript

$(document ).ready(function() {
		var temp = document.getElementsByTagName("html")[0].getAttribute("data-highcontrast-applied");
    console.log("temp==", temp);
		if(temp === 'true')
		{
			$(".row-centered").css({"background-color": "red"});
		}
	
	});