JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<div class="text notify">Flash</div>
<div class="text notify">Flash</div>
<div class="text">Don't Flash</div>

CSS

.flash {
	color: #DC4900;
}

JavaScript

$( document ).ready(function() {
	$('.text').each(function(){
		if($(this).hasClass('notify')) {
			setInterval(function() {
			   $(this).toggleClass('flash');
			}, 1000);
		}
	});
});