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

$('.text.notify').each(function() {
  var self = this;

  setInterval(function() {
    $(self).toggleClass('flash');
  }, 1000);
});