JSFiddle - React, Tailwind, and code Playground

HTML

<p>I am <span>Something</span><span class="hidden">Test22222</span>
</p>

CSS

.hidden {
    display:none;
}
span {
    position: absolute;
    left:45px;
    top:10px;
}
p {
    width:200px;
    border:1px solid #000;
    padding:10px;
    position:relative;
}

JavaScript

$(document).ready(function() {

		// run the fade() function every 2 seconds
		setInterval(function(){
			fade();
		},2000);


		// toggle between fadeIn and fadeOut with 0.3s fade duration.
		function fade(){
			$("span").fadeToggle(300);
		}

	});