JSFiddle - React, Tailwind, and code Playground
HTML
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<span id="test1">test1</span>
</body>
</html>JavaScript
$(function(){
$("#test1").addClass("disabled disabled");
alert("test1 class after addClass ='"+$("#test1").attr("class")+"'");
$("#test1").removeClass("disabled");
alert("test1 class after removeClass ='"+$("#test1").attr("class")+"'");
});