JSFiddle - React, Tailwind, and code Playground

HTML

<script type="text/javascript">
            var int=self.setInterval("clock()",1000);
            function clock()
            {
            var d=new Date();
            var t=d.toLocaleTimeString();
            document.getElementById("clock").innerHTML=t;
            }
</script>

<b id="clock"></b>