JSFiddle - React, Tailwind, and code Playground

HTML

<input id="foo" name="foo" type="text" value="" size="55" />

JavaScript

jQuery(document).ready(function() {
    var foo = jQuery('#foo');
  
    function updateTime() {
        var now = new Date();
        foo.val(now.toString());        
    }
  
    updateTime();
    setInterval(updateTime, 5000); // 5 * 1000 miliseconds
});