JSFiddle - React, Tailwind, and code Playground

HTML

<section id="mySection"> 
   <form name="form_clock"> 
     <input type="text" name="clock_txt" size="10" id="clock_txt"> 
   </form>
</section>

JavaScript

$("#mySection").ready(function new_clock() { 
		clock = new Date() ;
		hour =   clock.getHours(); 
		minutes = clock.getMinutes() ;
		seconds = clock.getSeconds() ;
		print_clock= hour + " : " + minutes + " : " + seconds;
		$("#clock_txt").val(print_clock);
  	setInterval(new_clock, 1000);
});