JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-2.2.0.min.js"></script>

JavaScript

$(function(){
   var interval = 1;
   
   function ajaxCall(){
   		console.log('ajax called');
      //เขียนโค๊ด jquery ajax ตรงนี้
   }
   
   ajaxCall();
   setInterval(function(){
   		ajaxCall();
   },5000);
});