JSFiddle - React, Tailwind, and code Playground

JavaScript

$(document).ready(function(){
  my_func = function(){
    $.ajax({
            type: 'POST',
            url: '/echo/json/',
            dataType: 'json',
            success: function(data){
                window.setTimeout('my_func()', 20000);
            },
            error: function() {
                window.setTimeout('my_func()', 1000);
            }
    });
  };
  window.setTimeout('my_func()', 20000);
});