JSFiddle - React, Tailwind, and code Playground

HTML

<script>
	//setting initial state so that function will only work once
	var visitors_loaded=false;	
	var my_callback = function( data ) {
		if (visitors_loaded) return 0;
		if (data) {	
    		//success: callback function is called and it has a proper data
        visitors_loaded=true;
        alert(JSON.stringify(data));
		}
   	 	else alert ('error'); //something went wrong
	};
</script>
<script onload="my_callback(null)" onerror="my_callback(null)" src="https://api.clicky.com/api/stats/4?site_id=32020&sitekey=9a19b1a4d1171193&type=visitors&date=this-month&output=json&json_callback=my_callback"></script>