JSFiddle - React, Tailwind, and code Playground

HTML

<h4>RESPONSE</h4>
<div id="containerText"></div>

JavaScript

// AJAX WRAPPER
MYPROJECT = {};
MYPROJECT.Ajax = (function() {
    return{
   
        // get data by AJAX call and return as plain text
        get:function(url, callback) {
            new Ajax.Request(url, {
                method: 'get',
                onSuccess: function(transport) {
                    var data = transport.responseText.evalJSON();
                    callback(data);
                }
            });
        }
    }    
})();
    
// USAGE  
MYPROJECT.Ajax.get('/ajax_json_echo/?foo=bar',function(data){
        
    alert(data);
    $('containerText').innerHTML = data.get_response.foo
});