JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" onclick="return runAjax();"> Reservation Check </a>

<div id="responseData">
Waiting for Action...
</div>

CSS

#responseData {
  margin-top: 15px;
  font-family: "Arial"
}

JavaScript

// handles the click event, sends the query
function runAjax() {
    $("#responseData").html("Collecting your Data...");
    $.ajax({
          url: "https://tiffintom.com/api/private/request/data",
          type: "POST",
          dataType: "json",
          data: {
                "RESTAURANT":{"APIKEY":"DoPUQBErcpKPtRmbjpcFvbb8YCMeBjr4w6OcyjtA"},
                "REQUESTPARAM":[
                    {
                        "MODULE":"postitem",
                        "METHOD":"reservation",
                        "PARAMS":{
                            "CUSTOMER_EMAIL":"[email protected]",
                            "CUSTOMER_NAME":"Tariqul Islam",
                            "CUSTOMER_TELEPHONE":"01911291718",
                            "RESERVATION_DATE":"2017-06-30",
                            "RESERVATION_TIME":"5:45 PM",
                            "RESERVATION_DURATION_HOUR":"4",
                            "RESERVATION_DURATION_MINUTE":"0",
                            "ADULT":"12",
                            "CHILDREN":"6",
                            "INFANTS":"3",
                            "MESSAGE":"New Reservation using API",
                            "REGID": "YOUR_FIREBASE_REGISTRATION_ID"
                        }
                    }
                ]
            },
            success:function(data) {
                console.log(data);
                $("#responseData").html(JSON.stringify(data));
            },
            error: function () {
                $('#responseData').html('There was an error!');
            }
    });
    
    return false;
}