Niko_Public/static/JS/main.js

$(document).ready(function () {
    $.getJSON('/checkIn/AJAX/checkInList', function (data, status) {
        console.log('data is' + data);
        console.log('status is' + status);
        var x;
        for (x in data) {
            $("#existingList").append(data[x].description);
        }
    });