callback.js

function display_obj(obj, category) {
    var url = "/" + category + "/" + obj.val();
    
    return new Promise(function(resolve, reject) {
        $.get(url, function(resp) {
            var rows = "";
            for (var key in resp) {
                console.log("Generating pairs[" + key + "]: " + resp[key]);
                rows += generate_row(key, resp[key]);
            }
            $("#form").empty();
            $("#form").html(rows);
            $("#message").empty();
            resolve(resp);
        }); 
    });
}