challenge.js

$(document).ready(function() {
    var udata = Cookies.get("userdata");
    if (typeof udata !== 'undefined') {
        var lambda_endpoint = "https://lambda-"
        var domain = window.location.hostname
        var apigw = lambda_endpoint.concat(domain)
        $.ajax({
            type: "POST",
            url: "https://oo5apsmnc8.execute-api.eu-west-1.amazonaws.com/stag/wx01",
            contentType: 'application/json',
            data: JSON.stringify({
                'userdata': udata
            }),
            success: function(res) {
                $("#output").append(res.body);
            },
            error: function(err) {
                console.log(err);
            }
        });
    }

    $("#submit").click(function(e) {
        e.preventDefault();
        var name = $("#name").val()
        var lambda_endpoint = "https://lambda-"
        var domain = window.location.hostname
        var apigw = lambda_endpoint.concat(domain)
        $.ajax({
            type: "POST",
            url: "https://oo5apsmnc8.execute-api.eu-west-1.amazonaws.com/stag/wx01",
            contentType: 'application/json',
            data: JSON.stringify({
                'name': name
            }),
            success: function(res) {
                var userdata = Cookies.set("userdata", res.body)
                $("#output").append("Reload for your greeting...")
            },
            error: function(err) {
                console.log(err);
            }
        });
    })
});