SharePoint 2013: Use the cross-domain library in a tenant-scoped app (JSOM)

You will find code sample for cross-domain library in a tenant-scope app based on REST call on Microsoft site but not based on JSOM. I am not very much comfortable in REST calls so i decided to created similar example in JSOM.

Download sample code from here and just replace JavaScript in CrossDomainExec.js with below script

var web;

var hostweburl;

var appweburl;

function execCrossDomainRequest() {

    hostweburl =

         decodeURIComponent(

             getQueryStringParameter('SPHostUrl')

     );

    appweburl =

        decodeURIComponent(

            getQueryStringParameter('SPAppWebUrl')

     );

    var scriptbase = hostweburl + '/_layouts/15/';

    $.getScript(scriptbase + 'SP.Runtime.js',

        function () {

            $.getScript(scriptbase + 'SP.js',

                function () { $.getScript(scriptbase + 'SP.RequestExecutor.js', GetWebInfo); }

            );

        }

    );

}

function getQueryStringParameter(param) {

    var params = document.URL.split("?")[1].split("&");

    var strParams = "";

    for (var i = 0; i < params.length; i = i + 1) {

        var singleParam = params[i].split("=");

        if (singleParam[0] == param) {

            return singleParam[1];

        }

    }

}

function GetWebInfo() {

    var context;

    var factory;

    var appContextSite;

   

    context = new SP.ClientContext(appweburl);

    factory = new SP.ProxyWebRequestExecutorFactory(appweburl);

    context.set_webRequestExecutorFactory(factory);

    //appContextSite = new SP.AppContextSite(context, hostweburl);

    appContextSite = new SP.AppContextSite(context, document.getElementById("sitecoll1").value);//host url replaced by site collection url

    var web = appContextSite.get_web();

    context.load(web);

    context.executeQueryAsync(

        successHandler, errorHandler

    );

    function successHandler() {

        var oli = document.createElement("li");

        oli.innerText = web.get_title() + " (" + web.get_url() + ")";

        document.getElementById("WebTitles").appendChild(oli);

    }

    function errorHandler(sender, args) {

        document.getElementById("WebTitles").innerText = "Could not complete cross-domain call: " + args.get_message();

    }

}