bluesFish

What is the purpose of this line, is it simply creating a namespace and why logical OR operators? var Contoso = window.Contoso || {} ------------------------------------------------------------------------------------------------- "use strict"; var Contoso = window.Contoso || {} Contoso.SiteCollection = function() { var siteCollection, context, getSiteCollectionURL = function() { var context = new SP.ClientContext.get_current(); var siteCollection = context.get_site(); context.load(siteCollection); context.executeQueryAsync(onSuccess, onFailure); }, onSuccess = function () { alert("Site Collection URL: " + siteCollection.get_url()); }, function onFailure() { alert("Could not load the site collection"); }