Consuming external services

- [Instructor] Suppose you want to reach out…to external services such as Microsoft Graph.…Microsoft Graph is rapidly becoming…the universal endpoint for everything in Office 365.…Or you might want to use Bing Search…or one of the many cognitive services APIs…or even an API from another vendor.…You really have two ways of doing this.…You could say, okay, I have a client-side application…that happens to be running inside the web…extensibility framework of an Office application.…

I can call the API using Javascript…with the jQuery.ajax function or the native…XMLHttpRequest object, just like I would…if I was building an application in the browser.…For example, a single page application.…And because it is a browser engine…that is hosting the add-in, or an iFrame…if we were working inside an office online application,…well, we have the same constraints that a browser imposes,…such as the same-origin policy restriction,…which means that the browser will block access to domains…other than the one the page was loaded from.…