Access CRM web API from javascript using CORS

Similar to the following url, which explains how to access office 365 api's:

https://msdn.microsoft.com/en-us/office/office365/howto/create-web-apps-using-CORS-to-access-files-in-Office-365

Is this approach also applicable to CRM Online? Will it be applicable in the (near) future?

If not, what would be the best approach for a Single Page App to consume the OData endpoint, using Azure AD for authentication?

(I've tried a couple things, but am now stuck on retrieving the data from the service. This only works whenever i change the browser security for accessing data sources across domains)

Many thanks in advance...