Posted by Andrew Garrett, Software Engineer, Classroom API and Michael Stillwell, Developer Advocate, Google Apps
The following callbacks are supported:
What can you use this for? There's a bunch of different things you can do, but to get you started, here are some suggestions:
Finally, if you want to fully control the appearance and behavior of the share button (and don't need the callbacks), you can customize the Classroom icon (as long as it still meets our branding guidelines) and initiate the share via a URL of the form:
As ever, please continue asking questions (or answering them!) on StackOverflow (use the google-classroom tag) and report bugs and feature requests via the Classroom API bug tracker.