Every bit of documentation you need is in the Angular source code:
Angular methods are very well documented. For example, if (like the comment) you wanted to view the docs for ng-switch. You can go to:
src->directives->ngSwitch.js
That's give you all the documentation, usage examples and more plus the relevant source code which is worth reading.
You can also go to /docs/ for the actual documentation but it's not as nice imo :)