takamori

Provide or update website w/ documentation that is current for what is currently documented.

5

The website is out of date compared to the checked-in code. Example: Observable.subscribe isn't documented yet, even tho there is some jsdoc in the code if one digs through enough....

Document Subject (e.g. next() is undocumented)

6

No jsdoc exists in the code for next or most other methods on Subject. Filing a new bug, as requested in https://github.com/ReactiveX/rxjs/issues/2656#issuecomment-345958269

Use of custom TrackByFunction in MatTree does not preserve expansion state when nodes change

8

#### What is the expected behavior? Use of trackBy should also ensure that the expansion state does not get lost when nodes are updated. #### What is the current behavior?...