You can also filter events with filter().
But don't just use filter(e => e is NavigationEnd)
A much better solution is to add a 'type guard' to filter() like this:
filter((e): e is NavigationEnd => e instanceof NavigationEnd), It contains two things:
e is NavigationEndthis is the assertion you're defining a function for (this is typescript syntax and is completely stripped out of the transpiled javascript)e instanceof NavigationEndthis is the actual runtime code that checks the type
The nice thing with this is that operators further down 'the pipe', like map below now know the type is NavigationEnd, but without the type-guard you'd have a type Event.
If you only need to check for one event type then this is the cleanest way to do so. This also appears to be necessary in strict mode to avoid compiler errors.
