More informative error messages

[liamzebedee]

Hey guys, thanks so much for maintaining this library! Filing this as a note (who knows I'll probably implement it later).

Just did a code refactor so that it's in different ES6 modules. Used the wrong import syntax, so one of my components was undefined. Got an unhelpful error message like so:

Would help to know that the component property was undefined.

[davidLeonardi]

I personally don't think that this is a Router issue, it's navigator that's failing on you, not router.

[liamzebedee]

Sorry there @SEthX - just picked up on that!