EP 10.2 - Angular / Dependency Injection & Providers / Injectors

We configure injectors with providers.

We pass to injectors a token and then resolve this into a dependancy.

Injectors cache dependancies, so multiple calls result in the same instance being returned.

Different injectors hold different caches, so resolving the same token from a different injector will return a different instance.

We create child injectors from parent injectors.

A child injector will forward a request to their parent if it can’t resolve the token itself.

So far we’ve only covered providers that provide classes providers can provide other types of dependencies which is the topic of the next lecture.

[marcossalvo]

Amazing! Finally I start understading how this works!

[Gogolian]

Wow! Thank you for explaining it so clearly. Great work!

[programmingpracticals]

What if i want different instance everytime....how to achieve that