withInjectable and Inject with optional providers.

[juanenrisley]

Feature request

Optional injection feature in "withInjectable" HoC and "Inject" component.

Use case(s)

I just want a way to do optional injection to a react component like using "Optional" decorators. I have an optional injectable service and I do not want the application to crash with the error: "No provider for X!"

[Hotell]

I'm not completely sure I understand the issue here. can you provide codesandbox or at least some code snippet? thanks !

[Hotell]

Hmm, so what you want is basically similar functionality like Angular ElementInjector provides right? To be able to mark injected providers on component level, so that means, covering:

• @Optional
• @Self
• @SkipSelf

[Hotell]

Following api comes up in my mind:

<Inject values={tuple(ServiceA, optional(ServiceB))} >{
/* $ExpectType [ServiceA, ServiceB | null ] */
(instA, instB)=> { ... }
}</Inject>

WDYT?

• also just realised that Self and SkipSelf doesn't make any sense as I can't think of real life situation when you would do DependencyProvider with Inject as direct children

[juanenrisley]

Following api comes up in my mind:

<Inject values={tuple(ServiceA, optional(ServiceB))} >{
/* $ExpectType [ServiceA, ServiceB | null ] */
(instA, instB)=> { ... }
}</Inject>

WDYT?

• also just realised that Self and SkipSelf doesn't make any sense as I can't think of real life situation when you would do DependencyProvider with Inject as direct children

Yep, that's it. Just what I needed. For the time being, I think that with just @Optional covered is awesome!.