feat(create-resource): Initial implementation of createResource

[eneajaho]

This PR implements createResource and supports Promises only.

Open for discussion.

Highly inspired from https://docs.solidjs.com/reference/basic-reactivity/create-resource

Depends on: #281 for computedPrevious change.

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[JeanMeche]

Suggested change

	if (p && isPromise(p)) {
	if (isPromise(p)) {

[JeanMeche]

Suggested change

	if (trigger() !== previousTrigger()) {
	state.set('refreshing');
	} else {
	state.set('pending');
	}
	state.set(trigger() !== previousTrigger() ? 'refreshing' : 'pending');

[ilirbeqirii]

maybe this can be renamed to 'status' thus matching the Type Parameter itself too?

[OmerGronich]

This is exactly what I was looking for! I spent the weekend implementing my own version of this (😅) and was introduced to this PR by @tomer953.

Quick question: How is resource.latest() different from simply calling resource.data()? I know in SolidJS it doesn't trigger transitions and Suspense, but we don't have that in Angular afaik. 🤔

[tomer953]

Oh I need this... yesterday!
Awesome work.

I wonder why exactly its working with Promise and not Observables?

• Observable are way more common in Angular
• Most of the http calls is made by the HttpClient Module who return observable (also, applying interceptors)
• wrapping with lastValueFrom(this.http.get('https://api.example.com/data')); will be extra boilerplate
• built in cancellation