injectAsyncState

Description#

Create a reactive async state that auto-loads when signal dependencies change.

Must be called in an injection context (field initializer or constructor). The computation function is tracked by Angular's effect() — any signal read inside fn will cause a re-load when it changes.

readonly residents = injectAsyncState(
  () => this.api.getResidents(this.filter())
);
// Loads automatically when filter() changes.
// Caches last result during refresh (refreshing state).
// Deduplicates parallel requests.