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import { ChangeDetectionStrategy, Component, inject } from '@angular/core'
import { toSignal } from '@angular/core/rxjs-interop'
import { NonNullableFormBuilder, ReactiveFormsModule } from '@angular/forms'
import {
injectQuery,
keepPreviousData,
} from '@tanstack/angular-query-experimental'
import { debounceTime, distinctUntilChanged, lastValueFrom } from 'rxjs'
import { AutocompleteService } from '../services/autocomplete-service'
@Component({
changeDetection: ChangeDetectionStrategy.OnPush,
selector: 'example',
templateUrl: './example.component.html',
imports: [ReactiveFormsModule],
})
export class ExampleComponent {
readonly #autocompleteService = inject(AutocompleteService)
readonly #fb = inject(NonNullableFormBuilder)
readonly form = this.#fb.group({
term: '',
})
readonly term = toSignal(
this.form.controls.term.valueChanges.pipe(
debounceTime(300),
distinctUntilChanged(),
),
{ initialValue: '' },
)
readonly query = injectQuery(() => ({
queryKey: ['suggestions', this.term()],
queryFn: () => {
return lastValueFrom(
this.#autocompleteService.getSuggestions(this.term()),
)
},
placeholderData: keepPreviousData,
staleTime: 1000 * 60 * 5, // 5 minutes
}))
}
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