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filter

filter operator filters values emitted by the source based on a provided predicate function.

filter<T>(filterFn: (value: T) => boolean, options: SignalFilterOptions<T> = {}): T | null

Parameters​

predicateA predicate function that determines whether a signal should be emitted true or filtered out false.
optionsOptional. The combination of CreateEffectOptions and CreateSignalOptions (excluding the allowSignalWrites property)

Example​

Even Numbers​

@Component({
  template: `
    <p>Interval: {{ intervalRef.interval() }} </p>
    <p>Is even: {{ isEven() }} </p>
  `
})
export class IntervalComponent {
  intervalRef = createInterval(0, 1000);
  private isEven = this.signalPipe(this.intervalRef.interval(), filter((count) => count % 2 === 0);
}