@angular/forms/signals

AggregateMetadataKey

Class

Represents metadata that is aggregated from multiple parts according to the key's reducer function. A value can be contributed to the aggregated value for a field using an aggregateMetadata rule in the schema. There may be multiple rules in a schema that contribute values to the same AggregateMetadataKey of the same field.

API

    
      class AggregateMetadataKey<TAcc, TItem> {  constructor(reduce: (acc: TAcc, item: TItem) => TAcc, getInitial: () => TAcc): AggregateMetadataKey<TAcc, TItem>;}

constructor

AggregateMetadataKey<TAcc, TItem>

Use reducedMetadataKey.

@paramreduce(acc: TAcc, item: TItem) => TAcc

@paramgetInitial() => TAcc

@returnsAggregateMetadataKey<TAcc, TItem>