@angular/forms/signals

createMetadataKey

function

API

function createMetadataKey<TWrite>(): MetadataKey<
  Signal<TWrite | undefined>,
  TWrite,
  TWrite | undefined
>;
function createMetadataKey<TWrite, TAcc>(
  reducer: MetadataReducer<TAcc, TWrite>,
): MetadataKey<Signal<TAcc>, TWrite, TAcc>;

function createMetadataKey<TWrite>(): MetadataKey<Signal<TWrite | undefined>, TWrite, TWrite | undefined>;

Creates a metadata key used to contain a computed value. The last value set on a given field tree node overrides any previously set values.

@returnsMetadataKey<Signal<TWrite | undefined>, TWrite, TWrite | undefined>

function createMetadataKey<TWrite, TAcc>(reducer: MetadataReducer<TAcc, TWrite>): MetadataKey<Signal<TAcc>, TWrite, TAcc>;

Creates a metadata key used to contain a computed value.

@paramreducerMetadataReducer<TAcc, TWrite>

The reducer used to combine individually set values into the final computed value.

@returnsMetadataKey<Signal<TAcc>, TWrite, TAcc>