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@angular/forms/signals

createMetadataKey

function
stablesince v22.0

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.

Creating a metadata key

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    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>
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