IReadOnlyObservableMap.has - Andrei15193/react-model-view-viewmodel GitHub Wiki

Checks whether there is a value associated with the provided key.

has(
  key: TKey
): boolean

Source reference: src/collections/observableMap/IReadOnlyObservableMap.ts:50.

• key: TKey
  The key to check.

Returns true if the provided key is found in the map; otherwise false.

• Map.has