ReadOnlyObservableSet.add

API / ReadOnlyObservableSet<TItem> / add method

Ensures the provided item is in the set. There can be at most only one instance of an item in a set at any given time.

protected add(
  item: TItem
): this

Source reference: src/collections/observableSet/ReadOnlyObservableSet.ts:262.

Parameters

• item: TItem
  The item to add to the set.

Returns: this

The observable set on which the operation is performed.

See also

• Set.add