Method _handleArrowUp

packages/main/src/ComboBox.ts:985–1002

(e: KeyboardEvent, indexOfItem: number)

	}

	_handleArrowUp(e: KeyboardEvent, indexOfItem: number) {
		const isOpen = this.open;

		if (indexOfItem === 0) {
			this._clearFocus();
			this._itemFocused = false;
			this.focused = true;

			if (this.hasValueStateText && isOpen) {
				this._filteredItems[0].selected = false;
				this.value = this._userTypedValue;
			}

			return;
		}

		this._handleItemNavigation(e, --indexOfItem, false /* isForward */);
	}

	_handlePageUp(e: KeyboardEvent, indexOfItem: number) {
		const allItems = this._getItems();