Method _handleFocus

src/cdk/listbox/listbox.ts:704–714

Called when the listbox receives focus.

()

  /** Called when the listbox receives focus. */
  protected _handleFocus() {
    if (!this.useActiveDescendant) {
      if (this.selectionModel.selected.length > 0) {
        this._setNextFocusToSelectedOption();
      } else {
        this.listKeyManager.setNextItemActive();
      }

      this._focusActiveOption();
    }
  }

  /** Called when the user presses keydown on the listbox. */
  protected _handleKeydown(event: KeyboardEvent) {