static dataApiKeydownHandler()

in applications/clouddemo/net4/CloudDemo.Mvc/Scripts/bootstrap.esm.js [2342:2377]

• 25 lines of code
• 10 McCabe index (conditional complexity)

  static dataApiKeydownHandler(event) {
    // If not an UP | DOWN | ESCAPE key => not a dropdown command
    // If input/textarea && if key is other than ESCAPE => not a dropdown command
    const isInput = /input|textarea/i.test(event.target.tagName);
    const isEscapeEvent = event.key === ESCAPE_KEY$2;
    const isUpOrDownEvent = [ARROW_UP_KEY$1, ARROW_DOWN_KEY$1].includes(event.key);

    if (!isUpOrDownEvent && !isEscapeEvent) {
      return;
    }

    if (isInput && !isEscapeEvent) {
      return;
    }

    event.preventDefault(); // todo: v6 revert #37011 & change markup https://getbootstrap.com/docs/5.2/forms/input-group/

    const getToggleButton = this.matches(SELECTOR_DATA_TOGGLE$3) ? this : SelectorEngine.prev(this, SELECTOR_DATA_TOGGLE$3)[0] || SelectorEngine.next(this, SELECTOR_DATA_TOGGLE$3)[0] || SelectorEngine.findOne(SELECTOR_DATA_TOGGLE$3, event.delegateTarget.parentNode);
    const instance = Dropdown.getOrCreateInstance(getToggleButton);

    if (isUpOrDownEvent) {
      event.stopPropagation();
      instance.show();

      instance._selectMenuItem(event);

      return;
    }

    if (instance._isShown()) {
      // else is escape and we check if it is shown
      event.stopPropagation();
      instance.hide();
      getToggleButton.focus();
    }
  }