_keydown()

in js/bootstrap.bundle.js [5968:5988]

• 21 lines of code
• 5 McCabe index (conditional complexity)

    _keydown(event) {
      if (![ARROW_LEFT_KEY, ARROW_RIGHT_KEY, ARROW_UP_KEY, ARROW_DOWN_KEY, HOME_KEY, END_KEY].includes(event.key)) {
        return;
      }
      event.stopPropagation(); // stopPropagation/preventDefault both added to support up/down keys without scrolling the page
      event.preventDefault();
      const children = this._getChildren().filter(element => !isDisabled(element));
      let nextActiveElement;
      if ([HOME_KEY, END_KEY].includes(event.key)) {
        nextActiveElement = children[event.key === HOME_KEY ? 0 : children.length - 1];
      } else {
        const isNext = [ARROW_RIGHT_KEY, ARROW_DOWN_KEY].includes(event.key);
        nextActiveElement = getNextActiveElement(children, event.target, isNext, true);
      }
      if (nextActiveElement) {
        nextActiveElement.focus({
          preventScroll: true
        });
        Tab.getOrCreateInstance(nextActiveElement).show();
      }
    }