show()

in _/js/bootstrap.esm.js [1778:1805]

• 23 lines of code
• 7 McCabe index (conditional complexity)

  show() {
    if (isDisabled(this._element) || this._isShown()) {
      return;
    }
    const relatedTarget = {
      relatedTarget: this._element
    };
    const showEvent = EventHandler.trigger(this._element, EVENT_SHOW$5, relatedTarget);
    if (showEvent.defaultPrevented) {
      return;
    }
    this._createPopper();

    // If this is a touch-enabled device we add extra
    // empty mouseover listeners to the body's immediate children;
    // only needed because of broken event delegation on iOS
    // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
    if ('ontouchstart' in document.documentElement && !this._parent.closest(SELECTOR_NAVBAR_NAV)) {
      for (const element of [].concat(...document.body.children)) {
        EventHandler.on(element, 'mouseover', noop);
      }
    }
    this._element.focus();
    this._element.setAttribute('aria-expanded', true);
    this._menu.classList.add(CLASS_NAME_SHOW$6);
    this._element.classList.add(CLASS_NAME_SHOW$6);
    EventHandler.trigger(this._element, EVENT_SHOWN$5, relatedTarget);
  }