show()

in js/bootstrap.bundle.js [5131:5176]

• 39 lines of code
• 11 McCabe index (conditional complexity)

    show() {
      if (this._element.style.display === 'none') {
        throw new Error('Please use show on visible elements');
      }
      if (!(this._isWithContent() && this._isEnabled)) {
        return;
      }
      const showEvent = EventHandler.trigger(this._element, this.constructor.eventName(EVENT_SHOW$2));
      const shadowRoot = findShadowRoot(this._element);
      const isInTheDom = (shadowRoot || this._element.ownerDocument.documentElement).contains(this._element);
      if (showEvent.defaultPrevented || !isInTheDom) {
        return;
      }

      // TODO: v6 remove this or make it optional
      this._disposePopper();
      const tip = this._getTipElement();
      this._element.setAttribute('aria-describedby', tip.getAttribute('id'));
      const {
        container
      } = this._config;
      if (!this._element.ownerDocument.documentElement.contains(this.tip)) {
        container.append(tip);
        EventHandler.trigger(this._element, this.constructor.eventName(EVENT_INSERTED));
      }
      this._popper = this._createPopper(tip);
      tip.classList.add(CLASS_NAME_SHOW$2);

      // 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) {
        for (const element of [].concat(...document.body.children)) {
          EventHandler.on(element, 'mouseover', noop);
        }
      }
      const complete = () => {
        EventHandler.trigger(this._element, this.constructor.eventName(EVENT_SHOWN$2));
        if (this._isHovered === false) {
          this._leave();
        }
        this._isHovered = false;
      };
      this._queueCallback(complete, this.tip, this._isAnimated());
    }