show()

in _/js/bootstrap.bundle.js [1538:1577]

• 38 lines of code
• 8 McCabe index (conditional complexity)

    show() {
      if (this._isTransitioning || this._isShown()) {
        return;
      }
      let activeChildren = [];

      // find active children
      if (this._config.parent) {
        activeChildren = this._getFirstLevelChildren(SELECTOR_ACTIVES).filter(element => element !== this._element).map(element => Collapse.getOrCreateInstance(element, {
          toggle: false
        }));
      }
      if (activeChildren.length && activeChildren[0]._isTransitioning) {
        return;
      }
      const startEvent = EventHandler.trigger(this._element, EVENT_SHOW$6);
      if (startEvent.defaultPrevented) {
        return;
      }
      for (const activeInstance of activeChildren) {
        activeInstance.hide();
      }
      const dimension = this._getDimension();
      this._element.classList.remove(CLASS_NAME_COLLAPSE);
      this._element.classList.add(CLASS_NAME_COLLAPSING);
      this._element.style[dimension] = 0;
      this._addAriaAndCollapsedClass(this._triggerArray, true);
      this._isTransitioning = true;
      const complete = () => {
        this._isTransitioning = false;
        this._element.classList.remove(CLASS_NAME_COLLAPSING);
        this._element.classList.add(CLASS_NAME_COLLAPSE, CLASS_NAME_SHOW$7);
        this._element.style[dimension] = '';
        EventHandler.trigger(this._element, EVENT_SHOWN$6);
      };
      const capitalizedDimension = dimension[0].toUpperCase() + dimension.slice(1);
      const scrollSize = `scroll${capitalizedDimension}`;
      this._queueCallback(complete, this._element, true);
      this._element.style[dimension] = `${this._element[scrollSize]}px`;
    }