_maybeEnableSmoothScroll()

in js/bootstrap.bundle.js [5684:5709]

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

    _maybeEnableSmoothScroll() {
      if (!this._config.smoothScroll) {
        return;
      }

      // unregister any previous listeners
      EventHandler.off(this._config.target, EVENT_CLICK);
      EventHandler.on(this._config.target, EVENT_CLICK, SELECTOR_TARGET_LINKS, event => {
        const observableSection = this._observableSections.get(event.target.hash);
        if (observableSection) {
          event.preventDefault();
          const root = this._rootElement || window;
          const height = observableSection.offsetTop - this._element.offsetTop;
          if (root.scrollTo) {
            root.scrollTo({
              top: height,
              behavior: 'smooth'
            });
            return;
          }

          // Chrome 60 doesn't support `scrollTo`
          root.scrollTop = height;
        }
      });
    }