       shellFloatingPanel.hasAttribute("hidden")
              ? shellFloatingPanel.removeAttribute("hidden")
              : shellFloatingPanel.setAttribute("hidden", "");

            shellFloatingPanel.positionElement = shellFloatingPanelButton;
          });

          const shellFloatingPanelOver = document.getElementById("shell-floating-panel-over");
          const shellFloatingPanelOverButton = document.getElementById("shell-floating-panel-over-button");
          shellFloatingPanelOverButton.addEve