Hide expand widget

[GregoryBologna]

I have this expand widget. I want to hide it OR disable it when fullscreen is active. How??

          var screenshotExpand = new Expand({

            content: dvExpandContent,

            view: view,

            expandIconClass: "esri-icon-sketch-rectangle",

            expandTooltip: 'Screenshot',

            autoCollapse: true,

            expanded: false,

            group: "top-right"

          }); // end screenshotExpand