first commit

common/resources/client/ui/overlays/use-overlay-viewport.ts

@@ -0,0 +1,9 @@
+import {useViewportSize} from '@react-aria/utils';
+
+export function useOverlayViewport(): Record<string, string> {
+  const {width, height} = useViewportSize();
+  return {
+    '--be-viewport-height': `${height}px`,
+    '--be-viewport-width': `${width}px`,
+  };
+}