Update scroll height again

Author: schloerke

js/dataframe/index.tsx

@@ -374,11 +374,11 @@ const ShinyDataGrid: FC<ShinyDataGridProps<unknown>> = (props) => {
   const headerRowCount = table.getHeaderGroups().length;
 
   // Assume we're scrolling until proven otherwise
-  let scrollingClass = "";
+  let scrollingClass = rowData.length > 0 ? "scrolling" : "";
   const scrollHeight = containerRef.current?.scrollHeight;
   const clientHeight = containerRef.current?.clientHeight;
-  if (scrollHeight && clientHeight && scrollHeight > clientHeight) {
-    scrollingClass = "scrolling";
+  if (scrollHeight && clientHeight && scrollHeight <= clientHeight) {
+    scrollingClass = "";
   }
 
   const makeHeaderKeyDown =

js/dataframe/styles.scss

@@ -51,9 +51,9 @@ shiny-data-frame {
 
 .shiny-data-grid {
   max-width: 100%;
-  height: 500px;
-  &:not(.scrolling) {
-    height: auto;
+  height: auto;
+  &.scrolling {
+    height: 500px;
   }
 
   > table {