fix regressino

mui · Jun 17, 2021 · a8f41dd · a8f41dd
1 parent c9151bd
commit a8f41dd
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/packages/grid/_modules_/grid/components/columnSelection/GridHeaderCheckbox.tsx b/packages/grid/_modules_/grid/components/columnSelection/GridHeaderCheckbox.tsx
@@ -24,7 +24,8 @@ export const GridHeaderCheckbox = React.forwardRef<HTMLInputElement, GridColumnH
     const totalRows = useGridSelector(apiRef, gridRowCountSelector);
 
     const isIndeterminate = totalSelectedRows > 0 && totalSelectedRows !== totalRows;
-    const isChecked = totalSelectedRows === totalRows || isIndeterminate;
+    // TODO core v5 remove || isIndeterminate, no longer has any effect
+    const isChecked = totalSelectedRows > 0 && totalSelectedRows === totalRows || isIndeterminate;
 
     const handleChange = (event: React.ChangeEvent<HTMLInputElement>) => {
       const checked = event.target.checked;