```
## Grid virtualisation
Compose two `` tags — one for rows, one for columns — sharing the
-same scroll element:
+same scroll element. Each returns its own tag variable. Pass `getScrollElement` as an
+arrow (`() => ref()`) so each virtualizer resolves its own element:
```marko
```
@@ -133,69 +132,76 @@ same scroll element:
Use `` when the entire page scrolls rather than a container:
```marko
- 35
->
-
-
-
- Row ${item.index}
-
-
-
-
+/>
+
+
+
+ Row ${item.index}
+
+
+
```
## Dynamic / variable item sizes
-For items with unknown heights, use `measureElement` as an effect-driven ref
+For items with unknown heights, use `measureElement` as a `
-
- 35
- overscan=5
- >
-
-
-
- Row ${item.index}
-
-
+ 35
+ overscan=5
+ scrollMargin=listOffset
+ />
+ // totalSize is already margin-free (core subtracts scrollMargin), so it is the
+ // wrapper's height as-is; only item.start values carry the margin.
+