mates-grid
Grouping & Aggregation
Set rowGroup on columns and aggFunc on measures. Expand/collapse from the auto group column or call grid.expandAll() / collapseAll().
Region → status
Counts and sums roll up. A grand total row sits at the bottom.
{ field: "region", rowGroup: true }
{ field: "amount", aggFunc: "sum" }
grid.expandAll();