GroupDescriptor

The group descriptor used by the groupBy method.

ts

const groupDescriptor: GroupDescriptor[] = [
  {
    field: 'UnitsInStock',
    dir: 'asc',
    aggregates: [
      { field: 'UnitsInStock', aggregate: 'sum' },
      { field: 'UnitPrice', aggregate: 'average' },
    ],
  },
];

aggregates? Array<AggregateDescriptor>

The aggregates which are calculated during grouping.

compare? (a: any, b: any) => number

A custom function that defines the sort order of the group.

dir? "asc" | "desc"

The sort order of the group.

field string

The data item field by which the data will be grouped.