Collapsed by default in EJ 1 ASP.NET Core PivotGrid
This feature is applicable only for the relational data source.
Allows you to collapse all members that are displayed in the grid. You can enable collapsing all members by default in the pivot grid by setting the
enable-collapse-by-default property to true.
<ej-pivot-grid id="PivotGrid1" enable-collapse-by-default="true"></ej-pivot-grid>