columnGroupShow

What does this API do?

Chooses whether the column appears when its parent group is expanded or collapsed.

Exact input and result types

columnGroupShow?: 'open' | 'closed'

Usage flow

Set this on an individual column object in columnDefs. Pass arrays, objects, and callbacks through JavaScript, and use new arrays or objects when applying changes.

Feature explanations and examples

• Multi-level headers

  Multi-level headers place related columns under a shared heading. Unlike row grouping, they do not change data counts or aggregate values.