setColumnGroupOpened

What does this API do?

Expands or collapses the specified column group header.

Exact input and result types

setColumnGroupOpened(groupId: string, open: boolean): Promise<void>

The return type is Promise<void>.

Usage flow

After registering and initializing the Grid element, call grid.setColumnGroupOpened(…). Read the return value with await. For methods returning a boolean or report, inspect the result before continuing.

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.