collapseAllTreeNodes

What does this API do?

Collapses all branch nodes in the current tree.

API for Pro features: Tree data

Exact input and result types

collapseAllTreeNodes(): Promise<void>

The return type is Promise<void>.

Usage flow

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

Feature explanations and examples

• Tree data

  Trees display parent-child data, such as folders or organizations, with indentation and expansion controls. Unlike grouping equal values, the parent relationship already exists in the data.