treeNodeToggled

What does this API do?

Emitted when tree expansion changes. Inspect the path and expanded state.

API for Pro features: Tree data

Exact input and result types

treeNodeToggled: { path: readonly string[]; expanded: boolean }

Usage flow

Subscribe with grid.addEventListener('treeNodeToggled', handler). The result is in event.detail, and event names are case-sensitive. Remove subscriptions when disposing of the view.

const controller = new AbortController();
grid.addEventListener('treeNodeToggled', event => {
  console.log(event.detail);
}, { signal: controller.signal });
// On view disposal: controller.abort();

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.