Method isExpanded

src/cdk/tree/control/tree-control.ts:27–27

Whether the data node is expanded or collapsed. Return true if it's expanded.

(dataNode: T)

  /** Whether the data node is expanded or collapsed. Return true if it's expanded. */
  isExpanded(dataNode: T): boolean;

  /** Get all descendants of a data node */
  getDescendants(dataNode: T): any[];