Method ngOnDestroy

src/cdk/tree/tree.ts:279–300

()

  }

  ngOnDestroy() {
    this._nodeOutlet.viewContainer.clear();

    this._nodes.complete();
    this._keyManagerNodes.complete();
    this._nodeType.complete();
    this._flattenedNodes.complete();
    this.viewChange.complete();
    this._onDestroy.next();
    this._onDestroy.complete();

    if (this._dataSource && typeof (this._dataSource as DataSource<T>).disconnect === 'function') {
      (this.dataSource as DataSource<T>).disconnect(this);
    }

    this._dataSubscription?.unsubscribe();
    this._dataSubscription = undefined;

    // In certain tests, the tree might be destroyed before this is initialized
    // in `ngAfterContentInit`.
    this._keyManager?.destroy();
  }

  ngOnInit() {
    this._checkTreeControlUsage();