Method _subscribeToAllTabChanges

src/material/tabs/tab-group.ts:421–433

Listens to changes in all of the tabs.

()

  /** Listens to changes in all of the tabs. */
  private _subscribeToAllTabChanges() {
    // Since we use a query with `descendants: true` to pick up the tabs, we may end up catching
    // some that are inside of nested tab groups. We filter them out manually by checking that
    // the closest group to the tab is the current one.
    this._allTabs.changes.pipe(startWith(this._allTabs)).subscribe((tabs: QueryList<MatTab>) => {
      this._tabs.reset(
        tabs.filter(tab => {
          return tab._closestTabGroup === this || !tab._closestTabGroup;
        }),
      );
      this._tabs.notifyOnChanges();
    });
  }

  ngOnDestroy() {
    this._tabs.destroy();