Method ngAfterContentInit

src/material/select/select.ts:643–658

()

  }

  ngAfterContentInit() {
    this._initialized.next();
    this._initialized.complete();

    this._initKeyManager();

    this._selectionModel.changed.pipe(takeUntil(this._destroy)).subscribe(event => {
      event.added.forEach(option => option.select());
      event.removed.forEach(option => option.deselect());
    });

    this.options.changes.pipe(startWith(null), takeUntil(this._destroy)).subscribe(() => {
      this._resetOptions();
      this._initializeSelection();
    });
  }

  ngDoCheck() {
    const newAriaLabelledby = this._getTriggerAriaLabelledby();