Method select

src/cdk-experimental/selection/selection-set.ts:60–84

(...selects: SelectableWithIndex<T>[])

  }

  select(...selects: SelectableWithIndex<T>[]) {
    if (!this._multiple && selects.length > 1 && (typeof ngDevMode === 'undefined' || ngDevMode)) {
      throw Error('SelectionSet: not multiple selection');
    }

    const before = this._getCurrentSelection();

    if (!this._multiple) {
      this._selectionMap.clear();
    }

    const toSelect: SelectableWithIndex<T>[] = [];
    for (const select of selects) {
      if (this.isSelected(select)) {
        continue;
      }

      toSelect.push(select);
      this._markSelected(this._getTrackedByValue(select), select);
    }

    const after = this._getCurrentSelection();

    this.changed.next({before, after});
  }

  deselect(...selects: SelectableWithIndex<T>[]) {
    if (!this._multiple && selects.length > 1 && (typeof ngDevMode === 'undefined' || ngDevMode)) {