Method _emitChangeEvent

src/cdk/collections/selection-model.ts:193–207

Emits a change event and clears the records of selected and deselected values.

()

  /** Emits a change event and clears the records of selected and deselected values. */
  private _emitChangeEvent() {
    // Clear the selected values so they can be re-cached.
    this._selected = null;

    if (this._selectedToEmit.length || this._deselectedToEmit.length) {
      this.changed.next({
        source: this,
        added: this._selectedToEmit,
        removed: this._deselectedToEmit,
      });

      this._deselectedToEmit = [];
      this._selectedToEmit = [];
    }
  }

  /** Selects a value. */
  private _markSelected(value: T) {