Method _getCellCompareValue

src/material/datepicker/month-view.ts:580–591

Gets the value that will be used to one cell to another.

(date: D | null)

  /** Gets the value that will be used to one cell to another. */
  private _getCellCompareValue(date: D | null): number | null {
    if (date) {
      // We use the time since the Unix epoch to compare dates in this view, rather than the
      // cell values, because we need to support ranges that span across multiple months/years.
      const year = this._dateAdapter.getYear(date);
      const month = this._dateAdapter.getMonth(date);
      const day = this._dateAdapter.getDate(date);
      return new Date(year, month, day).getTime();
    }

    return null;
  }

  /** Determines whether the user has the RTL layout direction. */
  private _isRtl() {