Function open

src/material/datepicker/datepicker-base.ts:644–659

Open the calendar.

()

  /** Open the calendar. */
  open(): void {
    // Skip reopening if there's an in-progress animation to avoid overlapping
    // sequences which can cause "changed after checked" errors. See #25837.
    if (this._opened || this.disabled || this._componentRef?.instance._isAnimating) {
      return;
    }

    if (!this.datepickerInput && (typeof ngDevMode === 'undefined' || ngDevMode)) {
      throw Error('Attempted to open an MatDatepicker with no associated input.');
    }

    this._focusedElementBeforeOpen = _getFocusedElementPierceShadowDom();
    this._openOverlay();
    this._opened = true;
    this.openedStream.emit();
  }

  /** Close the calendar. */
  close(): void {