Method onContainerClick

src/material/select/select.ts:1405–1423

* Implemented as part of MatFormFieldControl. * @docs-private

(event: MouseEvent)

   * @docs-private
   */
  onContainerClick(event: MouseEvent) {
    const target = _getEventTarget(event) as HTMLElement | null;

    // Since the overlay is inside the form field, this handler can fire for interactions
    // with the container. Note that while it's redundant to select both for the popover
    // and select panel, we need to do it because it tests the clicks can occur after
    // the panel was detached from the popover.
    if (
      target &&
      (target.tagName === 'MAT-OPTION' ||
        target.classList.contains('cdk-overlay-backdrop') ||
        target.closest('.mat-mdc-select-panel'))
    ) {
      return;
    }

    this.focus();
    this.open();
  }

  /**
   * Implemented as part of MatFormFieldControl.