Angular Material: How to close all mat-dialogs and sweet-alerts on logout

Question

I wanted to close all my dialog's (mat-dialog, bootstrap modals & sweet alerts) on logout in Angular. This is how it was done in AngularJS (version 1.5):

function logout() {
  //hide $mdDialog modal
  angular.element('.md-dialog-container').hide();

  //hide any open $mdDialog modals & backdrop
  angular.element('.modal-dialog').hide();
  angular.element('md-backdrop').remove();

  //hide any open bootstrap modals & backdrop
  angular.element('.inmodal').hide();
  angular.element('.fade').remove();

  //hide any sweet alert modals & backdrop
  angular.element('.sweet-alert').hide();
  angular.element('.sweet-overlay').remove();
}

How can I do this in Angular? Using $('.mat-dialog-container') or $('.inmodal') does't give me an option to do hide() or close()

I tried doing this, but I wan't able to get the element reference:

import { ElementRef, Injectable, ViewChild } from '@angular/core';
import { MatDialog, MatDialogContainer, MatDialogRef } from '@angular/material';

export class MyClass
{
  @ViewChild('.mat-dialog-container') _matDialog: ElementRef;
  @ViewChild('.mat-dialog-container') _matDialogRef:MatDialogRef<MatDialog>;

  constructor() { }

  function logout()
  {
    //access the dialogs here
  }
}

Answer 1

This is what i have done to close any open mat-dialog throughout the application:

import {MatDialog} from '@angular/material';

export class myClass {

constructor(private dialogRef: MatDialog) {
}

logOut()
{
  this.dialogRef.closeAll();
}

}

If you would like to close only a specific dialog you can loop through dialogRef.openDialogs and close the respective dialog using close()

This is how you can close any open/active sweet alert dialog:

const sweetAlertCancel = document.querySelector('.swal2-cancel') as HTMLElement;

if (sweetAlertCancel) {
    sweetAlertCancel.click(); //only if cancel button exists
}

const sweetAlertConfirm = document.querySelector('.swal2-confirm') as HTMLElement;

if (sweetAlertConfirm) {
   sweetAlertConfirm.click(); //if cancel doesn't exist , confirm is the equivalent for Ok button
}

Unlike material-dialog there is no method available to close or hide all open sweet alert dialog's. This is what i'm able to do so far.