toast.ts

import { Component, OnInit } from '@angular/core';
import { MatSnackBar } from '@angular/material';

@Component({
  selector: 'app-toast',
  templateUrl: './toast.component.html',
  styleUrls: ['./toast.component.scss']
})
export class Toast implements OnInit {

  constructor(
    private snackBar: MatSnackBar
  ) { }

  ngOnInit() {
      this.snackBar.open('Product added to cart', 'OK', { duration: 4000 });
  }

}