I'm following the View Product Details tutorial on the angular website and encountered the error:

Error in src/app/product-details/product-details.component.html (4:16) Object is possibly 'undefined'.

I can't proceed to the next tutorial because it needs this page to function.

Here is the code:

product-list.component.html

<h2>Products</h2>

<div *ngFor="let product of products">

<h3>
  <a [title]="product.name + ' details'" [routerLink]="['/products', product.id]">
    {{ product.name }}
  </a>
</h3>   
</div>

product-details.component.ts

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { Product, products } from '../products';
@Component({
  selector: 'app-product-details',
  templateUrl: './product-details.component.html',
  styleUrls: ['./product-details.component.css']
})

export class ProductDetailsComponent implements OnInit {
  product: Product|undefined;
  constructor(
    private route: ActivatedRoute,
  ) { }

  ngOnInit() {
    // First get the product id from the current route.
    const routeParams = this.route.snapshot.paramMap;
    const productIdFromRoute = Number(routeParams.get('productId'));

    // Find the product that correspond with the id provided in route.
    this.product = products.find(product => product.id === productIdFromRoute);
  }

}

product-details.component.html

<h2>Product Details</h2>

<div *ngIf="product">
<h3>{{ product.name }}</h3>
<h4>{{ product.price | currency }}</h4>
<p>{{ product.description }}</p>

</div>

I hope someone can help to figure out the problem because I see the code is functioning.

Thank you.