[productId].[partid].page.ts

import { Component, inject } from '@angular/core';
import { AsyncPipe, JsonPipe } from '@angular/common';
import { ActivatedRoute } from '@angular/router';
import { map } from 'rxjs';

@Component({
  selector: 'app-product-details',
  standalone: true,
  imports: [AsyncPipe, JsonPipe],
  template: `
    <h2>Part Details</h2>

    ID: {{ productId$ | async }}
  `,
})
export default class ProductDetailsPageComponent {
  private readonly route = inject(ActivatedRoute);

  readonly productId$ = this.route.paramMap.pipe(
    map((params) => params.get('productId'))
  );
}