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url param

By Sore SnakeSore Snake on May 24, 2021
// ...
import { ActivatedRoute } from '@angular/router';
import 'rxjs/add/operator/filter';

@Component({ ... })
export class BookComponent implements OnInit {
  
  category: string;
  
  constructor(private route: ActivatedRoute) { }

  ngOnInit() {
    this.route.queryParams
      .filter(params => params.category)
      .subscribe(params => {
        console.log(params); // { category: "fiction" }
        this.category = params.category;
        console.log(this.category); // fiction
      }
    );
  }
}

Source: www.angularjswiki.com

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