[angular] Angular: How to update queryParams without changing route

First, we need to import the router module from angular router and declare its alias name

import { Router } from '@angular/router'; ---> import
class AbcComponent implements OnInit(){
constructor(
    private router: Router ---> decalre alias name
  ) { }
}

1. You can change query params by using "router.navigate" function and pass the query parameters

this.router.navigate([], { queryParams: {_id: "abc", day: "1", name: "dfd"} 
});

It will update query params in the current i.e activated route

  1. The below will redirect to abc page with _id, day and name as query params

    this.router.navigate(['/abc'], { queryParams: {_id: "abc", day: "1", name: "dfd"} });

    It will update query params in the "abc" route along with three query paramters

For fetching query params:-

    import { ActivatedRoute } from '@angular/router'; //import activated routed

    export class ABC implements OnInit {

    constructor(
        private route: ActivatedRoute //declare its alias name
      ) {}

    ngOnInit(){
       console.log(this.route.snapshot.queryParamMap.get('_id')); //this will fetch the query params
    }

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