What is the best way to monitor parameter changes in a nested route?

Question

What is the best way to monitor parameter changes in a nested route?

I need assistance with managing routes

const routes: Routes = [
  { path: 'home', component: HomeComponent },
  {
    path: 'explore',
    component: ExploreComponent,
    children: [
      { path: '', component: ProductListComponent },
      { path: ':categorySlug', component: ProductListComponent }
    ]
  }
];

This setup allows users to visit

/explore (without a specific category)

or

/explore/computers (with the category computers)

My goal is to be able to listen for changes in the categorySlug parameter from the parent (ExploreComponent) and handle those changes accordingly. How can this be achieved?

EDIT:

I attempted to subscribe using:

this.activatedRoute.firstChild.params.subscribe(console.log);

While it provides the desired outcome, it stops functioning when navigating to /explore (no specific category). It only works when using links like /explore/:categorySlug.

javascript angular typescript

Answer 1

Answer №1

To access the params in your component and retrieve the parameter, you can do so by following this example:

import { Router, ActivatedRoute } from '@angular/router';

constructor(private route: ActivatedRoute) {}
ngOnInit() {
  this.route.params.subscribe(params => {
          this.categorySlug= params['categorySlug '];
      });

  // perform actions using this.categorySlug
}

Note: Typically, a master-detail structure is utilized in web applications where the first path leads to the master and the second path leads to the detail, each handled by different components. However, if you intend to use the same component for both paths or if there isn't a clear master-detail relationship, make sure to check if the parameter is null.

Answer 2

To access the params in your component and retrieve the parameter, you can do so by following this example:

import { Router, ActivatedRoute } from '@angular/router';

constructor(private route: ActivatedRoute) {}
ngOnInit() {
  this.route.params.subscribe(params => {
          this.categorySlug= params['categorySlug '];
      });

  // perform actions using this.categorySlug
}

Note: Typically, a master-detail structure is utilized in web applications where the first path leads to the master and the second path leads to the detail, each handled by different components. However, if you intend to use the same component for both paths or if there isn't a clear master-detail relationship, make sure to check if the parameter is null.

What is the best way to monitor parameter changes in a nested route?

Answer №1

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