Getting the current route segment only (not the entire URL) using Angular

When it comes to Angular, there are various discussions on how to obtain the current route. However, after examining numerous questions and corresponding responses, it seems that the solution provided typically returns the entire current URL.

constructor(router: Router){}

myMethod(){
    this.router.url // always gives the complete URL, regardless of the component's position in the routing tree
}

My objective is to determine the specific segment to which the router is directing my component. The component may be instantiated multiple times within the route. While my current code retrieves the full URL, I specifically want to pinpoint the exact segment responsible for instantiating the component.

Additional Details:

The component acts as a custom Tab Strip, featuring an unnamed <router-outlet> for rendering individual tab content whenever users interact with the tabs. The component employing the tab strip utilizes lazy loading. Interestingly, one of the tabs also leverages the same Tab Strip component for its content (which is likewise lazily loaded). This setup causes complications - upon refreshing the browser while on one of these nested tabs, an error occurs stating "Cannot activate an already activated outlet."

An investigation into this error message reveals that it is linked to an ongoing issue in Angular.

The suggested resolutions in a related thread eliminate the error but come at the cost of removing the top-level Tab Strip's content. My idea is that by refining the filter of the proposed solutions' RouterOutlet.deactivate() call, I could potentially resolve the error without compromising the display of Tab Strip content across all nesting levels.

To implement this improved filter, the Tab Strip component must ascertain the particular segment triggering its instantiation by the router.

Although the focus here is on retrieving the current segment from the Router, resolving the error that led me to this point would also prove beneficial.

Answer №1

Utilize the NavigationEnd event. Whenever a navigation occurs, the Router.events is triggered and checks for successful navigation to obtain the current route.

constructor(private router: Router) {
  router.events.subscribe(event => {
    if (event instanceof NavigationEnd) {
      console.log(event.url);
    }
  });
}

The event provides access to the url property of the current route.

Answer №2

UrlSegment is a useful tool designed for this specific purpose. Here's an example straight from the documentation:

@Component({templateUrl:'template.html'})
class MyComponent {
  constructor(router: Router) {
    const tree: UrlTree = router.parseUrl('/team;id=33');
    const g: UrlSegmentGroup = tree.root.children[PRIMARY_OUTLET];
    const s: UrlSegment[] = g.segments;
    s[0].path; // will retrieve 'team'
    s[0].parameters; // will return {id: 33}
  }
}

Explore more about UrlSegment on the Angular documentation page.

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