From Get docs
< @angular/routerAngular/docs/8/api/router/navigationextras



Options that modify the navigation strategy.

interface NavigationExtras {
  relativeTo?: ActivatedRoute | null
  queryParams?: Params | null
  fragment?: string
  preserveQueryParams?: boolean
  queryParamsHandling?: QueryParamsHandling | null
  preserveFragment?: boolean
  skipLocationChange?: boolean
  replaceUrl?: boolean
  state?: {...}


Property Description

Specifies a root URI to use for relative navigation.

For example, consider the following route configuration where the parent route has two children.

  path: 'parent',
  component: ParentComponent,
  children: [{
    path: 'list',
    component: ListComponent
    path: 'child',
    component: ChildComponent

The following go() function navigates to the list route by interpreting the destination URI as relative to the activated child route

 class ChildComponent {
   constructor(private router: Router, private route: ActivatedRoute) {}

   go() {
     this.router.navigate(['../list'], { relativeTo: this.route });

Sets query parameters to the URL.

// Navigate to /results?page=1
this.router.navigate(['/results'], { queryParams: { page: 1 } });
fragment?: string

Sets the hash fragment for the URL.

// Navigate to /results#top
this.router.navigate(['/results'], { fragment: 'top' });
preserveQueryParams?: boolean DEPRECATED: Use queryParamsHandling: "preserve" instead to preserve query parameters for the next navigation.

How to handle query parameters in the router link for the next navigation. One of:

  • merge : Merge new with current parameters.
  • preserve : Preserve current parameters.
// from /results?page=1 to /view?page=1&page=2
this.router.navigate(['/view'], { queryParams: { page: 2 },  queryParamsHandling: "merge" });
preserveFragment?: boolean

When true, preserves the URL fragment for the next navigation

// Preserve fragment from /results#top to /view#top
this.router.navigate(['/view'], { preserveFragment: true });
skipLocationChange?: boolean

When true, navigates without pushing a new state into history.

// Navigate silently to /view
this.router.navigate(['/view'], { skipLocationChange: true });
replaceUrl?: boolean

When true, navigates while replacing the current state in history.

// Navigate to /view
this.router.navigate(['/view'], { replaceUrl: true });
state?: { [k: string]: any; }

Developer-defined state that can be passed to any navigation. Access this value through the Navigation.extras object returned from router.getCurrentNavigation() while a navigation is executing.

After a navigation completes, the router writes an object containing this value together with a navigationId to history.state. The value is written when location.go() or location.replaceState() is called before activating this route.

Note that history.state does not pass an object equality test because the router adds the navigationId on each navigation.

© 2010–2020 Google, Inc.
Licensed under the Creative Commons Attribution License 4.0.