Provides access to information about a route associated with a component that is loaded in an outlet. Use to traverse the RouterState tree and extract information from nodes.

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class ActivatedRoute {
  snapshot: ActivatedRouteSnapshot
  title: Observable<string | undefined>
  url: Observable<UrlSegment[]>
  params: Observable<Params>
  queryParams: Observable<Params>
  fragment: Observable<string | null>
  data: Observable<Data>
  outlet: string
  component: Type<any> | null
  routeConfig: Route | null
  root: ActivatedRoute
  parent: ActivatedRoute | null
  firstChild: ActivatedRoute | null
  children: ActivatedRoute[]
  pathFromRoot: ActivatedRoute[]
  paramMap: Observable<ParamMap>
  queryParamMap: Observable<ParamMap>
  toString(): string
}

See also

• Getting route information

Description

The following example shows how to construct a component using information from a currently activated route.

Note: the observables in this class only emit when the current and previous values differ based on shallow equality. For example, changing deeply nested properties in resolved data will not cause the ActivatedRoute.data Observable to emit a new value.

import {Component} from '@angular/core';
/* . . . */
import {ActivatedRoute} from '@angular/router';
import {Observable} from 'rxjs';
import {map} from 'rxjs/operators';
/* . . . */

@Component({
  /* . . . */
})
export class ActivatedRouteComponent {
  constructor(route: ActivatedRoute) {
    const id: Observable<string> = route.params.pipe(map(p => p.id));
    const url: Observable<string> = route.url.pipe(map(segments => segments.join('')));
    // route.data includes both `data` and `resolve`
    const user = route.data.pipe(map(d => d.user));
  }
}

Properties

Property	Description
snapshot: ActivatedRouteSnapshot	The current snapshot of this route
title: Observable<string | undefined>	Read-Only An Observable of the resolved route title
url: Observable<UrlSegment[]>	An observable of the URL segments matched by this route.
params: Observable<Params>	An observable of the matrix parameters scoped to this route.
queryParams: Observable<Params>	An observable of the query parameters shared by all the routes.
fragment: Observable<string | null>	An observable of the URL fragment shared by all the routes.
data: Observable<Data>	An observable of the static and resolved data of this route.
outlet: string	The outlet name of the route, a constant.
component: Type<any> | null	The component of the route, a constant.
routeConfig: Route | null	Read-Only The configuration used to match this route.
root: ActivatedRoute	Read-Only The root of the router state.
parent: ActivatedRoute | null	Read-Only The parent of this route in the router state tree.
firstChild: ActivatedRoute | null	Read-Only The first child of this route in the router state tree.
children: ActivatedRoute[]	Read-Only The children of this route in the router state tree.
pathFromRoot: ActivatedRoute[]	Read-Only The path from the root of the router state tree to this route.
paramMap: Observable<ParamMap>	Read-Only An Observable that contains a map of the required and optional parameters specific to the route. The map supports retrieving single and multiple values from the same parameter.
queryParamMap: Observable<ParamMap>	Read-Only An Observable that contains a map of the query parameters available to all routes. The map supports retrieving single and multiple values from the query parameter.

Methods

toString()
toString(): string Parameters There are no parameters. Returns string