@angular/router

RouterLink

directive

When applied to an element in a template, makes that element a link that initiates navigation to a route. Navigation opens one or more routed components in one or more <router-outlet> locations on the page.

  
    class RouterLink implements OnChanges ,OnDestroy {}

When applied to an element in a template, makes that element a link that initiates navigation to a route. Navigation opens one or more routed components in one or more <router-outlet> locations on the page.

Given a route configuration [{ path: 'user/:name', component: UserCmp }], the following creates a static link to the route: <a routerLink="/user/bob">link to user component</a>

You can use dynamic values to generate the link. For a dynamic link, pass an array of path segments, followed by the params for each segment. For example, ['/team', teamId, 'user', userName, {details: true}] generates a link to /team/11/user/bob;details=true.

Multiple static segments can be merged into one term and combined with dynamic segments. For example, ['/team/11/user', userName, {details: true}]

The input that you provide to the link is treated as a delta to the current URL. For instance, suppose the current URL is /user/(box//aux:team). The link <a [routerLink]="['/user/jim']">Jim</a> creates the URL /user/(jim//aux:team). See Router#createUrlTree for more information.

You can use absolute or relative paths in a link, set query parameters, control how parameters are handled, and keep a history of navigation states.

Relative link paths

The first segment name can be prepended with /, ./, or ../.

If the first segment begins with /, the router looks up the route from the root of the app.
If the first segment begins with ./, or doesn't begin with a slash, the router looks in the children of the current activated route.
If the first segment begins with ../, the router goes up one level in the route tree.

Setting and handling query params and fragments

The following link adds a query parameter and a fragment to the generated URL:

          <a [routerLink]="['/user/bob']" [queryParams]="{debug: true}" fragment="education">  link to user component</a>

By default, the directive constructs the new URL using the given query parameters. The example generates the link: /user/bob?debug=true#education.

You can instruct the directive to handle query parameters differently by specifying the queryParamsHandling option in the link. Allowed values are:

'merge': Merge the given queryParams into the current query params.
'preserve': Preserve the current query params.

For example:

          <a [routerLink]="['/user/bob']" [queryParams]="{debug: true}" queryParamsHandling="merge">  link to user component</a>

queryParams, fragment, queryParamsHandling, preserveFragment, and relativeTo cannot be used when the routerLink input is a UrlTree.

See {@link UrlCreationOptions#queryParamsHandling}.

Preserving navigation history

You can provide a state value to be persisted to the browser's History.state property. For example:

          <a [routerLink]="['/user/bob']" [state]="{tracingId: 123}">  link to user component</a>

Use {@link Router#getCurrentNavigation} to retrieve a saved navigation-state value. For example, to capture the tracingId during the NavigationStart event:

          // Get NavigationStart eventsrouter.events.pipe(filter(e => e instanceof NavigationStart)).subscribe(e => {  const navigation = router.getCurrentNavigation();  tracingService.trace({id: navigation.extras.state.tracingId});});

href

string

Represents an href attribute value applied to a host element, when a host element is <a>. For other tags, the value is null.

target

string

Represents the target attribute on a host element. This is only used when the host element is an <a> tag.

queryParams

Params

Passed to Router#createUrlTree as part of the UrlCreationOptions.

fragment

string

Passed to Router#createUrlTree as part of the UrlCreationOptions.

queryParamsHandling

QueryParamsHandling

Passed to Router#createUrlTree as part of the UrlCreationOptions.

state

{ [k: string]: any; }

Passed to Router#navigateByUrl as part of the NavigationBehaviorOptions.

info

unknown

Passed to Router#navigateByUrl as part of the NavigationBehaviorOptions.

relativeTo

ActivatedRoute

Passed to Router#createUrlTree as part of the UrlCreationOptions. Specify a value here when you do not want to use the default value for routerLink, which is the current activated route. Note that a value of undefined here will use the routerLink default.

preserveFragment

boolean

Passed to Router#createUrlTree as part of the UrlCreationOptions.

skipLocationChange

boolean

Passed to Router#navigateByUrl as part of the NavigationBehaviorOptions.

replaceUrl

boolean

Passed to Router#navigateByUrl as part of the NavigationBehaviorOptions.

ngOnChanges

void

@paramchangesSimpleChanges

@returnsvoid

routerLink

string | any[] | UrlTree

Commands to pass to Router#createUrlTree or a UrlTree.

array: commands to pass to Router#createUrlTree.
string: shorthand for array of commands with just the string, i.e. ['/route']
UrlTree: a UrlTree for this link rather than creating one from the commands and other inputs that correspond to properties of UrlCreationOptions.
null|undefined: effectively disables the routerLink

onClick

boolean

@parambuttonnumber

@paramctrlKeyboolean

@paramshiftKeyboolean

@paramaltKeyboolean

@parammetaKeyboolean

@returnsboolean

ngOnDestroy

any

@returnsany

urlTree

UrlTree

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