Angular 12 References/ Router
🍀 Angular References

[routerLink] directive

Lets you link to specific routes in your app.

Consider the following route configuration:

[{ path: 'user/:name', component: UserCmp }].

When linking to this user/:name route, you use the RouterLink directive.

If the link is static, you can use the directive as follows:

<a routerLink="/user/bob">link to user component</a>

If you use dynamic values to generate the link, you can pass an array of path segments, followed by the params for each segment.

For instance ['/team', teamId, 'user', userName, {details: true}] means that we want to generate a link to /team/11/user/bob;details=true.

Multiple static segments can be merged into one (e.g., ['/team/11/user', userName, {details: true}]).

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

  • If the first segment begins with /, the router will look up the route from the root of the app.
  • If the first segment begins with ./, or doesn't begin with a slash, the router will instead look in the children of the current activated route.
  • And if the first segment begins with ../, the router will go up one level.

You can set query params and fragment as follows:

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

RouterLink will use these to generate this link: /user/bob#education?debug=true.

You can also tell the directive to preserve the current query params and fragment:

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

You can tell the directive to how to handle queryParams, available options are:

  • 'merge': merge the queryParams into the current queryParams
  • 'preserve': preserve the current queryParams
  • default/'': use the queryParams only

The router link directive always treats the provided input as a delta to the current url.

For instance, if the current url is /user/(box//aux:team).

Then the following link <a [routerLink]="['/user/jim']">Jim</a> will generate the link /user/(jim//aux:team).