Router named outlets that are activated once

Question

Is it possible to have router named outlets that are activated once and then never destroyed, no matter what route is navigated in primary outlet?

The intention is t

Answer 1

skipLocationChange navigation option works only for a router it was supplied for, then named outlet appears in the url, like /login(foo:bar).

It's possible to have permanent foo router outlet by overriding UrlSerializer, as was suggested by @kemsky:

import {
  UrlSerializer, DefaultUrlSerializer, UrlSegmentGroup, UrlTree
} from '@angular/router';

export class FooUrlSerializer extends DefaultUrlSerializer {
  serialize(tree) {
    const { foo, ...noFooChildren } = tree.root.children;
    const root = new UrlSegmentGroup(tree.root.segments, noFooChildren);
    const noFooTree = Object.assign(new UrlTree(), tree, { root });

    return super.serialize(noFooTree);
  }
}

...
providers: [{ provide: UrlSerializer, useClass: FooUrlSerializer }, ...]
...