Redirect to a different component inside @CanActivate in Angular2

Question

Is there any way we can redirect to a different component from @CanActivate in Angular2 ?

Answer 1

Yes, you can! Doing this will prevent your component from instantiating for nothing.

First, make a new file src/app-injector.ts

let appInjectorRef;

export const appInjector:any = (injector = false) => {
    if (!injector) {
        return appInjectorRef;
    }

    appInjectorRef = injector;

    return appInjectorRef;
};

Then, get the reference from bootstrap

// ...
import {appInjector} from './app-injector';
// ...


bootstrap(App, [
  ROUTER_PROVIDERS
]).then((appRef) => appInjector(appRef.injector));

Finally in your function

// ...
import {appInjector} from './app-injector';
// ...

@CanActivate((next, prev) => {
  let injector = appInjector();
  let router = injector.get(Router);

  if (42 != 4 + 2) {
    router.navigate(['You', 'Shall', 'Not', 'Pass']);
    return false;
  }

  return true;
})

Et voilà !

It was discussed here https://github.com/angular/angular/issues/4112

You can find a complete example here http://plnkr.co/edit/siMNH53PCuvUBRLk6suc?p=preview by @brandonroberts