How to use a function as the redirectTo parameter in Angular 2+ routing

In my Angular application, I have set up the following route configuration:

{
  path: ParentComponent.path,
  component: ParentComponent,
  canActivate: [AuthGuard],
  children: [
    {
      path: '',
      pathMatch: 'full',
      redirectTo: getDefaultChildRoute()
    },
    {
      path: ':mode/:year/:month/:day',
      component: ChildComponent
    }
  ]
}

The function getDefaultChildRoute() is responsible for generating a string in this format:

export function getDefaultChildRoute(): string {
  const urlArray = ['a', '2019', '02'];
  return urlArray.join('/');
}

The issue here is that the redirectTo property requires a string value, not a method call (even if the method returns a string). When I replace the method call with a static string, it functions correctly.

There is a known issue related to this on GitHub: https://github.com/angular/angular/issues/13373

Attempting to use an arrow function directly in the redirectTo property results in a Typescript error '()=>string is not assignable to type string'.

Any suggestions on how to approach this problem?

Answer №1

Give this a shot:

redirectingTo: (path: ActivatedRouteSnapshot, status: RouterStateSnapshot) => {
    const pageURL = ['example', '2020', '09'];
    return pageURL.join('/');
}

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