In Angular2 how do I check if a route exists?
I have a method that remembers which route to navigate to if the user is not authorised.
On login I have:
this.router.navigate([this.authService.redirectUrl]);
But I only want to navigate IF the redirectUrl references a valid route, something like ..
if (this.authService.redirectUrl is a valid route) {
this.router.navigate([this.authService.redirectUrl]);
}
Is there any way to check this?
You can check if the route exists like that using the promise way :
this.router.navigate(['redirect'])
.then(data => {
console.log('Route exists, redirection is done');
})
.catch(e => {
console.log('Route not found, redirection stopped with no error raised');
});
If the route is defined, redirection will happen. If not, you can execute some code in the catch block.
I have the handling for preventing for the urls that doesn't exist
{path: 'dashboard', component: DashboardComponent}
{path: 'demo/:demo', component: DemoComponent},
{path: '**', redirectTo: '/dashboard'}
** means all the paths that are not able to redirect
Maybe with something like this :
redirectUrl: string;
this.redirectUrl = this.authService.redirectUrl ? this.authService.redirectUrl : '/home';
this.router.navigate([this.redirectUrl]);
This will check if the redirect url exist, if not it will redirect to the alternative route /home (you can change home to whatever you like)
Edit:
If you just want to check if this.authService.redirectUrl, you can try something like this :
if(this.authService.redirectUrl){
//do what you want
}