Error: Promise was not caught: Unable to find any routes

I recently delved into learning Angular2 and started working on a sample project where I needed to navigate between three different pages.

In order to set up the routing, I configured a RouterModule within the app.module.ts file as shown below:

@NgModule({
  imports: [
    BrowserModule,
    HttpModule,
    FormsModule,

    RouterModule.forRoot([
    {path:'login',component : loginComponent},
    {path:'logout',component :logoutComponent},
    {path:'home',component : homeComponent}

])

The configuration of my app.component.ts file is as follows:

@Component({
  selector: 'my-app', // <my-app></my-app>
  providers: [Wakanda],
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})

Here's a snippet from my loginComponent.ts file:

@Component({
    selector:'login',
    template : `
    <h1>Login</h1>
    `
})

Similarly, the logoutComponent.ts file looks like this:

@Component({
    selector:'logout',
    template : `
    <h1>Login</h1>
    `
})

And lastly, the homeComponent.ts file consists of the following:

@Component({
    selector : 'home',
    template : `
    <h1>Login</h1>
    `
})

Within my app.component.html file, the navigation structure is set up as shown below:

<header>
    <nav>
    <div class="nav-wrapper">
      <ul class="right hide-on-med-and-down">
        <li> 
            <a routerLink ="./home">Home</a> 
        </li>
        <li class="active">
            <a routerLink="./login">LogIn</a>
        </li>
        <li>  
            <a routerLink="./logout">Log out</a> 
        </li>
      </ul>

    </div>
  </nav>
</header>
<main>
    <router-outlet></router-outlet>
</main>

Upon compiling the program, I encountered the following error:

EXCEPTION: Uncaught (in promise): Error: Cannot match any routes: ''

If anyone has a solution to resolve this issue, your help would be greatly appreciated.

Thank you in advance.

Answer №1

Consider establishing foundational global routes such as an empty route and a catch-all route for your Angular application.

Take a look at this example app-routing.module.ts:

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

import { PageNotFoundComponent } from './page-not-found.component';

const appRoutes: Routes = [
    {
        path: '',
        redirectTo: '/login',
        pathMatch: 'full'
    },
    { path: '**', component: PageNotFoundComponent }
];

@NgModule({
    imports: [
        RouterModule.forRoot(appRoutes, { enableTracing: true })
    ],
    exports: [
        RouterModule
    ]
})
export class AppRoutingModule { }

This part pertains to app.module.ts:

import { AppRoutingModule } from './app-routing.module';
...

@NgModule({
    imports: [
    ...
    AppRoutingModule // Ensure this is the last one
    ],
    bootstrap: [AppComponent]
})
export class AppModule { }

The PageNotFoundComponent is shown in the <router-outlet> (a simple component) when the route does not match any previously defined route, and the '' path corresponds to the empty route (localhost:4200/).

It's crucial to import your AppRoutingModule last in your AppModule because the router processes routes based on their registration order. By importing the 'matches anything' route last, you ensure that all other routes are examined first.

Enable enableTracing to aid in debugging navigation changes during development.

This should serve as a solid starting point for your project.

Answer №2

After some investigation, I identified the issue - I forgot to include the default path in the RouterModule configuration.

{
  path:'',
  redirectTo:'/login',
  pathMatch:'full'
} 

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