docs: Router - tell us to remove pathMatch: 'full' from lazy-routing modules #23900

I stumbled badly in child route configuration because the Router guide didn’t tell me to remove pathMatch: 'full' from lazy loaded routes!

See what I mean in “CrisisCenter” route configuration:

1. https://angular.io/guide/router#candeactivate-handling-unsaved-changes

2. Then search for pathMatch and you will end up here:

const crisisCenterRoutes: Routes = [
  {
    path: '',
    redirectTo: '/crisis-center',
    pathMatch: 'full'
  },
  {
    path: 'crisis-center',
    component: CrisisCenterComponent,
    children: [
      {
        path: '',
        component: CrisisListComponent,
        children: [
          // ... more
        ]
      }
    ]
  }
];

I followed that pattern in my app. But because my module lazy loads, only the empty child path matched. The :id route did not match and was reported as an error. The router event trace tells me it isn’t matching but not why.

Later in the Router Guide, we talk a bit about configuration but we don’t talk about pathMatch. It just silently disappears from the lazy load configuration.

We should call out how important it is to remove pathMatch from lazy-configured routes!