@boundary {
  <app-risky-component />
} @error (let err; retry 

= $reset; when 
isNetworkError(err)) {
  <app-network-error [error]="err" />
  <button (click)="retry()">Retry</button>
} @error {
  <app-generic-error />
}

@boundary {
  <app-chart-dashboard />
} @error (let
err; reset
=
$reset; when
isRenderError(err)) {
  <p>Network issue. Check your connection.</p>
  <button (click)="reset()">Retry</button>
} @error {
  <p>An unexpected error occurred: {{$error.message}}</p>
}

@boundary {
  <complex-chart [data]="data"/>
} @error (let err=$error; let r=$reset) {
  <p>Failed to load chart: {{err.message}}</p>
  <button (click)="r()">Retry</button>
}

@boundary {
  Main
} @error (let err; when err.message === '404') {
  Not Found
}

@boundary {
  Main
} @error (err = $error, retry
=
$reset) {
  <button (click)="retry()">Retry</button>
}