AUR0767

Error Message

AUR0767: Aurelia.root was accessed without a valid root.

Description

The root property needs either a current application root or one configured for the next start. Calling app(...) creates that configuration. The property is available immediately and remains available throughout startup.

This state commonly occurs on a fresh Aurelia instance or after stop(true) disposed the configured root.

Solution

Configure the root before reading it:

import Aurelia from 'aurelia';
import { MyApp } from './my-app';

const aurelia = new Aurelia().app({
  host: document.querySelector<HTMLElement>('#app')!,
  component: MyApp,
});

const root = aurelia.root;
await aurelia.start();

Call app(...) again before a later start when the previous root was disposed.