const
A DI token that you can use to provide one or more initialization functions.
const APP_INITIALIZER: InjectionToken<(() => void)[]>;
The provided functions are injected at application startup and executed during app initialization. If any of these functions returns a Promise, initialization does not complete until the Promise is resolved.
You can, for example, create a factory function that loads language data or an external configuration, and provide that function to the APP_INITIALIZER
token. The function is executed during the application bootstrap process, and the needed data is available on startup.
© 2010–2021 Google, Inc.
Licensed under the Creative Commons Attribution License 4.0.
https://v11.angular.io/api/core/APP_INITIALIZER