Variable Export
export APP_ID
A DI Token representing a unique string id assigned to the application by Angular and used
primarily for prefixing application attributes and CSS styles when
ViewEncapsulation
is being used.
If you need to avoid randomly generated value to be used as an application id, you can provide
a custom value via a DI provider configuring the root Injector
using this token.
exported from core/index defined in core/src/application_tokens.ts