@angular/core

ExistingProvider

interface

Configures the Injector to return a value of another useExisting token.

  
    interface ExistingProvider extends ExistingSansProvider {}

Multi-value example

provide

any

An injection token. Typically an instance of Type or InjectionToken, but can be any.

multi

boolean | undefined

When true, injector returns an array of instances. This is useful to allow multiple providers spread across many files to provide configuration information to a common token.

useExisting

any

Existing token to return. (Equivalent to injector.get(useExisting))