@angular/core

Injector

Class

Concrete injectors implement this interface. Injectors are configured with providers that associate dependencies of various types with injection tokens.

abstract class Injector {
}

The following example creates a service injector instance.

Usage example

Injector returns itself when given Injector as a token:

get

5 overloads

Retrieves an instance from the injector based on the provided token.

@paramtokenProviderToken<T>

@paramnotFoundValueundefined

@paramoptionsInjectOptions & { optional?: false; }

@returnsT

Retrieves an instance from the injector based on the provided token.

@paramtokenProviderToken<T>

@paramnotFoundValuenull

@paramoptionsInjectOptions

@returnsT

Retrieves an instance from the injector based on the provided token.

@paramtokenProviderToken<T>

@paramnotFoundValueT

@paramoptionsInjectFlags | InjectOptions

@returnsT

Retrieves an instance from the injector based on the provided token.

@deprecated

use object-based flags (InjectOptions) instead.

@paramtokenProviderToken<T>

@paramnotFoundValueT

@paramflagsInjectFlags

@returnsT

@deprecated

from v4.0.0 use ProviderToken

@paramtokenany

@paramnotFoundValueany

@returnsany

THROW_IF_NOT_FOUND

{}

NULL

Injector

create

2 overloads

@deprecated

from v5 use the new signature Injector.create(options)

@paramprovidersStaticProvider[]

@paramparentInjector

@returnsInjector

Creates a new injector instance that provides one or more dependencies, according to a given type or types of StaticProvider.

@paramoptions

{ providers: (any[] | TypeProvider | ValueProvider | ClassProvider | ConstructorProvider | ExistingProvider | FactoryProvider | StaticClassProvider)[]; parent?: Injector; name?: string; }

An object with the following properties:

providers: An array of providers of the StaticProvider type.
parent: (optional) A parent injector.
name: (optional) A developer-defined identifying name for the new injector.

@returnsInjector