Interface FactoryProvider

Configures the Injector to return a value by invoking a useFactory function.

See

"Dependency Injection Guide".

Usage Notes

{@example core/di/ts/provider_spec.ts region='FactoryProvider'}

Dependencies can also be marked as optional:

{@example core/di/ts/provider_spec.ts region='FactoryProviderOptionalDeps'}

Multi-value example

{@example core/di/ts/provider_spec.ts region='MultiProviderAspect'}

Public Api

Hierarchy

Properties

deps?: any[]

A list of tokens to be resolved by the injector. The list of values is then used as arguments to the useFactory function.

multi?: boolean

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.

provide: any

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

useFactory: Function

A function to invoke to create a value for this token. The function is invoked with resolved values of tokens in the deps field.

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