Type Alias: Provider

Imported from @react-logic/di

Provider<T> = ValueProvider<T> | ClassProvider<T> | FactoryProvider<T>

Defined in: di/src/lib/types.ts:86

Tells the DI container how to produce an instance for a given token. Three kinds:

• Value provider — supply a pre-built value. Used for primitives, pre-existing service instances, configuration objects.
• Class provider — give the container a class to instantiate when the token is first requested. The instance is cached for the lifetime of the scope.
• Factory provider — run a function to produce the value. Useful when construction needs control flow or asynchronous setup that doesn't fit a plain constructor.

For all three, the result is cached per-scope: every consumer of the token within the same scope receives the same instance/value. Disposal happens when the scope's <Injector> unmounts (or on HMR for the global scope).

Type Parameters

T

T = unknown

The type of the provided dependency.

Example

const valueProvider: Provider<string> = {
  provide: API_URL,
  useValue: 'https://api.example.com',
};

const classProvider: Provider<MyService> = {
  provide: MyService,
  useClass: MyServiceImpl,
};

const factoryProvider: Provider<MyService> = {
  provide: MyService,
  useFactory: () => new MyServiceImpl(loadConfig()),
};