API Reference / @dasch-ng/utils / src / provideClass
Function: provideClass()
provideClass<
T>(provide,useClass,deps?,multi?):StaticClassProvider
Defined in: libs/ng/utils/src/lib/provide-helpers.ts:152
Creates a type-safe class provider for Angular dependency injection.
This helper ensures that the provided class is compatible with the injection token type, preventing type mismatches at compile time rather than runtime.
Type Parameters
T
T
The type of the injection token
Parameters
provide
InjectionToken<T> | Type<T>
The injection token or class to provide for
useClass
Type<T>
The class to instantiate (must be compatible with type T)
deps?
any[] = []
Optional array of dependencies to inject into the class constructor
multi?
boolean
Optional flag to enable multi-provider
Returns
StaticClassProvider
A type-safe StaticClassProvider object
Example
typescript
import { Injectable, InjectionToken } from '@angular/core';
import { provideClass } from '@dasch-ng/utils';
interface Logger {
log(message: string): void;
}
const LOGGER = new InjectionToken<Logger>('LOGGER');
@Injectable()
class ConsoleLogger implements Logger {
log(message: string): void {
console.log(message);
}
}
// Type-safe: ConsoleLogger implements Logger
provideClass(LOGGER, ConsoleLogger);
// With dependencies
provideClass(LOGGER, ConsoleLogger, [SomeDependency]);
// Type error: String does not implement Logger
// provideClass(LOGGER, String);