@WithNew

By default, dependencies are singletons — the same instance is returned each time. Use @WithNew() to create a new instance on every injection.

Basic Usage


class A {
  id = Math.random();
}
 
class B {
  constructor(@WithNew() @Inject(A) private a: A) {}
 
  getAId() {
    return this.a.id;
  }
}
 
const injector = new Injector([[A], [B]]);
 
const b1 = injector.createInstance(B);
const b2 = injector.createInstance(B);
 
b1.getAId() !== b2.getAId(); // true - different instances

With Factory Items


let counter = 0;
const ICounter = createIdentifier<number>("counter");
 
class MyService {
  constructor(@WithNew() @Inject(ICounter) public count: number) {}
}
 
const injector = new Injector([
  [MyService],
  [ICounter, { useFactory: () => counter++ }],
]);
 
injector.createInstance(MyService).count; // 0
injector.createInstance(MyService).count; // 1

Instances created with @WithNew() are not cached by the injector. You are responsible for disposing them when no longer needed.