Guran Injector

Typescript DI lib

Install

npm install guran-injector --save

Config tsconfig.json

{
    "compilerOptions":{
         "experimentalDecorators": true,
         "emitDecoratorMetadata": true,
    }
}

Usage

Decorators

Injectable - enable DI for class

@Injectable([provider: Object])
export class ClassOne {
    one() {
        return 1;
    }
}

Inject - manual mechanism for letting Guran know that a parameter must be injected

constructor(@Inject([class | {useValue: ...} | {useFactory: ()=>...}]) varitable: ClassOne){}

export class ClassOne {
    one() {
        return 1;
    }
}

export class ClassOneMock extends ClassOne{
    one() {
        return 1000;
    }
}

@Injectable()
export class ClassTwo {
    constructor(@Inject(ClassOneMock) private classOne: ClassOne) {
    }

    two() {
        return this.classOne.one() * 2;
    }
}

Core

Injector.invoke() - get instance class with DI

Injector.invoke<ClassTwo>(ClassTwo).two() => 2000

Injector.addProvider() - add provider to Guran registry

Injector.addProvider(ClassOne, {useValue: new ClassOneMock()});
Injector.invoke<ClassOne>(ClassOne).one() => 1000

Injector.removeProvider() - remove provider from Guran registry

Injector.invoke<ClassOne>(ClassOne).one() => 1000;
Injector.removeProvider(ClassOne);
Injector.invoke<ClassOne>(ClassOne).one() => 1

Injector.getProvider() - get provider from Guran registry

Injector.getProvider(ClassOne) => {useValue: obj=>ClassOne}

or

Injector.getProvider(ClassOne) => {useFactory: ()=>new ClassOne()}