Inject constructor

you can inject objects to constructor arguments.

The object instance can be injected by id or by value.

@define()
@singleton()
export class FooManager{
    get name () {
        return 'foo'
    }
}
@define()
export class BuzzController{
    constructor (@inject() fooManager:FooManager,name:string) {
        this.fooManager = fooManager;
        this.name = name;
    }
    name () {
        return   this.fooManager.name +this.name
    }
}

var buzzController = injector.getObject<BuzzController>(BuzzController,["buzz"]);
console.log(buzzController.name()) // foobuzz

it is not recommended to inject objects to constructor because it can easily lead to circular reference.

it is not possible to use injected object via @inject property in the constructor because it is not yet injected.

@define()
@singleton()
export class FooManager{
    get name () {
        return 'foo'
    }
}
@define()
export class BuzzController{

    @inject fooManager:FooManager;

    constructor () {
        this.name =  this.fooManager.name();
        //throw Error this.fooManager is undefined
    }

}

let buzzController = injector.getObject<BuzzController>(BuzzController);

use @init to solve this

@define()
@singleton()
export class FooManager{
    get name () {
        return 'foo'
    }
}
@define()
export class BuzzController{

    @inject fooManager:FooManager;

    @init()
    init(){
        this.name =  this.fooManager.name();
    }
}

let buzzController = injector.getObject<BuzzController>(BuzzController);