TSNODE-DI


Simple and lightweight dependency injection for Node TypeScript.

Getting Started

$3

``bash
npm install --save tsnode-di
`

$3

`TypeScript
import { Injector } from 'tsnode-di';
import { Injectable } from 'tsnode-di';

@Injectable()
class ProviderClass {
private aId: number;
constructor() {
this.aId = Math.ceil(Math.random() * 100000);
}
public get id(): number {
return this.aId;
}
}
@Injectable()
class ConsumerClass1 {
// using constructor DI to resolve Provider class
constructor(public provider: ProviderClass) { }
public get provider():ProviderClass {
return this.provider;
}
}
@Injectable()
class ConsumerClass2 {
// using @Resolve decorator to resolve ProviderClass
@Resolve(ProviderClass)
public provider: ProviderClass;
constructor() { }
public get provider():ProviderClass {
return this.provider;
}
}


// use Injector to resolve the consumer classes

const obj1 = Injector.resolve(ConsumerClass1);
const obj2 = Injector.resolve(ConsumerClass2);

// the following statement will not throw, because
// DI will provide the same instance of ProviderClass
// to both ConsumerClass1 and ConsumerClass2!
if(obj1.provider.id !== obj2.provider.id)
throw new Error("DI Failed!");

``