How to inject service into class (not component)

Question

I want to inject a service into a class that is not a component.

For example:

Myservice

import {Injectable} from \'         


        

Answer 1

This is kind of (very) hacky, but I thought I'd share my solution as well. Note that this will only work with Singleton services (injected at app root, not component!), since they live as long as your application, and there's only ever one instance of them.

First, in your service:

@Injectable()
export class MyService {
    static instance: MyService;
    constructor() {
        MyService.instance = this;
    }

    doSomething() {
        console.log("something!");
    }
}

Then in any class:

export class MyClass {
    constructor() {
        MyService.instance.doSomething();
    }
}

This solution is good if you want to reduce code clutter and aren't using non-singleton services anyway.