Service: No provider for Renderer2

Possibly duplicating with Using Renderer in Angular 4

You cannot inject Renderer2, but we can run RendererFactory2 to get Renderer2 instance inside @Injectable() service.
There are two different ways of solving this issue.

Get an instance of Renderer2 inside Service

There is the way which Angular using internally in webworkers, for example.
I’ve solved the problem with the code below:

import { Injectable, Renderer2, RendererFactory2 } from '@angular/core';

@Injectable()
class Service {
    private renderer: Renderer2;

    constructor(rendererFactory: RendererFactory2) {
        this.renderer = rendererFactory.createRenderer(null, null);
    }
}

In your particular case, it will be

@Injectable()
class Service {
  private renderer: Renderer2;

  constructor(rendererFactory: RendererFactory2, @Inject(DOCUMENT) private document){
    this.renderer = rendererFactory.createRenderer(null, null);
  }

  loadScript(src:string){
    const script = this.renderer.createElement('script');
    this.renderer.appendChild(this.document.body,script);
    script.src = src;
  }
}

Parameters of RendererFactory2.createRenderer method are:

• hostElement with type any
• type with type RendererType2|null

You can see that (null, null) parameters are here:
https://github.com/angular/angular/blob/e3140ae888ac4037a5f119efaec7b1eaf8726286/packages/core/src/render/api.ts#L129

Pass Renderer2 from component

// declare public property in your service
@Injectable()
class Service {
  renderer: Renderer;
}

// pass renderer to service in your component file
class App {
  name:string;
  constructor(service: Service, renderer: Renderer2) {
      service.renderer = renderer;
  }
}