Adds support for Retina displays.
If the browser runs on a Retina resolution and the reference image is available in double resoltion. It loads the Retina Image from the server.
Include the src/app/retina-image.ts file in your project.
Import the Directive in your App:
import {NgRetina} from './retina-image';
Use the directive in your HTML:
<img [ngRetina]="'img/angular-logo.png'" alt="">