Append global event listener in Angular app

image.component.ts

import {Renderer } from '@angular/core';

export class ImagegalleryComponent implements OnInit {

    constructor(private renderer: Renderer, private imageService: ImageService) {
        this._renderer.listen('document', 'dragstart', (evt) => {
            this.imageService.setImageToUpload(evt.path[0].src, evt.path[0].id);
        });
    }

}