dfCustomElement

import { inject, Aurelia, View } from 'aurelia-framework';

@inject(Aurelia, Element)
export class DFCustomElement {

  constructor(aurelia, element) {
    this.container = aurelia.container;    
    this.element = element;
  }

  attached() {
    this.view = this.container.get(View);
  }

  removeMyself() {
    this.element.remove();
    this.view.detached();
    this.view.unbind();
  }
}

enhanceHelper.js

function enhanceFragment(targetElement) {

  function proceed() {
   
    let aurelia = window.DFAurelia;
    let engine = aurelia.container.get(TemplatingEngine);
   
    let view = engine.enhance({
      container: aurelia.container,
      element: targetElement,
      resources: aurelia.resources
    });
    container.registerInstance(View, view);
  }
}