I have a <side-menu> component in 2.0.0-alpha.13. Currently, to set the open class on the side menu to show/hide it, I have to manually manipulate the dom element:

import {Component, Template, NgElement} from 'angular2/angular2';
@Component({
  selector: 'side-menu'
})
@Template({
  inline: `<div class="scroll-area">
    <content></content>
  </div>`
})
class SideMenu {
  constructor(@NgElement() el: NgElement) {
    this.element = el;
  }
  //drag logic ommitted...
  setOpen(isOpen) {
    this.isOpen = isOpen;
    this.element.domElement.classList[isOpen ? 'add' : 'remove']('open');    
  }
}

I'd like to be able to setup a [class.open]="isOpen" binding on my component's element instead of having to do this.

@mhevery suggested injecting @PropertySetter('class.open') setter: Function into the constructor, but that errors when used because the actual setter function tries to set domElement.class.open. And domElement.class does not exist.