gistfile1.txt

import {inject} from 'aurelia-framework';
import {HttpClient} from 'aurelia-http-client';

var autobind = fnDecorator(function(target, key, descriptor){
  let fn = descriptor.value;
  descriptor.value = function autobound(){
    return fn.bind(this,arguments);
  };
  return descriptor;
});

export class au {
  this.inject = inject;
  this.http = HttpClient;
  this.autobind = autobind;
}

// Then in your module - 
import {Behavior} from 'aurelia-framework';
import {au} from './decorators';

@au.inject(Behavior)
class Whatever { 
  constructor(behavior){
    this.behavior = behavior;
  }
}