Object.create(null) makes .constructor checks useless

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  hashConstructor: null,
  actionArgs: null,
  isObject: false,
  actions: {
    testHash(hash) {
      this.set('actionArgs', hash);
      if (!hash) {
        var thing = {"some":"object"};
        this.set('hashConstructor', thing);
        this.set('isObject', thing.constructor === Object);
      } else {
        this.set('hashConstructor', hash.constructor && hash.constructor.toString());
        this.set('isObject', 'not sure because there is no constructor');
      }
    }  
  }
});

templates.application.hbs

<h1><code>hash</code> helper and <code>object.constructor</code></h1>
<br>
<br>
{{outlet}}
<button {{action "testHash" (hash key="key")}} type="button">Pass an object with the hash helper</button>

<button {{action "testHash"}} type="button">Set an object literal in the controller</button>
<br>
<br>
This is the constructor: {{hashConstructor}}
<br>
<br>
The passed value is an object: {{isObject}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}