Form Action

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({

  didInsertElement() {
    this._super(...arguments);
    Ember.run.schedule('afterRender', () => {
      //this.set('url', 'http://emberjs.com');
      this.setProperties({ url: 'https://emberjs.com' });
    });
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component}}
<br>
<br>

templates.components.my-component.hbs

<form target="_blank" method="POST" action={{url}}>
  <input type="submit" value="Submit" />
</form>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "beta",
    "ember-data": "2.11.0",
    "ember-template-compiler": "beta",
    "ember-testing": "beta"
  },
  "addons": {}
}