component-props

components.sweet-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  someField: 'abcd',
  
  valueAfterClick: null,
  
  actions: {
    doStuff() {
      this.set('valueAfterClick',
               this.get('someField') + this.get('randomField')
              );
    }
  }
});

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>
{{sweet-component randomField="1234"}}
<br>
<br>

templates.components.sweet-component.hbs

<button {{action "doStuff"}}>Click me</button>

{{#if 'valueAfterClick'}}
	<p>{{valueAfterClick}}</p>
{{else}}
	<p>Click the button</p>
{{/if}}

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}