input binding

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  count: 4,
  rawCount: 4,
  actions: {
    update(value) {
      if (value > 999) {
        this.set('count', 999);
      } else { 
        this.set('count', value);
      }
      this.set('rawCount', value);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
count: {{count}}
<br>
rawCount: {{rawCount}}
<br>
<input type="number" value={{count}} oninput={{action "update" value="target.value"}} />
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.9.3",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  }
}