Computed input

components.my-component.js

import Ember from 'ember';

export default Ember.TextField.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  formatValue(value) {
  	return parseFloat(value).toFixed(2);  
  },
  
  foobar: '123',
  
  computedFoobar: Ember.computed({
    get() {
      return this.formatValue(this.get('foobar'));
    },
    set(key, value) {
      return this.formatValue(this.set('foobar', value));
    }
  }),

});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
{{my-component value=computedFoobar}}
{{foobar}}
{{computedFoobar}}
<br>
<br>

templates.components.my-component.hbs

{{yield}}

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}