Input wrapping approach custom formatting mut

components.input-component.js

import Ember from 'ember';

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

components.input-wrapper-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  formatValue: function(value) {
    if (value) {
      return value + '8';
    }
  },
	actions: {
   	onkeyup(value) {
      var value = this.formatValue(value);
     	this.set('value', value); //external
     	this.set('internalValue', value);
    }
  }
});

components.mut-input.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',
  
  foobar: 'Test String',
  
  foobar2: 'Test 2',
  
  formatter(value) {
   	return value + '8'; 
  },
  
  actions: {
   	changeMut(value) {
      value = this.formatter(value);
      this.set('foobar2', value);
    }
  }
});

templates.application.hbs

<h1>Test</h1>
<br>
<br>
{{outlet}}

<h3>Wrapped input</h3>
{{input-wrapper-component value=foobar}}
{{foobar}}

<h3>Mut input</h3>
{{mut-input value=(readonly foobar2) key-up=(action 'changeMut')}}
{{foobar2}}
<br>
<br>

templates.components.input-wrapper-component.hbs

{{input-component value=internalValue key-up=(action 'onkeyup')}}

templates.components.mut-input.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": {}
}