oneway inputs

components.form-field.js

import Ember from 'ember';

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

controllers.application.js

import Ember from 'ember';

let i = 9;
export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  v: 1,
  
  cv: Ember.computed('v', function() {
    return this.v + '[' + i++ + ']';
  }),
  
  actions: {
    changeValue(e) {
      Ember.set(this, 'v', e.target.value.replace(/\[\w*\]/, ''));
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

v = {{v}}
<br/>
<br/>

{{#form-field layoutName="components/form-field-layout-alternative"}}
  <input value={{cv}} oninput={{action "changeValue"}} />
{{/form-field}}

templates.components.form-field-layout-alternative.hbs

{{yield}}
omg

templates.components.form-field-layout.hbs

<label>I'm Form Field Layout</label>
{{yield}}

templates.components.form-field.hbs

{{#form-field-layout}}
  {{yield}}
{{/form-field-layout}}

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.13",
    "ember-data": "2.7.0",
    "ember-template-compiler": "1.13.13"
  },
  "addons": {}
}