One Way Input

components.one-way-input.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'input',
  type: 'text',
	attributeBindings: ['value'],
  input(e) {
    let val = this.readDOMAttr('value');
    /*
    *   this.attrs.update(val)
    *   
    *      OR...
    *
    *   this.attrs.value.update(val)
    */
    this.attrs.value.update(val);
  } 
  
});

templates.application.hbs

<h1>Welcome!</h1>

{{currentValue}}

<br>
{{one-way-input
  value=currentValue
  update=(action (mut currentValue))
}}

{{outlet}}

twiddle.json

{
  "version": "0.4.8",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.2.0",
    "ember-template-compiler": "2.2.0",
    "ember-data": "2.2.0"
  }
}