field-input

components.field-input.js

import Ember from 'ember';
import computed from 'ember-computed';

export default Ember.Component.extend({
  classNameBindings: ['componentName'],
  componentName: computed(function() {
    return this
    .toString()
    .match(/:(.+)::/)[1]
  }),
  placeholder: computed('attrs', function() {
    const valueAttr = this.get('attrs').value;
    for (let key in valueAttr) {
      if (key.match(/__REF__/)) {
        return valueAttr[key]
        ._propertyKey
        .capitalize();
      }
    }
  }),
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
Automatically get the placeholder with this field input component
<br>
<br>
{{field-input value=username}}
<br>
<br>

templates.components.field-input.hbs

{{input                   
  value=value                         
  type=type
  placeholder=placeholder              
  }} 

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}