issue-14578

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  init() {
    this._super(...arguments);
    this.a = 1;
    this.b = 0.5;
  },
  
  abs: Ember.computed('a', 'b', function() {
    return Math.min(this.get('a'), this.get('b'));
  }).readOnly()
});

templates.application.hbs

min: {{abs}} <br>

a:
<input value={{a}}
       type='number'
       onchange={{action (mut a) value='target.value'}} >
b:
<input value={{b}}
		   type='number'
       onchange={{action (mut b) value='target.value'}} >

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}