New Twiddle

components.response-value.js

import Ember from 'ember';

export default Ember.Component.extend({
  /* 不用 observer
  _isValueChange: Ember.observer('inputValue', function() {
    this.setupValue();
  }),*/
  
  // 用生命周期的钩子方法
  didReceiveAttrs() {
    this._super(...arguments);
    this.setupValue();
  },
  
  setupValue() {
    this.set('displayValue', this.get('inputValue'));
  },
  displayValue: '-',
  
  actions: {
    changeFoo() {
      this.toggleProperty('inputValue');
    }    
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'OBSERVER',
  
  actions: {
   	changeFoo() {
      this.toggleProperty(`model.foo`);
    },
    
    changeModel() {
      const foo = this.get(`model.foo`);
      this.set(`model`, { foo: !foo });
    }
  }
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return {
      foo: true
    };
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<hr>

<h3>组件外：</h3>

<p>显示 <code>model.foo</code>：{{model.foo}}</p>

<div>
	<button type="button" onclick={{action "changeFoo"}}>
  	改变 <code>model.foo</code>
  </button>
</div>

<div>
	<button type="button" onclick={{action "changeModel"}}>
  	改变 <code>model</code>
  </button>
</div>

<h3>组件里：</h3>

{{response-value inputValue=model.foo}}

{{outlet}}

templates.components.response-value.hbs

<div>
	<button type="button" onclick={{action "changeFoo"}}>
  	自己改变 <code>model.foo</code>
  </button>
</div>

{{displayValue}}

{{yield}}

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}