Yielding Actions

application.template.hbs

<h1>Welcome to my counter</h1>
<br>
{{#x-counter as |count increment decrement|}}
  The count is: {{count}} <br><br>
  {{x-button label="increment" on-click=increment}}
  {{x-button label="decrement" on-click=decrement}}
 {{/x-counter}}

components.x-button.js

import Ember from 'ember';

export default Ember.Component.extend({
  label: '',
  
  actions: {
    click() {
	  	this.attrs['on-click']();
    }
  }
});

components.x-counter.js

import Ember from 'ember';

export default Ember.Component.extend({
  totalCount: 0,
  
  actions: {
    increment() {
      this.incrementProperty('totalCount');
    },
    decrement() {
      this.decrementProperty('totalCount');
    }
  }
});

templates.components.x-button.hbs

<button {{action "click"}}>{{label}}</button>

templates.components.x-counter.hbs

{{yield totalCount (action "increment") (action "decrement")}}

twiddle.json

{
  "version": "0.4.14",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember-template-compiler.js"
  }
}