action-mutation

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  observeAction: Ember.observer('action', function() {
    alert('action changed!');
  })
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  counter: 0,
  
  actions: {
    foo() {},
    
    increment() {
      this.incrementProperty('counter');
    }
  }
});

templates.application.hbs

<button onclick={{action 'increment'}}>increment</button>

{{my-component action=(action 'foo' counter)}}

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.1",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}