Actions (ember map)

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  counter: 0,
  
  sayHi() {
    console.log('hi', this);
  },
  
	incrementCounter() {
    this.incrementProperty('counter');
  },
  
  actions: {
   	incrementCounterAction(delta=1) {
      this.set('counter', this.get('counter') + delta);
    }
  }
});

templates.application.hbs

<button onclick={{sayHi}}>say hi</button>

{{counter}}

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

<button onclick={{action actions.incrementCounterAction}}>
	increment
</button>

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

<button onclick={{action 'incrementCounterAction' 2}}>
	increment by 2
</button>

<button onclick={{action (action 'incrementCounterAction' 3)}}>
  increment by 3
</button>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}