elmbery

components.my-component.js

import hbs from 'htmlbars-inline-precompile';
import component from 'twiddle/utils/component';

const view = hbs`
  <button onclick={{action 'update' 'decrement'}}>-</button>
  <div>{{model}}</div>
  <button onclick={{action 'update' 'increment'}}>+</button>
`;

function update(message, model) {
  if (message === 'increment') {
    return model + 1;
  } else if (message === 'decrement') {
    return model - 1;
  }
}   

export default component({ view, update });

templates.application.hbs

{{my-component 0}}

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}

utils.component.js

import Ember from 'ember';

export default function component({ view, update }) {
  return ElmyComponent.extend({ update, layout: view });
}

const ElmyComponent = Ember.Component.extend({
  actions: {
    update(message) {
      const update = this.get('update');
      this.set('model', update(message, this.get('model')));
    }
  }
}).reopenClass({
  positionalParams: ['model']
});