New Twiddle

components.number-count.js

import Ember from 'ember';
import hbs from 'htmlbars-inline-precompile';
import { connect } from 'ember-redux';

const stateToComputed = state => {
  return {
    number: state.number
  };
};

const dispatchToActions = dispatch => {
  return {
    add: () => dispatch({type: 'ADD'})
  };
};

const NumbersComponent = Ember.Component.extend({
    layout: hbs`
      {{number}}
      <button onclick={{action "add"}}>add</button>
    `
});

export default connect(stateToComputed, dispatchToActions)(NumbersComponent);

reducers.index.js

import { combineReducers } from 'redux';

const number = ((state, action) => {
    if(action.type === 'ADD') {
        return state + 1;
    }
    return state || 0;
});

export default combineReducers({
    number
});

templates.application.hbs

<h1>Ember Redux</h1>
<h1>Counter Example</h1>
<br>
<br>
{{number-count}}

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-redux": "4.0.0"
  }
}