app.js

## app.js
import Component from './component';

class Widget extends Component {
  init(ctrl) {
    var props = this.props;

    ctrl.counter = props.initialValue;

    ctrl.increment = function() {
      ctrl.counter++;
    }
    ctrl.reset = function() {
      ctrl.counter = props.initialValue;
    }
  }
  view(ctrl) {
    return m('div', [
      m('h1', 'This widget is set up for: '+this.props.name),
      m('p', 'Counter: '+ctrl.counter),
      m('button', {onclick: ctrl.increment}, 'Increment Counter')
    ])
  }
}

class IndexPage extends Component {
  init(ctrl) {
    ctrl.widget = new Widget({name: 'foo', initialValue: 2}).instance()
  }
  view(ctrl) {
    return m('div', [
      ctrl.widget.render(),
      m('button', {onclick: ctrl.widget.reset}, 'Reset Counter')
    ]);
  }
}

m.mount(document.body, new IndexPage());

## component.js
export default class Component {
  constructor(props) {
    this.props = props || {};

    var component = this;
    this.controller = function() {
      var ctrl = {};
      component.init(ctrl);
      return ctrl;
    };
    this.controller.$original = this.init;
  }

  init(ctrl) {
  }

  instance() {
    var component = this;
    var controller = new this.controller();
    controller.render = function() {
      return component.view(controller);
    };
    return controller;
  }
}