m.js

class Actor {
  constructor({state, actions, view}) {
    this.state = state
    	
    for (let [key, value] of Object.entries(actions)) {
    	if (typeof value == "function") {
      	actions[key] = value.bind(this, state)
      }
    }
    
    this.actions = actions
    this.view = view
  }
}

const view = new Actor({
  state: {
    count: 0
  },
  actions: {
  	increment: function(state) {
      state.count++
    },
    decriment: function(state) {
      state.count--
    },
    addX: function(state, x) {
    	state.count += x
    }
  },
  view: function() {
  	const {state, actions} = this
    
  	return m('div', [
    	m('h1', state.count),
      m('button', {
      	onclick: actions.increment
      }, '+1'),
      m('button', {
      	onclick: actions.decriment
      }, '-1'),
      m('button', {
      	onclick: actions.addX.bind(null, 5)
      }, '+5')
    ])
  },
});

m.mount(document.body, view)