local state

local state는 state에 mobx observable object를 할당하여 사용한다.

import { observable } from 'mobx'
import { observer } from 'mobx-react'

export default observer class Animal extends Component
  state: observable
    counter: 0

  onClick: =>
    @state.counter += 1

  render: =>
    <h4>{ @state.counter }</h4>
    <button onClick={@onClick}>click</button>