import React from 'react' if(typeof window !== 'undefined' && !window['HMR_RANDOM_NUMBER']) { window['HMR_RANDOM_NUMBER'] = Math.random() } export default class Counter extends React.Component { state = { count: 0 } incr () { const { count } = this.state this.setState({ count: count + 1 }) } render () { return (
COUNT: {this.state.count}