import React, { Component } from 'react';

class Button extends Component {
  constructor(props) {
    super(props);
    this.state = { counter: 0 };
  }

  increment = () => {
    const { counter } = this.state;
    this.setState({ counter: counter + 1 });
  }

  render() {
    const { counter } = this.state;
    return <button type="button" onClick={this.increment}>{counter}</button>;
  }

}

export default Button;