import React, { Component } from 'react';

class App extends Component {
  constructor(props) {
    super(props);
    this.state = {counter: 0};
  }
  CenterButtonClickEvent(e){
    this.setState((prevState, props) => ({
      counter: prevState.counter + 1
    }))
  }
  render() {
    return (
      <div>
        <button style={{"width" : "100%", "height": "97vh"}} onClick={this.CenterButtonClickEvent.bind(this)}>{this.state.counter}</button>
      </div>
    );
  }
}

export default App;