import React, { Component } from 'react';

class App extends Component {
  constructor(props) {
    super(props)
    this.state = { matches: window.matchMedia("(min-width: 768px)").matches };
  }

  componentDidMount() {
    const handler = e => this.setState({matches: e.matches});
    window.matchMedia("(min-width: 768px)").addListener(handler);
  }
  render() {
    return (
      

      {this.state.matches && (
Big Screen
)}
      {!this.state.matches && (
Small Screen
)}
      
    );
  }
}

export default App;