App.js

import React, {Component, Fragment} from 'react';
import Header from "../layouts/Header";
import classes from './App.scss'
import Button from "@material-ui/core/Button/Button";

class App extends Component {

    render() {
        return (
            <div className={classes.App}>
                <Header/>
                <Button>

                </Button>
            </div>
        );
    }
}

export default App;