Basic layout with Routes

Layout.js

import { Link, Switch, Route } from "react-router-dom";
import Home from "./Home";
import About from "./About";
import Contact from "./Contact";

export default class Layout extends React.Component {
    /* ... */

    render() {
        return (
            <div>
                <h1>{ this.state.title }</h1>
                <div>
                    <Link to="/">Home</Link>
                    <Link to="/about">About</Link>
                    <Link to="/contact">Contact</Link>
                </div>
                <Switch>
                    <Route path="/" exact component={ Home } />
                    <Route path="/about" exact component={ About } />
                    <Route path="/contact" exact component={ Contact } />
                </Switch>
            </div>
        );
    }
}