content: import React from 'react';
  import { Navbar, Nav, NavItem } from 'react-bootstrap';
  import { IndexLink } from 'react-router';
  import { LinkContainer, IndexLinkContainer } from 'react-router-bootstrap';
  
  export default class Navigation extends React.Component {
    render() {
      return (
        <div >
          <Navbar inverse collapseOnSelect>
            <Navbar.Header>
              <Navbar.Brand>
                <IndexLink to="/">TimerApp</IndexLink>
              </Navbar.Brand>
              <Navbar.Toggle />
            </Navbar.Header>
            <Navbar.Collapse>
              <Nav pullRight>
                <IndexLinkContainer to="/">
                  <NavItem eventKey={1}>Timer</NavItem>
                </IndexLinkContainer >
                <LinkContainer to="/countdown">
                  <NavItem eventKey={2}>Countdown</NavItem>
                </LinkContainer>
              </Nav>
            </Navbar.Collapse>
          </Navbar>
        </div>
      );
    }
  }
  