content: import React from 'react'
  
  export default class Navbar extends React.Component {
      render() {
          return (
              <nav className="navbar navbar-toggleable-md navbar-light bg-faded">
                  <button className="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse"
                          data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent"
                          aria-expanded="false" aria-label="Toggle navigation">
                      <span className="navbar-toggler-icon"></span>
                  </button>
                  <a className="navbar-brand" href="#">Navbar</a>
  
                  <div className="collapse navbar-collapse" id="navbarSupportedContent">
                      <ul className="navbar-nav mr-auto">
                          <li className="nav-item active">
                              <a className="nav-link" href="#">Home <span className="sr-only">(current)</span></a>
                          </li>
                          <li className="nav-item">
                              <a className="nav-link" href="#">Link</a>
                          </li>
                          <li className="nav-item">
                              <a className="nav-link disabled" href="#">Disabled</a>
                          </li>
                      </ul>
                      <form className="form-inline my-2 my-lg-0">
                          <input className="form-control mr-sm-2" type="text" placeholder="Search"/>
                          <button className="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
                      </form>
                  </div>
              </nav>)
      }
  }