text: import React, {Component} from 'react';
  import {MainMenu} from './common/MainMenu';
  
  export class Header extends Component {
      render() {
          return (
              <nav className = "navbar navbar-dark bg-dark navbar-expand-lg col-lg-12">
                  <a className = "navbar-brand" href = "#"><img src = "/img/logo-light.png" alt = ""/></a>
                  <button className = "navbar-toggler" 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>
  
              </nav>
          );
      }
  }