text: import React, {Component} from 'react';
  import{
      collapse,
      Navbar,
      NavbarToggler,
      NavbarBrand,
      Nav,
      NavItem,
      NavLink,
      Container
  } from 'reactstrap';
  
  class AppNavbar extends Component{
      state = {
          isOpen: false
      }
  
      toggle = () => {
  this.setState({
      isOpen:!this.state.isOpen
  });
      }
  
      render(){
          return(
  
              <div>
              <Navbar color="dark" dark expand="sm" className="mb-5">
                  <Container>
                      <NavbarBrand herf="/">Courses List</NavbarBrand>
                      <NavbarToggler onClick={this.toggle} />
                      <collapse isOpen={this.state.isOpen} navbar>
                          <Nav className="ml-auto" navbar>
                              <NavItem>
                                  <NavLink href="https://github.com/Laith-Grira">GitHub</NavLink>
                              </NavItem>
                          </Nav>
                      </collapse>
                  </Container>
              </Navbar>
          </div>
          );
      }
  }
  
  export default AppNavbar;