Locaft/src/components/NavBar.js

import React, {Component} from 'react';
import '../navbar.css';

class  NavBar extends Component {

    render(){
      window.addEventListener("scroll", () =>{
        var header = document.querySelector("header");
        header.classList.toggle("sticky",window.scrollY > 0);

      })
    return(
      <div class="navbar">
        <header>
          <a href="/home" class="logo">locaft</a>
          <ul>
            <li><a href="#">Home</a></li>
            <li><a href="#">About</a></li>
            <li><a href="#">Services</a></li>
            <li><a href="#">Contact us</a></li>
            <li><a href="#">Log In</a></li>
          </ul>
        </header>
      </div>
      
    )
    }
}
export default NavBar;