yarn add @n8tb1t/use-scroll-position

import React from "react";
import { Link } from "gatsby";
import github from "../img/github-icon.svg";
import logo from "../img/logo.svg";

const Navbar = class extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      active: false,
      navBarActiveClass: "",
    };
  }

  toggleHamburger() {
    // toggle the active boolean in the state
    this.setState(
      {
        active: !this.state.active,
      },
      // after state has been updated,
      () => {
        // set the class in state for the navbar accordingly
        this.state.active
          ? this.setState({
              navBarActiveClass: "is-active",
            })
          : this.setState({
              navBarActiveClass: "",
            });
      }
    );
  }

  render() {
    return (
      <nav
        className="navbar is-transparent"
        role="navigation"
        aria-label="main-navigation"
      >
        <div className="container">
          <div className="navbar-brand">
            <Link to="/" className="navbar-item" title="Logo">
              <img src={logo} alt="hi1t0" style={{ width: "88px" }} />
            </Link>
            <Link className="navbar-item" to="/cart">
              Cart
            </Link>
            {/* Hamburger menu */}
            <div
              className={`navbar-burger burger ${this.state.navBarActiveClass}`}
              data-target="navMenu"
              role="menuitem"
              tabIndex={0}
              onKeyPress={() => this.toggleHamburger()}
              onClick={() => this.toggleHamburger()}
            >
              <span />
              <span />
              <span />
            </div>
          </div>
          <div
            id="navMenu"
            className={`navbar-menu ${this.state.navBarActiveClass}`}
          >
            <div className="navbar-start has-text-centered">
              <Link className="navbar-item" to="/products">
                Products
              </Link>
              <Link className="navbar-item" to="/blog">
                Blog
              </Link>
              <Link className="navbar-item" to="/about">
                About
              </Link>
              <Link className="navbar-item" to="/contact">
                Contact
              </Link>
            </div>
            <div className="navbar-end has-text-centered">
              <a
                className="navbar-item"
                href="https://github.com/hi1t0/"
                target="_blank"
                rel="noopener noreferrer"
              >
                <span className="icon">
                  <img src={github} alt="Github" />
                </span>
              </a>
            </div>
          </div>
        </div>
      </nav>
    );
  }
};

export default Navbar;

import React, { useState } from "react";
import { Link } from "gatsby";
import github from "../img/github-icon.svg";
import logo from "../img/logo.svg";

import { useScrollPosition } from '@n8tb1t/use-scroll-position';

const headerStyleVisible = {
  visible: "visible",
  transition: "all 200ms ease-in",
  transform: "none",
  position: "fixed",
  width: "100%",
}

const headerStyleHidden = {
  visible: "hidden",
  transition: "all 200ms ease-out",
  transform: "translate(0, -100%)",
  position: "fixed",
  width: "100%",
}

const Navbar = () => {
  const [active, setActive] = useState(false)
  const [navBarActiveClass, setNavBarActiveClass] = useState("")

  const [showMenu, setShowMenu] = useState(true);

  useScrollPosition(({ prevPos, currPos }) => {
    const visible = currPos.y > prevPos.y;
    setShowMenu(visible);
  }, []);

  const toggleHamburger = () => {
    // toggle the active boolean in the state
    setActive(!active)
    // set the class in state for the navbar accordingly
    if (active) setNavBarActiveClass("is-active")
    else setNavBarActiveClass("")
  }

  return (
    <nav
      style={showMenu ? headerStyleVisible : headerStyleHidden}
      className="navbar is-transparent"
      role="navigation"
      aria-label="main-navigation"
    >
      <div className="container">
        <div className="navbar-brand">
          <Link to="/" className="navbar-item" title="Logo">
            <img src={logo} alt="hi1t0" style={{ width: "88px" }} />
          </Link>
          <Link className="navbar-item" to="/cart">
            Cart
          </Link>
          {/* Hamburger menu */}
          <div
            className={`navbar-burger burger ${navBarActiveClass}`}
            data-target="navMenu"
            role="menuitem"
            tabIndex={0}
            onKeyPress={() => toggleHamburger()}
            onClick={() => toggleHamburger()}
          >
            <span />
            <span />
            <span />
          </div>
        </div>
        <div
          id="navMenu"
          className={`navbar-menu ${navBarActiveClass}`}
        >
          <div className="navbar-start has-text-centered">
            <Link className="navbar-item" to="/products">
              Products
            </Link>
            <Link className="navbar-item" to="/blog">
              Blog
            </Link>
            <Link className="navbar-item" to="/about">
              About
            </Link>
            <Link className="navbar-item" to="/contact">
              Contact
            </Link>
          </div>
          <div className="navbar-end has-text-centered">
            <a
              className="navbar-item"
              href="https://github.com/hi1t0/"
              target="_blank"
              rel="noopener noreferrer"
            >
              <span className="icon">
                <img src={github} alt="Github" />
              </span>
            </a>
          </div>
        </div>
      </div>
    </nav>
  )
}

export default Navbar