script.js

const hamburger = document.querySelector(".hamburger");
const navMenu = document.querySelector(".nav-menu");

hamburger.addEventListener("click", mobileMenu);

function mobileMenu() {
    hamburger.classList.toggle("active");
    navMenu.classList.toggle("active");
}
// for Image Gallery

var slideIndex = 1;
showSlides(slideIndex);

function plusSlides(n) {
    showSlides((slideIndex += n));
}

function currentSlide(n) {
    showSlides((slideIndex = n));
}

function showSlides(n) {
    var i;
    var slides = document.getElementsByClassName("galleryimage");
    var dots = document.getElementsByClassName("demo");
    var captionText = document.getElementById("caption");
    if (n > slides.length) {
        slideIndex = 1;
    }
    if (n < 1) {
        slideIndex = slides.length;
    }
    for (i = 0; i < slides.length; i++) {
        slides[i].style.display = "none";
    }
    for (i = 0; i < dots.length; i++) {
        dots[i].className = dots[i].className.replace(" active", "");
    }
    slides[slideIndex - 1].style.display = "block";
    dots[slideIndex - 1].className += " active";
    captionText.innerHTML = dots[slideIndex - 1].alt;
}