Modern Filterable Gallery With Image Lightbox

A modern, responsive, filterable photo gallery with pretty nice hover & lightbox effects.

How to use it:

1. Add your images to the gallery and categorize them using CSS classes.

<section id="gallery">
  <div class="container">
    <!-- Filterable Controls -->
    <ul class="gallery_tabs">
      <li class="active" data-filter="all">All</li>
      <li data-filter="camera">Cameras</li>
      <li data-filter="laptop">Laptops</li>
      <li data-filter="mobile">Mobiles</li>
      <li data-filter="headphone">Headphones</li>
    </ul>
    <div class="gallery_wrapper">
      <div class="gallery_item camera">
        <img src="1.jpg" alt="img">
      </div>
      <div class="gallery_item headphone">
        <img src="2.jpg" alt="img">
      </div>
      <div class="gallery_item laptop">
        <img src="3.jpg" alt="img">
      </div>
      <div class="gallery_item mobile">
        <img src="4.jpg" alt="img">
      </div>
    </div>
    <!-- Lightbox -->
    <div class="lightbox">
      <div class="lightbox_wrapper">
        <div class="lightbox_content">
          <img src="" class="lightbox_img" alt="lightbox-img">
        </div>
      </div>
      <div class="lightbox_close">
        <span></span>
        <span></span>
      </div>
    </div>
  </div>
</section>

2. The necessary CSS styles for the gallery & lightbox.

/*--====== Global Variables ======--*/
:root {
  --bg-color: #e0e2fc;
  --main-color: #4C57D5;
  --box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}
/*--====== CSS Reset ======--*/
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--bg-color);
}
img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  vertical-align: middle;
}
ul {
  list-style: none;
}
.overflow_hide {
  overflow: hidden;
}
/*--====== Gallery Section ======--*/
#gallery {
  padding-top: 2rem;
  padding-bottom: 2rem;
}
.container {
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}
/* Filterable Gallery */
.gallery_tabs {
  background-color: inherit;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-evenly;
  row-gap: 0.8rem;
  padding: 1.2rem;
  border-radius: 50px;
  box-shadow: var(--box-shadow);
}
.gallery_tabs li {
  padding: 0.7rem 2rem;
  border-radius: 50px;
  font-size: 0.95rem;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
}
.gallery_tabs li.active,
.gallery_tabs li:hover {
  background-color: var(--main-color);
  color: #fff;
}
.gallery_wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 4rem;
}
@media (max-width: 768px) {
  .gallery_wrapper {
      grid-template-columns: repeat(3, 1fr);
      gap: 0.5rem;
  }
}
.gallery_item {
  border-radius: 10px;
  cursor: pointer;
  overflow: hidden;
}
/* when the gallery_item has 'show' class */
.gallery_item.show {
  animation: fadeIn 0.4s ease-in;
}
@keyframes fadeIn {
  0% {
      opacity: 0;
  }
  100% {
      opacity: 1;
  }
}
/* when the gallery_item has 'hide' class */
.gallery_item.hide {
  display: none;
}
.gallery_item img {
  transition: transform 0.3s ease;
}
.gallery_item:hover img {
  transform: scale(1.1);
}
/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 995;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  overflow-x: hidden;
  overflow-y: auto;
  pointer-events: none;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.3s ease, opacity 0.3s ease;
}
/* when the lightbox is open */
.lightbox.open {
  pointer-events: all;
  visibility: visible;
  opacity: 1;
}
.lightbox_wrapper {
  display: grid;
  place-items: center;
  min-height: calc(100% - 3rem);
  margin: 1.5rem;
}
@media (max-width: 575.98px) {
  .lightbox_wrapper {
      margin: 0.5rem;
      min-height: calc(100% - 1rem);
  }
}
.lightbox_content {
  box-shadow: var(--box-shadow);
  max-width: 700px;
  width: 100%;
  border-radius: 10px;
  text-align: center;
  overflow: hidden;
  transform: scale(0);
  transition: transform 0.5s ease;
}
/* when Lightbox is open then lightbox-content will... */
.lightbox.open .lightbox_content {
  transform: scale(1);
}
/* lightbox-close-btn */
.lightbox_close {
  position: absolute;
  top: 3vh;
  right: 3vw;
  z-index: 999;
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
}
.lightbox_close span {
  width: 100%;
  height: 3px;
  margin-top: -1.5px;
  margin-bottom: -1.5px;
  background-color: #ddd;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}
.lightbox_close:hover span {
  opacity: 1;
}
.lightbox_close span:first-child {
  transform: rotate(45deg);
}
.lightbox_close span:last-child {
  transform: rotate(-45deg);
}

3. Enable the filter gallery and image lightbox.

/*===== Filterable Gallery with Lightbox ---=====*/
const body = document.body;
const galleryTabs = document.querySelectorAll('.gallery_tabs li');
const galleryItems = document.querySelectorAll('.gallery_item');
const galleryImgs = document.querySelectorAll('.gallery_item img');
const lightbox = document.querySelector('.lightbox');
const lightboxImg = document.querySelector('.lightbox_img');
const lightboxCloseBtn = document.querySelector('.lightbox_close');
/*===== Gallery Filtering functionality =====*/
galleryTabs.forEach((currTab) => {
  currTab.addEventListener('click', (e) => {
    // removing the existing 'active' class from the tabs.
    e.target.parentElement.querySelector('.active').classList.remove('active');
    // adding the 'active' class to the currently clicked tab.
    e.target.classList.add('active');
    let filterValue = e.target.getAttribute('data-filter');
    galleryItems.forEach((currItem) => {
      if (filterValue === 'all' || currItem.classList.contains(filterValue)) {
        currItem.classList.remove('hide');
        currItem.classList.add('show');
      }
      else {
        currItem.classList.remove('show');
        currItem.classList.add('hide');
      }
    });
  });
});
/*===== Lightbox functionality =====*/
galleryImgs.forEach((currImg) => {
  currImg.addEventListener('click', (e) => {
    let imgSrc = e.target.getAttribute('src');
    lightboxImg.setAttribute('src', imgSrc);
    lightbox.classList.add('open');
    body.classList.add('overflow_hide');
  });
});
// Function for closing the Lightbox
const lightboxClose = () => {
  lightbox.classList.remove('open');
  body.classList.remove('overflow_hide');
};
// closing the lightbox on clicking the lightboxClose btn.
lightboxCloseBtn.addEventListener('click', lightboxClose);
// closing the lightbox on clicking outside of it.
window.addEventListener('click', (e) => {
  if (e.target.className === 'lightbox_wrapper') {
    lightboxClose();
  }
});
// closing the lightbox on pressing the Escape key.
window.addEventListener('keydown', (e) => {
  if (e.key === 'Escape') {
    lightboxClose();
  }
});