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How to create a Lightbox gallery

Before We Start

A gallery is one of the main components of a website, It contains links to the other sections and a user interface element within a website. The most important one and the first section that the user sees when he/she enters a website.

How to create a Lightbox gallery. So if you are a person who wishes to develop a website, you have to know how to create a gallery properly.

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How to create a gallery ? We are here to solve your problem.
In this article we discuss how to create a gallery. Before we start please read the below articles which easier you to understand the process, if you are new to development.

Step 1 – Add HTML

It’s too easy and simple. Just copy and paste below code in your HTML editor between <body> </body> tag.

<body>
  <div class="row">
  <div class="col">
     <img src="https://source.unsplash.com/random/200" onclick="openLightbox();toSlide(1)" class="hover-shadow preview" alt="" />
  </div>
  <div class="col">
     <img src="https://source.unsplash.com/random/201" onclick="openLightbox();toSlide(2)" class="hover-shadow preview" alt="" />
  </div>
  <div class="col">
     <img src="https://source.unsplash.com/random/202" onclick="openLightbox();toSlide(3)" class="hover-shadow preview" alt="" />
     <img src="https://source.unsplash.com/random/203" onclick="openLightbox();toSlide(4)" class="hover-shadow preview" alt="" />
  </div>
  <div class="col">
     <img src="https://source.unsplash.com/random/204" onclick="openLightbox();toSlide(5)" class="hover-shadow preview" alt="" />
  </div>
  <div class="col">
     <img src="https://source.unsplash.com/random/205" onclick="openLightbox();toSlide(6)" class="hover-shadow preview" alt="" />
  </div>
</div>
     
<div id="Lightbox" class="modal">
  <span class="close pointer" onclick="closeLightbox()">×</span>
  <div class="modal-content">
    <div class="slide">
        <img src="https://source.unsplash.com/random/200" class="image-slide" alt="" />
    </div>
    <div class="slide">
        <img src="https://source.unsplash.com/random/201" class="image-slide" alt="" />
    </div>    
    <div class="slide">
        <img src="https://source.unsplash.com/random/202" class="image-slide" alt="" />
    </div>
     <div class="slide">
        <img src="https://source.unsplash.com/random/203" class="image-slide" alt="" />
    </div>
    <div class="slide">
        <img src="https://source.unsplash.com/random/204" class="image-slide" alt="" />
    </div>    
    <div class="slide">
        <img src="https://source.unsplash.com/random/205" class="image-slide" alt="" />
    </div>
  
    <a class="previous" onclick="changeSlide(-1)">❮</a>
    <a class="next" onclick="changeSlide(1)">❯</a>
  
    <div class="dots">
      <div class="col">
        <img src="https://source.unsplash.com/random/200" class="modal-preview hover-shadow" onclick="toSlide(1)" alt="" />
      </div>
      <div class="col">
        <img src="https://source.unsplash.com/random/201" class="modal-preview hover-shadow" onclick="toSlide(2)" alt="" />
      </div>
      <div class="col">
        <img src="https://source.unsplash.com/random/202" class="modal-preview hover-shadow" onclick="toSlide(3)" alt="" />
      </div>
      <div class="col">
        <img src="https://source.unsplash.com/random/203" class="modal-preview hover-shadow" onclick="toSlide(4)" alt="" />
      </div>
      <div class="col">
        <img src="https://source.unsplash.com/random/204" class="modal-preview hover-shadow" onclick="toSlide(5)" alt="" />
      </div>
      <div class="col">
        <img src="https://source.unsplash.com/random/205" class="modal-preview hover-shadow" onclick="toSlide(6)" alt="" />
      </div>
    </div>
  </div>
</div>
</body>

Step 2 – Add CSS

Copy and paste below code in your HTML editor between <style></style> tag.

<style>
html {
  box-sizing: border-box;
}

*, *:before, *:after {
  box-sizing: inherit;
}

body {
  margin: 0;
}

.preview {
  width: 100%;
}

.row {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  margin: 2rem auto;
  width: 80vw;
}

.row > .col {
  padding: 0 10px;
}

.col {
  float: left; 
  width: 33.3%;
}
   
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  padding: 10px 62px 0px 62px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: black;
}

.modal-content {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin: auto;
  padding: 0 0 0 0;
  width: 80vw;
  max-width: 1000px;
}

.slide {
  display: none;
}

.image-slide {
  width: 100%;
}

.modal-preview {
  width: 100%;
}

.dots {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}


img.preview, img.modal-preview {
  cursor: pointer;
  opacity: 0.7;
}

img.active,
.preview:hover,
.modal-preview:hover {
  opacity: 1;
}

img.hover-shadow {
  transition: 0.3s;
}

.hover-shadow:hover {
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
} 

.close {
  color: white;
  position: absolute;
  top: 10px;
  right: 25px;
  font-size: 35px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: #999;
  text-decoration: none;
  cursor: pointer;
}

.previous,
.next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 24px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

.previous:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}
    </style>

Step 2 – Add JavaScript

We use some external JavaScript link to this code. No need to worry about this, copy and paste below code between <head></head> tag.

<script>
let slideIndex = 1;
    showSlide(slideIndex);
    
    function openLightbox() {
      document.getElementById('Lightbox').style.display = 'block';
    };
    
    function closeLightbox() {
      document.getElementById('Lightbox').style.display = 'none';
    };
    
    function changeSlide(n) {
      showSlide(slideIndex += n);
    };
    
    function toSlide(n) {
      showSlide(slideIndex = n);
    };
    
    function showSlide(n) {
      const slides = document.getElementsByClassName('slide');
      let modalPreviews = document.getElementsByClassName('modal-preview');
    
      if (n > slides.length) {
        slideIndex = 1;	
      };
      
      if (n < 1) {
        slideIndex = slides.length;
      };
    
      for (let i = 0; i < slides.length; i++) {
        slides[i].style.display = "none";
      };
      
      for (let i = 0; i < modalPreviews.length; i++) {
        modalPreviews[i].className = modalPreviews[i].className.replace(' active', '');
      };
      
      slides[slideIndex - 1].style.display = 'block';
      modalPreviews[slideIndex - 1].className += ' active';
    };
</script>

At the end we will have something like this. You can change fonts, colors, backgrounds and all things that you want.Enjoy it.

Code - Lightbox gallery

Video Tutorial

Please watch this video to better understand this tutorial and don’t forget to subscribe to our channel.


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