Horizontal Split Slider In JavaScript – Mega Slider

Mega Slider is a responsive, modern, horizontal, split image slider written with JavaScript and CSS animations.

How to use it:

1. The required HTML structure for the mega slider.

<div class="container">
  <img class="logo" src="images/logo.png" alt="logo">
  <!-- Slide 1 -->
  <div id="slide-1" class="slide-container active">
    <div class="back-top"></div>
    <div class="middle">
      <div class="left-text">
        <h2>01.</h2>
        <span>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt.</span>
      </div>
      <div class="spirit"></div>
      <div class="right-text">
        Spirit<br/>
        of Nature
      </div>
    </div>
    <div class="back-bottom"></div>
  </div>
  <!-- Slide 2 -->
  <div id="slide-2" class="slide-container">
    <div class="back-top"></div>
    <div class="middle">
      <div class="left-text">
        <h2>02.</h2>
        <span>invidunt ut labore et dolore magna aliquyam erat est Lorem ipsum dolor sit amet.</span>
      </div>
      <div class="spirit"></div>
      <div class="right-text">
        Spirit<br/>
        of Space
      </div>
    </div>
    <div class="back-bottom"></div>
  </div>
  <!-- Slide 3 -->
  <div id="slide-3" class="slide-container">
    <div class="back-top"></div>
    <div class="middle">
      <div class="left-text">
        <h2>03.</h2>
        <span>magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum.</span>
      </div>
      <div class="spirit"></div>
      <div class="right-text">
        Spirit<br/>
        of Desert
      </div>
    </div>
    <div class="back-bottom"></div>
  </div>
  <!-- Slide 4 -->
  <div id="slide-4" class="slide-container">
    <div class="back-top"></div>
    <div class="middle">
      <div class="left-text">
        <h2>04.</h2>
        <span>Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</span>
      </div>
      <div class="spirit"></div>
      <div class="right-text">
        Spirit<br/>
        of Forest
      </div>
    </div>
    <div class="back-bottom"></div>
  </div>
  <div class="controller">
    <div id="prev-button" class="button">Back</div>
    <div class="progress">
      <div class="value"></div>
    </div>
    <div id="next-button" class="button">Next</div>
  </div>
</div>

2. Load the needed stylesheets in the document.

<!-- Core Styles -->
<link rel="stylesheet" href="styles/main.css" />
<!-- CSS Animations -->
<link rel="stylesheet" href="styles/animations.css" />

3. The main JavaScript to enable the mega slider.

var currentSlide = 1;
function updateClasses(step) {
  document.getElementById('slide-' + currentSlide).classList.remove('active');
  document.getElementById('slide-' + (currentSlide + step)).classList.add('active');
  document.querySelector('#slide-' + currentSlide + ' .back-top').classList.remove('slide-in-right', 'slide-out-right');
  document.querySelector('#slide-' + currentSlide + ' .back-bottom').classList.remove('slide-in-left', 'slide-out-left');
  document.querySelector('#slide-' + currentSlide + ' .spirit').classList.remove('slide-in-fwd', 'slide-out-bck');
  document.querySelector('#slide-' + (currentSlide + step) + ' .back-top').classList.remove('slide-in-right', 'slide-out-right');
  document.querySelector('#slide-' + (currentSlide + step) + ' .back-bottom').classList.remove('slide-in-left', 'slide-out-left');
  document.querySelector('#slide-' + (currentSlide + step) + ' .spirit').classList.remove('slide-in-fwd', 'slide-out-bck');
  document.querySelector('.value').style.width = ((currentSlide + step) * 25) + '%';
  document.querySelector('#slide-' + currentSlide + ' .back-top').classList.add('slide-out-right');
  document.querySelector('#slide-' + currentSlide + ' .back-bottom').classList.add('slide-out-left');
  window.setTimeout(function() {
      document.querySelector('#slide-' + (currentSlide + step) + ' .back-top').classList.add('slide-in-right');
      document.querySelector('#slide-' + (currentSlide + step) + ' .back-bottom').classList.add('slide-in-left');
      document.querySelector('#slide-' + currentSlide + ' .spirit').classList.add('slide-out-bck');
      document.querySelector('#slide-' + (currentSlide + step) + ' .spirit').classList.add('slide-in-fwd');
      currentSlide = currentSlide + step;
  }, 500);
}
document.getElementById('next-button').addEventListener('click', function() {
  if (currentSlide === 4) return;
  updateClasses(1);
});
document.getElementById('prev-button').addEventListener('click', function() {
  if (currentSlide === 1) return;
  updateClasses(-1);
});