Animated Custom Slider using HTML, CSS and JS

Are you ready to take your web development skills up a notch? In this exciting tutorial, we'll guide you through the process of creating a stunning animated custom slider from scratch using HTML, CSS, and JavaScript. Sliders are not only visually appealing but also a great way to showcase content in an interactive and engaging manner.

Follow these steps to get cool looking slider. Let's deep dive in:

HTML

First, we need to create a container for our slider. Inside this container, we will create a div for each slide.

<div class="container">
  <div class="slide left-slide slide1">1</div>
  <div class="slide center-slide slide2">2</div>
  <div class="slide right-slide slide3">3</div>
</div>

<div class="buttons">
  <button onclick="moveLeft()">Left</button>
  <button onclick="moveRight()">Right</button>
</div>

We also need to create two buttons for moving the slides left and right.

CSS

Next, we need to style our slider. We will use CSS Grid to create a grid layout for our slider. We will also use CSS variables to store the width of each slide.

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100%;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  position: relative;
  width: 300px;
  height: 400px;
  border-radius: 10px;
}

.slide {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  color: white;
  font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
}

.slide1 {
  background-color: #f1c40f;
}

.slide2 {
  background-color: #e74c3c;
}

.slide3 {
  background-color: #3498db;
}

.left-slide {
  left: 8%;
  top: 10%;
  z-index: 20;
  scale: 0.8;
}

.center-slide {
  left: 50%;
  top: 50%;
  z-index: 30;
  scale: 1;
}

.right-slide {
  left: 70%;
  top: 70%;
  z-index: 20;
  scale: 0.6;
}

.buttons {
  position: absolute;
  bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

button {
  background-color: black;
  color: white;
  padding: 10px 20px;
  border-radius: 6px;
  border: none;
  outline: none;
}

JavaScript

We will change the properties of the slides by changing their classes (left-slide, center-slide, right-slide) using JavaScript.

<script>
const slides = document.querySelectorAll('.slide');

function moveLeft() {
  slides.forEach((slide) => {
    if (slide.classList.contains("left-slide")) {
      slide.classList.replace("left-slide", "right-slide");
      slide.style.transition = 'all 0.4s ease-in-out';
    } else if (slide.classList.contains("center-slide")) {
      slide.classList.replace("center-slide", "left-slide");
      slide.style.transition = 'all 0.3s ease-in-out';
    } else if (slide.classList.contains("right-slide")) {
      slide.classList.replace("right-slide", "center-slide");
      slide.style.transition = 'all 0.2s ease-in-out';
    }
  });
}

function moveRight() {
  slides.forEach((slide) => {
    if (slide.classList.contains("left-slide")) {
      slide.classList.replace("left-slide", "center-slide");
      slide.style.transition = 'all 0.2s ease-in-out';
    } else if (slide.classList.contains("center-slide")) {
      slide.classList.replace("center-slide", "right-slide");
      slide.style.transition = 'all 0.3s ease-in-out';
    } else if (slide.classList.contains("right-slide")) {
      slide.classList.replace("right-slide", "left-slide");
      slide.style.transition = 'all 0.4s ease-in-out';
    }
  });
}
</script>