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Image Slider in HTML CSS & JavaScript (source code)

Today in this blog you will learn how to create an Image Slider using HTML CSS & JavaScript. Creating an image slider is an excellent way to enhance your coding skills in HTML, CSS, and JavaScript. Recently I have also created an Image Slider in Swiper Js I hope that post will also be beneficial for you.If you are eager to see a demonstration of this Image Slider and are interested in learning how to create it using HTML CSS & JavaScript.

Required Steps

To create a Image Slider using HTML, CSS, and vanilla JavaScript, follow the given steps line by line:

  1. Create a folder. You can name this folder whatever you want, and inside this folder, create the mentioned files.
  2. Create an index.html file. The file name must be index and its extension .html
  3. Create a style.css file. The file name must be style and its extension .css
  4. Create a script.js file. The file name must be script and its extension .js

Once you create these files, paste the given codes into the specified files. If you don’t want to do these then scroll down and download the source code of this Image Slider by clicking on the given download button.

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Image Slider JavaScript | CodingNepal</title>
    <link rel="stylesheet" href="style.css" />
    <link rel="stylesheet" href="" />
    <script src="script.js" defer></script>
    <section class="wrapper">
      <i class="fa-solid fa-arrow-left button" id="prev"></i>
      <div class="image-container">
        <div class="carousel">
          <img src="images/image1.jpg" alt="" />
          <img src="images/image2.jpg" alt="" />
          <img src="images/image3.jpg" alt="" />
          <img src="images/image4.jpg" alt="" />
        <i class="fa-solid fa-arrow-right button" id="next"></i>

Paste the below code into styles.css

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #343f4f;
.wrapper {
  display: flex;
  max-width: 650px;
  width: 100%;
  height: 400px;
  background: #fff;
  align-items: center;
  justify-content: center;
  position: relative;
  border-radius: 12px;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
.wrapper i.button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  height: 36px;
  width: 36px;
  background-color: #343f4f;
  border-radius: 50%;
  text-align: center;
  line-height: 36px;
  color: #fff;
  font-size: 15px;
  transition: all 0.3s linear;
  z-index: 100;
  cursor: pointer;
i.button:active {
  transform: scale(0.94) translateY(-50%);
i#prev {
  left: 25px;
i#next {
  right: 25px;
.image-container {
  height: 320px;
  max-width: 500px;
  width: 100%;
  overflow: hidden;
.image-container .carousel {
  display: flex;
  height: 100%;
  width: 100%;
  transition: all 0.4s ease;
.carousel img {
  height: 100%;
  width: 100%;
  border-radius: 18px;
  border: 10px solid #fff;
  object-fit: cover;

Paste the below code into script.js file

// Get the DOM elements for the image carousel
const wrapper = document.querySelector(".wrapper"),
  carousel = document.querySelector(".carousel"),
  images = document.querySelectorAll("img"),
  buttons = document.querySelectorAll(".button");

let imageIndex = 1,

// Define function to start automatic image slider
const autoSlide = () => {
  // Start the slideshow by calling slideImage() every 2 seconds
  intervalId = setInterval(() => slideImage(++imageIndex), 2000);
// Call autoSlide function on page load

// A function that updates the carousel display to show the specified image
const slideImage = () => {
  // Calculate the updated image index
  imageIndex = imageIndex === images.length ? 0 : imageIndex < 0 ? images.length - 1 : imageIndex;
  // Update the carousel display to show the specified image = `translate(-${imageIndex * 100}%)`;

// A function that updates the carousel display to show the next or previous image
const updateClick = (e) => {
  // Stop the automatic slideshow
  // Calculate the updated image index based on the button clicked
  imageIndex += === "next" ? 1 : -1;
  // Restart the automatic slideshow

// Add event listeners to the navigation buttons
buttons.forEach((button) => button.addEventListener("click", updateClick));

// Add mouseover event listener to wrapper element to stop auto sliding
wrapper.addEventListener("mouseover", () => clearInterval(intervalId));
// Add mouseleave event listener to wrapper element to start auto sliding again
wrapper.addEventListener("mouseleave", autoSlide);

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