automatic image slider in html css javascript code example

Example 1: html auto slideshow

<html>
  <head>
    <style>
      #slider {
        width: 100%;
        height: 100%;

        margin: 0 auto;
        border: 10px solid transparent;
        padding: 0px;

        z-index: 100;
        overflow: hidden;
        white-space: nowrap;
        box-sizing: border-box;
      }
      #slider > li {
        width: 100%;
        height: 100%;

        position: relative;
        display: inline-block;
        overflow: hidden;
        font-size: 15px;
        font-size: initial;
        line-height: normal;
        transition: all 0.5s cubic-bezier(0.4, 1.3, 0.65, 1); /* Slide css animation */
        background-size: cover;
        vertical-align: top;
        box-sizing: border-box;
        white-space: normal;
      }
    </style>
  </head>
  <body>
    <ul id="slider">
      <li>
          <p>Some content.</p>
      </li>
      <li>
          <p>Some more content.</p>
      </li>
      <li>
        <p>And here's space for more.</p>
      </li>
    </ul>
    <script>
      // Slide every slideDelay seconds
      const slideDelay = 3000;

      const dynamicSlider = document.getElementById("slider");

      var curSlide = 0;
      window.setInterval(()=>{
        curSlide++;
        if (curSlide === dynamicSlider.childElementCount) {
          curSlide = 0;
        }

        // Actual slide
        dynamicSlider.firstElementChild.style.setProperty("margin-left", "-" + curSlide + "00%");
      }, slideDelay);

    </script>
  </body>
</html>

Example 2: custom image slider javascript

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
   * {
      box-sizing: border-box;
   }
   .Slide {
      display: none;
   }
   img {
      vertical-align: middle;
      width: 100%;
      height: 400px;
   }
   .slideContainer {
      max-width: 600px;
      position: relative;
      margin: auto;
   }
   .prevBtn,
   .nextBtn {
      position: absolute;
      top: 50%;
      width: auto;
      padding: 10px;
      background-color: rgb(255, 255, 75);
      color: rgb(50, 0, 116);
      font-weight: bolder;
      font-size: 18px;
   }
   .nextBtn {
      right: 0;
   }
   .Caption {
      color: #fbff09;
      font-weight: bold;
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
      font-size: 25px;
      padding: 8px 12px;
      position: absolute;
      bottom: 8px;
      width: 100%;
      text-align: center;
   }
   .Navdot {
      cursor: pointer;
      height: 15px;
      width: 15px;
      margin: 0 2px;
      background-color: rgb(54, 5, 117);
      border-radius: 50%;
      display: inline-block;
      transition: background-color 0.6s ease;
   }
   .selected,
   .Navdot:hover {
      background-color: #d9ff00;
   }
   @media only screen and (max-width: 450px) {
      .prevBtn,
      .nextBtn,
      .Caption {
         font-size: 16px;
      }
   }
</style>
</head>
<body>
<div class="slideContainer">
<div class="Slide">
<img src="https://images.pexels.com/photos/3540375/pexels-photo-3540375.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" />
<div class="Caption">Photo 1</div>
</div>
<div class="Slide">
<img src="https://images.unsplash.com/photo-1558981001-5864b3250a69?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=750&q=80" />
<div class="Caption">Photo 2</div>
</div>
<div class="Slide">
<img src="https://images.unsplash.com/photo-1584910758141-f7993f9e203d?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=667&q=80" />
<div class="Caption">Photo 3</div>
</div>
<a class="prevBtn">❮</a>
<a class="nextBtn">❯</a>
</div>
<br />
<div style="text-align:center">
<span class="Navdot" onclick="currentSlide(1)"></span>
<span class="Navdot" onclick="currentSlide(2)"></span>
<span class="Navdot" onclick="currentSlide(3)"></span>
</div>
<script>
   document.querySelector(".prevBtn").addEventListener("click", () => {
      changeSlides(-1);
   });
   document.querySelector(".nextBtn").addEventListener("click", () => {
      changeSlides(1);
   });
   var slideIndex = 1;
   showSlides(slideIndex);
   function changeSlides(n) {
      showSlides((slideIndex += n));
   }
   function currentSlide(n) {
      showSlides((slideIndex = n));
   }
   function showSlides(n) {
      var i;
      var slides = document.getElementsByClassName("Slide");
      var dots = document.getElementsByClassName("Navdot");
      if (n > slides.length) {
         slideIndex = 1;
      }
      if (n < 1) {
         slideIndex = slides.length;
      }
      Array.from(slides).forEach(item => (item.style.display = "none"));
      Array.from(dots).forEach(
         item => (item.className = item.className.replace(" selected", ""))
      );
      slides[slideIndex - 1].style.display = "block";
      dots[slideIndex - 1].className += " selected";
   }
</script>
</body>
</html>

Example 3: automatic slideshow in html

<!--automatic slidshow-->

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box;}
body {font-family: Verdana, sans-serif;}
.mySlides {display: none;}
img {vertical-align: middle;}

/* Slideshow container */
.slideshow-container {
  max-width: 1000px;
  position: relative;
  margin: auto;
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
  color: #f2f2f2;
  font-size: 12px;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* The dots/bullets/indicators */
.dot {
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active {
  background-color: #717171;
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  animation-name: fade;
  animation-duration: 1.5s;
}

@-webkit-keyframes fade {
  from {opacity: .4} 
  to {opacity: 1}
}

@keyframes fade {
  from {opacity: .4} 
  to {opacity: 1}
}

/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
  .text {font-size: 11px}
}
</style>
</head>
<body>

<h2>Automatic Slideshow</h2>
<p>Change image every 2 seconds:</p>

<div class="slideshow-container">

<div class="mySlides fade">
  <div class="numbertext">1 / 3</div>
  <img src="img_nature_wide.jpg" style="width:100%">
  <div class="text">Caption Text</div>
</div>

<div class="mySlides fade">
  <div class="numbertext">2 / 3</div>
  <img src="img_snow_wide.jpg" style="width:100%">
  <div class="text">Caption Two</div>
</div>

<div class="mySlides fade">
  <div class="numbertext">3 / 3</div>
  <img src="img_mountains_wide.jpg" style="width:100%">
  <div class="text">Caption Three</div>
</div>

</div>
<br>

<div style="text-align:center">
  <span class="dot"></span> 
  <span class="dot"></span> 
  <span class="dot"></span> 
</div>

<script>
var slideIndex = 0;
showSlides();

function showSlides() {
  var i;
  var slides = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("dot");
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";  
  }
  slideIndex++;
  if (slideIndex > slides.length) {slideIndex = 1}    
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" active", "");
  }
  slides[slideIndex-1].style.display = "block";  
  dots[slideIndex-1].className += " active";
  setTimeout(showSlides, 2000); // Change image every 2 seconds
}
</script>

</body>
</html>

Example 4: how to place an automatic slideshow on a page in html css

best slide show in html,css whit position

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