How To

Cara Membuat Slideshow Gallery

Belajar cara membuat galeri slideshow responsif dengan CSS dan JavaScript.

Contoh:

<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
  font-family: Arial;
  margin: 0;
}

* {
  box-sizing: border-box;
}

img {
  vertical-align: middle;
}

/* Posisikan wadah gambar (diperlukan untuk memposisikan panah kiri dan kanan) */.container {
  position: relative;
}

/* Sembunyikan gambar secara default */.mySlides {
  display: none;
}

/* Tambahkan penunjuk saat mengarahkan kursor ke gambar mini */.cursor {
  cursor: pointer;
}

/* Tombol Next dan Previous */.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 40%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

/* Posisikan "tombol berikutnya" di sebelah kanan */.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* Saat mengarahkan kursor, tambahkan warna background hitam dengan sedikit tembus pandang */.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

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

/* Wadah untuk teks gambar*/.caption-container {
  text-align: center;
  background-color: #222;
  padding: 2px 16px;
  color: white;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Enam kolom berdampingan */.column {
  float: left;
  width: 16.66%;
}

/* Tambahkan efek transparansi untuk gambar mini */.demo {
  opacity: 0.6;
}

.active,
.demo:hover {
  opacity: 1;
}
</style>
<body>

<h2 style="text-align:center">Slideshow Gallery</h2>

<div class="container">
  <div class="mySlides">
    <div class="numbertext">1 / 6</div>
    <img src="https://dosenit.com/wp-content/uploads/2020/12/img_woods_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">2 / 6</div>
    <img src="https://dosenit.com/wp-content/uploads/2020/12/img_5terre_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">3 / 6</div>
    <img src="https://dosenit.com/wp-content/uploads/2020/12/img_mountains_wide.jpg" style="width:100%">
  </div>
    
  <div class="mySlides">
    <div class="numbertext">4 / 6</div>
    <img src="https://dosenit.com/wp-content/uploads/2020/12/img_lights_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">5 / 6</div>
    <img src="https://dosenit.com/wp-content/uploads/2020/12/img_nature_wide.jpg" style="width:100%">
  </div>
    
  <div class="mySlides">
    <div class="numbertext">6 / 6</div>
    <img src="https://dosenit.com/wp-content/uploads/2020/12/img_snow_wide-1.jpg" style="width:100%">
  </div>
    
  <a class="prev" >and fjords">
    </div>
    <div class="column">
      <img class="demo cursor" src="https://dosenit.com/wp-content/uploads/2020/12/img_lights_wide.jpg" style="width:100%" >var slideIndex = 1;
showSlides(slideIndex);

function plusSlides(n) {
  showSlides(slideIndex += n);
}

function currentSlide(n) {
  showSlides(slideIndex = n);
}

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("demo");
  var captionText = document.getElementById("caption");
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
      slides[i].style.display = "none";
  }
  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";
  captionText.innerHTML = dots[slideIndex-1].alt;
}
</script>
    
</body>
</html>

Membuat Galeri Slideshow

Langkah 1) Tambahkan HTML

Contoh:

 <!-- Wadah untuk galeri gambar -->
<div class="container">

  <!-- Gambar lebar penuh dengan teks angka -->
  <div class="mySlides">
    <div class="numbertext">1 / 6</div>
      <img src="img_woods_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">2 / 6</div>
      <img src="img_5terre_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">3 / 6</div>
      <img src="img_mountains_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">4 / 6</div>
      <img src="img_lights_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">5 / 6</div>
      <img src="img_nature_wide.jpg" style="width:100%">
  </div>

  <div class="mySlides">
    <div class="numbertext">6 / 6</div>
      <img src="img_snow_wide.jpg" style="width:100%">
  </div>

  <!-- Tombol Next dan previous -->
  <a class="prev" >

Langkah 2) Tambahkan CSS

Berikan style pada galeri gambar, tombol next dan previous, teks caption dan dots.

Contoh:

* {
  box-sizing: border-box;
}

/* Posisikan wadah gambar (diperlukan untuk memposisikan panah kiri dan kanan) */.container {
  position: relative;
}

/* Sembunyikan gambar secara default */.mySlides {
  display: none;
}

/* Tambahkan penunjuk saat mengarahkan kursor ke gambar mini */.cursor {
  cursor: pointer;
}

/* Tombol Next dan Previous */.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 40%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-user-select: none;
}

/* Posisikan "tombol berikutnya" di sebelah kanan */.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* Saat mengarahkan kursor, tambahkan warna background hitam dengan sedikit tembus pandang */.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

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

/* Wadah untuk teks gambar*/.caption-container {
  text-align: center;
  background-color: #222;
  padding: 2px 16px;
  color: white;
}

.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Enam kolom berdampingan */.column {
  float: left;
  width: 16.66%;
}

/* Tambahkan efek transparansi untuk gambar mini */.demo {
  opacity: 0.6;
}

.active,
.demo:hover {
  opacity: 1;
}

Langkah 3) Tambahkan JavaScript

Contoh:

var slideIndex = 1;
showSlides(slideIndex);

// Next/previous control
function plusSlides(n) {
  showSlides(slideIndex += n);
}

// Thumbnail image control
function currentSlide(n) {
  showSlides(slideIndex = n);
}

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("demo");
  var captionText = document.getElementById("caption");
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";
  }
  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";
  captionText.innerHTML = dots[slideIndex-1].alt;
}

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