jQuery Slideshow with animation callback












0















I have developed a slideshow using jQuery that will pre-loade the next slide, hold the last one, and make the current slide active which adds a class with a delay.



I predict there could be unnecessary duplication within the next and previous buttons. Are there improvements that can be made to the code, and if so, what would these be?






$(document).ready(function(){

$('.slide:eq(-1)').addClass('last');
$('.slide:first').addClass('active').delay(1250).queue(function(){
$(this).addClass('show-text');
});
$('.slide:eq(1)').addClass('next');

});

// Previous Slide
function prevSlide() {

// Variables
var $prevActive = $('.slide.active');
var $prevSlide = $('.slide').eq(($prevActive.index() - 1) % $('.slide').length);
var $afterPrevSlide = $('.slide').eq(($prevActive.index() - 2) % $('.slide').length);

// Remove previous classes
$prevActive.dequeue();
$('.slide').removeClass('last active show-text next');

// Add the new classes
$prevActive.addClass('next');
$prevSlide.addClass('active').delay(1250).queue(function(){
$(this).addClass('show-text');
});
$afterPrevSlide.addClass('last');

}

// Next Slide
function nextSlide() {

// Variables
var $activeSlide = $('.slide.active');
var $nextSlide = $('.slide').eq(($activeSlide.index() + 1) % $('.slide').length);
var $slideAfterNext = $('.slide').eq(($activeSlide.index() + 2) % $('.slide').length);

// Remove the previous classes
$activeSlide.dequeue();
$('.slide').removeClass('last active show-text next');

// Add the new classes
$activeSlide.addClass('last');
$nextSlide.addClass('active').delay(1250).queue(function(){
$(this).addClass('show-text');
});
$slideAfterNext.addClass('next');

}

$('#prev').click(function(){

prevSlide();

});

$('#next').click(function(){

nextSlide();

});

body {
font-size: 16px;
font-family: 'Heebo', sans-serif;
text-transform: uppercase;
font-weight: 900;
}

/* Slides */
.slide-wrapper {
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
display: flex;
overflow: hidden;
}

.slide {
position: absolute;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
width: 70%;
left: 140%;
z-index: 0;
transition: 1.25s;
box-shadow: -10px 0px 21px -5px rgba(0,0,0,0.5);
}

.slide h2 {
display: none;
color: #fff;
text-shadow: 0px 0px 8px rgba(0,0,0,0.5);
letter-spacing: -2px;
font-size: 3rem;
}

.slide.active.show-text h2 {
display: block;
animation: reveal-text 1.5s forwards;
}

@keyframes reveal-text {
0% { opacity: 0; }
100% { opacity: 1; }
}

#slide1 {
background: linear-gradient(to right, #93EDC7, #1CD8D2);
}

#slide2 {
background: linear-gradient(to right, #4389A2, #5C258D);
}

#slide3 {
background: linear-gradient(to right, #8E54E9, #4776E6);
}

#slide4 {
background: linear-gradient(to right, #F45C43, #EB3349);
}

.slide.last {
left: 0;
z-index: 0;
}

.slide.active {
left: 0;
z-index: 1;
}

.slide.next {
left: 70%;
z-index: 2;
}

/* Buttons */
.button-wrapper {
display: flex;
z-index: 10;
width: 100%;
justify-content: space-between;
align-items: center;
}

.button {
background-color: rgba(0,0,0,0.45);
color: #ddd;
height: 40px;
border: none;
font-weight: bold;
padding: 10px 20px;
transition: 0.3s;
}

.button:hover {
cursor: pointer;
background: rgba(0,0,0,0.85);
color: #fff;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slide-wrapper">
<div id="slide1" class="slide">
<h2>Slide One.</h2>
</div>
<div id="slide2" class="slide">
<h2>Slide Two.</h2>
</div>
<div id="slide3" class="slide">
<h2>Slide Three.</h2>
</div>
<div id="slide4" class="slide">
<h2>Slide Four.</h2>
</div>
<div class="button-wrapper">
<button id="prev" class="button">Prev.</button>
<button id="next" class="button">Next.</button>
</div>
</div>












share|improve this question





























    0















    I have developed a slideshow using jQuery that will pre-loade the next slide, hold the last one, and make the current slide active which adds a class with a delay.



    I predict there could be unnecessary duplication within the next and previous buttons. Are there improvements that can be made to the code, and if so, what would these be?






    $(document).ready(function(){

    $('.slide:eq(-1)').addClass('last');
    $('.slide:first').addClass('active').delay(1250).queue(function(){
    $(this).addClass('show-text');
    });
    $('.slide:eq(1)').addClass('next');

    });

    // Previous Slide
    function prevSlide() {

    // Variables
    var $prevActive = $('.slide.active');
    var $prevSlide = $('.slide').eq(($prevActive.index() - 1) % $('.slide').length);
    var $afterPrevSlide = $('.slide').eq(($prevActive.index() - 2) % $('.slide').length);

    // Remove previous classes
    $prevActive.dequeue();
    $('.slide').removeClass('last active show-text next');

    // Add the new classes
    $prevActive.addClass('next');
    $prevSlide.addClass('active').delay(1250).queue(function(){
    $(this).addClass('show-text');
    });
    $afterPrevSlide.addClass('last');

    }

    // Next Slide
    function nextSlide() {

    // Variables
    var $activeSlide = $('.slide.active');
    var $nextSlide = $('.slide').eq(($activeSlide.index() + 1) % $('.slide').length);
    var $slideAfterNext = $('.slide').eq(($activeSlide.index() + 2) % $('.slide').length);

    // Remove the previous classes
    $activeSlide.dequeue();
    $('.slide').removeClass('last active show-text next');

    // Add the new classes
    $activeSlide.addClass('last');
    $nextSlide.addClass('active').delay(1250).queue(function(){
    $(this).addClass('show-text');
    });
    $slideAfterNext.addClass('next');

    }

    $('#prev').click(function(){

    prevSlide();

    });

    $('#next').click(function(){

    nextSlide();

    });

    body {
    font-size: 16px;
    font-family: 'Heebo', sans-serif;
    text-transform: uppercase;
    font-weight: 900;
    }

    /* Slides */
    .slide-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    display: flex;
    overflow: hidden;
    }

    .slide {
    position: absolute;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 70%;
    left: 140%;
    z-index: 0;
    transition: 1.25s;
    box-shadow: -10px 0px 21px -5px rgba(0,0,0,0.5);
    }

    .slide h2 {
    display: none;
    color: #fff;
    text-shadow: 0px 0px 8px rgba(0,0,0,0.5);
    letter-spacing: -2px;
    font-size: 3rem;
    }

    .slide.active.show-text h2 {
    display: block;
    animation: reveal-text 1.5s forwards;
    }

    @keyframes reveal-text {
    0% { opacity: 0; }
    100% { opacity: 1; }
    }

    #slide1 {
    background: linear-gradient(to right, #93EDC7, #1CD8D2);
    }

    #slide2 {
    background: linear-gradient(to right, #4389A2, #5C258D);
    }

    #slide3 {
    background: linear-gradient(to right, #8E54E9, #4776E6);
    }

    #slide4 {
    background: linear-gradient(to right, #F45C43, #EB3349);
    }

    .slide.last {
    left: 0;
    z-index: 0;
    }

    .slide.active {
    left: 0;
    z-index: 1;
    }

    .slide.next {
    left: 70%;
    z-index: 2;
    }

    /* Buttons */
    .button-wrapper {
    display: flex;
    z-index: 10;
    width: 100%;
    justify-content: space-between;
    align-items: center;
    }

    .button {
    background-color: rgba(0,0,0,0.45);
    color: #ddd;
    height: 40px;
    border: none;
    font-weight: bold;
    padding: 10px 20px;
    transition: 0.3s;
    }

    .button:hover {
    cursor: pointer;
    background: rgba(0,0,0,0.85);
    color: #fff;
    }

    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <div class="slide-wrapper">
    <div id="slide1" class="slide">
    <h2>Slide One.</h2>
    </div>
    <div id="slide2" class="slide">
    <h2>Slide Two.</h2>
    </div>
    <div id="slide3" class="slide">
    <h2>Slide Three.</h2>
    </div>
    <div id="slide4" class="slide">
    <h2>Slide Four.</h2>
    </div>
    <div class="button-wrapper">
    <button id="prev" class="button">Prev.</button>
    <button id="next" class="button">Next.</button>
    </div>
    </div>












    share|improve this question



























      0












      0








      0








      I have developed a slideshow using jQuery that will pre-loade the next slide, hold the last one, and make the current slide active which adds a class with a delay.



      I predict there could be unnecessary duplication within the next and previous buttons. Are there improvements that can be made to the code, and if so, what would these be?






      $(document).ready(function(){

      $('.slide:eq(-1)').addClass('last');
      $('.slide:first').addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $('.slide:eq(1)').addClass('next');

      });

      // Previous Slide
      function prevSlide() {

      // Variables
      var $prevActive = $('.slide.active');
      var $prevSlide = $('.slide').eq(($prevActive.index() - 1) % $('.slide').length);
      var $afterPrevSlide = $('.slide').eq(($prevActive.index() - 2) % $('.slide').length);

      // Remove previous classes
      $prevActive.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $prevActive.addClass('next');
      $prevSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $afterPrevSlide.addClass('last');

      }

      // Next Slide
      function nextSlide() {

      // Variables
      var $activeSlide = $('.slide.active');
      var $nextSlide = $('.slide').eq(($activeSlide.index() + 1) % $('.slide').length);
      var $slideAfterNext = $('.slide').eq(($activeSlide.index() + 2) % $('.slide').length);

      // Remove the previous classes
      $activeSlide.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $activeSlide.addClass('last');
      $nextSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $slideAfterNext.addClass('next');

      }

      $('#prev').click(function(){

      prevSlide();

      });

      $('#next').click(function(){

      nextSlide();

      });

      body {
      font-size: 16px;
      font-family: 'Heebo', sans-serif;
      text-transform: uppercase;
      font-weight: 900;
      }

      /* Slides */
      .slide-wrapper {
      position: absolute;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      display: flex;
      overflow: hidden;
      }

      .slide {
      position: absolute;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      width: 70%;
      left: 140%;
      z-index: 0;
      transition: 1.25s;
      box-shadow: -10px 0px 21px -5px rgba(0,0,0,0.5);
      }

      .slide h2 {
      display: none;
      color: #fff;
      text-shadow: 0px 0px 8px rgba(0,0,0,0.5);
      letter-spacing: -2px;
      font-size: 3rem;
      }

      .slide.active.show-text h2 {
      display: block;
      animation: reveal-text 1.5s forwards;
      }

      @keyframes reveal-text {
      0% { opacity: 0; }
      100% { opacity: 1; }
      }

      #slide1 {
      background: linear-gradient(to right, #93EDC7, #1CD8D2);
      }

      #slide2 {
      background: linear-gradient(to right, #4389A2, #5C258D);
      }

      #slide3 {
      background: linear-gradient(to right, #8E54E9, #4776E6);
      }

      #slide4 {
      background: linear-gradient(to right, #F45C43, #EB3349);
      }

      .slide.last {
      left: 0;
      z-index: 0;
      }

      .slide.active {
      left: 0;
      z-index: 1;
      }

      .slide.next {
      left: 70%;
      z-index: 2;
      }

      /* Buttons */
      .button-wrapper {
      display: flex;
      z-index: 10;
      width: 100%;
      justify-content: space-between;
      align-items: center;
      }

      .button {
      background-color: rgba(0,0,0,0.45);
      color: #ddd;
      height: 40px;
      border: none;
      font-weight: bold;
      padding: 10px 20px;
      transition: 0.3s;
      }

      .button:hover {
      cursor: pointer;
      background: rgba(0,0,0,0.85);
      color: #fff;
      }

      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <div class="slide-wrapper">
      <div id="slide1" class="slide">
      <h2>Slide One.</h2>
      </div>
      <div id="slide2" class="slide">
      <h2>Slide Two.</h2>
      </div>
      <div id="slide3" class="slide">
      <h2>Slide Three.</h2>
      </div>
      <div id="slide4" class="slide">
      <h2>Slide Four.</h2>
      </div>
      <div class="button-wrapper">
      <button id="prev" class="button">Prev.</button>
      <button id="next" class="button">Next.</button>
      </div>
      </div>












      share|improve this question
















      I have developed a slideshow using jQuery that will pre-loade the next slide, hold the last one, and make the current slide active which adds a class with a delay.



      I predict there could be unnecessary duplication within the next and previous buttons. Are there improvements that can be made to the code, and if so, what would these be?






      $(document).ready(function(){

      $('.slide:eq(-1)').addClass('last');
      $('.slide:first').addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $('.slide:eq(1)').addClass('next');

      });

      // Previous Slide
      function prevSlide() {

      // Variables
      var $prevActive = $('.slide.active');
      var $prevSlide = $('.slide').eq(($prevActive.index() - 1) % $('.slide').length);
      var $afterPrevSlide = $('.slide').eq(($prevActive.index() - 2) % $('.slide').length);

      // Remove previous classes
      $prevActive.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $prevActive.addClass('next');
      $prevSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $afterPrevSlide.addClass('last');

      }

      // Next Slide
      function nextSlide() {

      // Variables
      var $activeSlide = $('.slide.active');
      var $nextSlide = $('.slide').eq(($activeSlide.index() + 1) % $('.slide').length);
      var $slideAfterNext = $('.slide').eq(($activeSlide.index() + 2) % $('.slide').length);

      // Remove the previous classes
      $activeSlide.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $activeSlide.addClass('last');
      $nextSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $slideAfterNext.addClass('next');

      }

      $('#prev').click(function(){

      prevSlide();

      });

      $('#next').click(function(){

      nextSlide();

      });

      body {
      font-size: 16px;
      font-family: 'Heebo', sans-serif;
      text-transform: uppercase;
      font-weight: 900;
      }

      /* Slides */
      .slide-wrapper {
      position: absolute;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      display: flex;
      overflow: hidden;
      }

      .slide {
      position: absolute;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      width: 70%;
      left: 140%;
      z-index: 0;
      transition: 1.25s;
      box-shadow: -10px 0px 21px -5px rgba(0,0,0,0.5);
      }

      .slide h2 {
      display: none;
      color: #fff;
      text-shadow: 0px 0px 8px rgba(0,0,0,0.5);
      letter-spacing: -2px;
      font-size: 3rem;
      }

      .slide.active.show-text h2 {
      display: block;
      animation: reveal-text 1.5s forwards;
      }

      @keyframes reveal-text {
      0% { opacity: 0; }
      100% { opacity: 1; }
      }

      #slide1 {
      background: linear-gradient(to right, #93EDC7, #1CD8D2);
      }

      #slide2 {
      background: linear-gradient(to right, #4389A2, #5C258D);
      }

      #slide3 {
      background: linear-gradient(to right, #8E54E9, #4776E6);
      }

      #slide4 {
      background: linear-gradient(to right, #F45C43, #EB3349);
      }

      .slide.last {
      left: 0;
      z-index: 0;
      }

      .slide.active {
      left: 0;
      z-index: 1;
      }

      .slide.next {
      left: 70%;
      z-index: 2;
      }

      /* Buttons */
      .button-wrapper {
      display: flex;
      z-index: 10;
      width: 100%;
      justify-content: space-between;
      align-items: center;
      }

      .button {
      background-color: rgba(0,0,0,0.45);
      color: #ddd;
      height: 40px;
      border: none;
      font-weight: bold;
      padding: 10px 20px;
      transition: 0.3s;
      }

      .button:hover {
      cursor: pointer;
      background: rgba(0,0,0,0.85);
      color: #fff;
      }

      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <div class="slide-wrapper">
      <div id="slide1" class="slide">
      <h2>Slide One.</h2>
      </div>
      <div id="slide2" class="slide">
      <h2>Slide Two.</h2>
      </div>
      <div id="slide3" class="slide">
      <h2>Slide Three.</h2>
      </div>
      <div id="slide4" class="slide">
      <h2>Slide Four.</h2>
      </div>
      <div class="button-wrapper">
      <button id="prev" class="button">Prev.</button>
      <button id="next" class="button">Next.</button>
      </div>
      </div>








      $(document).ready(function(){

      $('.slide:eq(-1)').addClass('last');
      $('.slide:first').addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $('.slide:eq(1)').addClass('next');

      });

      // Previous Slide
      function prevSlide() {

      // Variables
      var $prevActive = $('.slide.active');
      var $prevSlide = $('.slide').eq(($prevActive.index() - 1) % $('.slide').length);
      var $afterPrevSlide = $('.slide').eq(($prevActive.index() - 2) % $('.slide').length);

      // Remove previous classes
      $prevActive.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $prevActive.addClass('next');
      $prevSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $afterPrevSlide.addClass('last');

      }

      // Next Slide
      function nextSlide() {

      // Variables
      var $activeSlide = $('.slide.active');
      var $nextSlide = $('.slide').eq(($activeSlide.index() + 1) % $('.slide').length);
      var $slideAfterNext = $('.slide').eq(($activeSlide.index() + 2) % $('.slide').length);

      // Remove the previous classes
      $activeSlide.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $activeSlide.addClass('last');
      $nextSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $slideAfterNext.addClass('next');

      }

      $('#prev').click(function(){

      prevSlide();

      });

      $('#next').click(function(){

      nextSlide();

      });

      body {
      font-size: 16px;
      font-family: 'Heebo', sans-serif;
      text-transform: uppercase;
      font-weight: 900;
      }

      /* Slides */
      .slide-wrapper {
      position: absolute;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      display: flex;
      overflow: hidden;
      }

      .slide {
      position: absolute;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      width: 70%;
      left: 140%;
      z-index: 0;
      transition: 1.25s;
      box-shadow: -10px 0px 21px -5px rgba(0,0,0,0.5);
      }

      .slide h2 {
      display: none;
      color: #fff;
      text-shadow: 0px 0px 8px rgba(0,0,0,0.5);
      letter-spacing: -2px;
      font-size: 3rem;
      }

      .slide.active.show-text h2 {
      display: block;
      animation: reveal-text 1.5s forwards;
      }

      @keyframes reveal-text {
      0% { opacity: 0; }
      100% { opacity: 1; }
      }

      #slide1 {
      background: linear-gradient(to right, #93EDC7, #1CD8D2);
      }

      #slide2 {
      background: linear-gradient(to right, #4389A2, #5C258D);
      }

      #slide3 {
      background: linear-gradient(to right, #8E54E9, #4776E6);
      }

      #slide4 {
      background: linear-gradient(to right, #F45C43, #EB3349);
      }

      .slide.last {
      left: 0;
      z-index: 0;
      }

      .slide.active {
      left: 0;
      z-index: 1;
      }

      .slide.next {
      left: 70%;
      z-index: 2;
      }

      /* Buttons */
      .button-wrapper {
      display: flex;
      z-index: 10;
      width: 100%;
      justify-content: space-between;
      align-items: center;
      }

      .button {
      background-color: rgba(0,0,0,0.45);
      color: #ddd;
      height: 40px;
      border: none;
      font-weight: bold;
      padding: 10px 20px;
      transition: 0.3s;
      }

      .button:hover {
      cursor: pointer;
      background: rgba(0,0,0,0.85);
      color: #fff;
      }

      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <div class="slide-wrapper">
      <div id="slide1" class="slide">
      <h2>Slide One.</h2>
      </div>
      <div id="slide2" class="slide">
      <h2>Slide Two.</h2>
      </div>
      <div id="slide3" class="slide">
      <h2>Slide Three.</h2>
      </div>
      <div id="slide4" class="slide">
      <h2>Slide Four.</h2>
      </div>
      <div class="button-wrapper">
      <button id="prev" class="button">Prev.</button>
      <button id="next" class="button">Next.</button>
      </div>
      </div>





      $(document).ready(function(){

      $('.slide:eq(-1)').addClass('last');
      $('.slide:first').addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $('.slide:eq(1)').addClass('next');

      });

      // Previous Slide
      function prevSlide() {

      // Variables
      var $prevActive = $('.slide.active');
      var $prevSlide = $('.slide').eq(($prevActive.index() - 1) % $('.slide').length);
      var $afterPrevSlide = $('.slide').eq(($prevActive.index() - 2) % $('.slide').length);

      // Remove previous classes
      $prevActive.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $prevActive.addClass('next');
      $prevSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $afterPrevSlide.addClass('last');

      }

      // Next Slide
      function nextSlide() {

      // Variables
      var $activeSlide = $('.slide.active');
      var $nextSlide = $('.slide').eq(($activeSlide.index() + 1) % $('.slide').length);
      var $slideAfterNext = $('.slide').eq(($activeSlide.index() + 2) % $('.slide').length);

      // Remove the previous classes
      $activeSlide.dequeue();
      $('.slide').removeClass('last active show-text next');

      // Add the new classes
      $activeSlide.addClass('last');
      $nextSlide.addClass('active').delay(1250).queue(function(){
      $(this).addClass('show-text');
      });
      $slideAfterNext.addClass('next');

      }

      $('#prev').click(function(){

      prevSlide();

      });

      $('#next').click(function(){

      nextSlide();

      });

      body {
      font-size: 16px;
      font-family: 'Heebo', sans-serif;
      text-transform: uppercase;
      font-weight: 900;
      }

      /* Slides */
      .slide-wrapper {
      position: absolute;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      display: flex;
      overflow: hidden;
      }

      .slide {
      position: absolute;
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      width: 70%;
      left: 140%;
      z-index: 0;
      transition: 1.25s;
      box-shadow: -10px 0px 21px -5px rgba(0,0,0,0.5);
      }

      .slide h2 {
      display: none;
      color: #fff;
      text-shadow: 0px 0px 8px rgba(0,0,0,0.5);
      letter-spacing: -2px;
      font-size: 3rem;
      }

      .slide.active.show-text h2 {
      display: block;
      animation: reveal-text 1.5s forwards;
      }

      @keyframes reveal-text {
      0% { opacity: 0; }
      100% { opacity: 1; }
      }

      #slide1 {
      background: linear-gradient(to right, #93EDC7, #1CD8D2);
      }

      #slide2 {
      background: linear-gradient(to right, #4389A2, #5C258D);
      }

      #slide3 {
      background: linear-gradient(to right, #8E54E9, #4776E6);
      }

      #slide4 {
      background: linear-gradient(to right, #F45C43, #EB3349);
      }

      .slide.last {
      left: 0;
      z-index: 0;
      }

      .slide.active {
      left: 0;
      z-index: 1;
      }

      .slide.next {
      left: 70%;
      z-index: 2;
      }

      /* Buttons */
      .button-wrapper {
      display: flex;
      z-index: 10;
      width: 100%;
      justify-content: space-between;
      align-items: center;
      }

      .button {
      background-color: rgba(0,0,0,0.45);
      color: #ddd;
      height: 40px;
      border: none;
      font-weight: bold;
      padding: 10px 20px;
      transition: 0.3s;
      }

      .button:hover {
      cursor: pointer;
      background: rgba(0,0,0,0.85);
      color: #fff;
      }

      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <div class="slide-wrapper">
      <div id="slide1" class="slide">
      <h2>Slide One.</h2>
      </div>
      <div id="slide2" class="slide">
      <h2>Slide Two.</h2>
      </div>
      <div id="slide3" class="slide">
      <h2>Slide Three.</h2>
      </div>
      <div id="slide4" class="slide">
      <h2>Slide Four.</h2>
      </div>
      <div class="button-wrapper">
      <button id="prev" class="button">Prev.</button>
      <button id="next" class="button">Next.</button>
      </div>
      </div>






      algorithm jquery






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