Slider-Animationen

Question

Ich habe eine Frage. Wie kann dieser Schieberegler in einer Schleife bewegt werden und wie kann dieser Schieberegler nach Erreichen der letzten Folie mit derselben Geschwindigkeit rückwärts bewegt werden, mit der er sich vorwärts bewegt?

$(function(){ var width = '100vw'; var speed = 1500; var pause = 3000; var current = 1; var $slider = $('.slider'); var $slides = $slider.find('.slides'); var $slide = $slides.find('.slide'); var leftAnnime = '-='+width; setInterval(function(){ $slides.animate({'margin-left': leftAnnime }, speed, function(){
            current++;
            if( current == $slide.length ) {
              leftAnnime = 0;
              current = 0;
            } else {
              leftAnnime = '-='+width;
            }
        });
    }, pause);

});

.slider {
    width: 100%;
    height:auto;
    text-align: center;
    overflow: hidden;
  }
  .slides {
    display: flex;
    overflow-x: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    /*
    scroll-snap-points-x: repeat(300px);
    scroll-snap-type: mandatory;
    */
  }
  .slides::-webkit-scrollbar {
    width: 1px;
    height: 10px;
  }
  .slides::-webkit-scrollbar-thumb {
    background: #bbb;
  }
  .slides::-webkit-scrollbar-track {
    background: transparent;
  }
  .slides > div {
    scroll-snap-align: start;
    flex-shrink: 0;
    width: 100vw;
    height: 100vh;
    background: #eee;
    transform-origin: center center;
    transform: scale(1);
    transition: transform 0.5s;
    position: relative; 
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 100px;
  }
  .slides > div:target {
  /*   transform: scale(0.8); */
  }
  .author-info {
    background: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 0.75rem;
    text-align: center;
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    margin: 0;
  }
  .author-info a {
    color: white;
  }
  img {
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
  .slider > a {
    display: inline-flex;
    width: 1.5rem;
    height: 1.5rem;
    background: white;
    text-decoration: none;
    align-items: center;
    justify-content: center;
    margin: 0 0 0.5rem 0;
    position: relative;
    border:1px solid green;
  }
  .slider > a:active {
    top: 1px;
  }
  .slider > a:focus {
    background: #666;
  }
  /* Don't need button navigation */
  @supports (scroll-snap-type) {
    .slider > a {
      display: none;
    }
  }

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slider">  
  <div class="slides">
    <div id="slide-1" class="slide">Slide 1</div>
    <div id="slide-2" class="slide">Slide 2</div>
    <div id="slide-3" class="slide">Slide 3</div>
    <div id="slide-4" class="slide">Slide 4</div>
    <div id="slide-5" class="slide">Slide 5</div>
   </div>
</div>

Answer 1

Dies könnte einfach sein, nur eine Variable verwenden Richtung zu überprüfen für Sie gleiten, ein dann zwischen plus oder minusfür die leftBreitenrichtung

siehe unten Arbeitsausschnitt:

$(function(){ var width = '100vw'; var speed = 1500; var pause = 3000; var current = 1; var $slider = $('.slider'); var $slides = $slider.find('.slides'); var $slide = $slides.find('.slide'); var leftMargin = '-='+width; var direction = "left"; setInterval(function(){ $slides.animate({'margin-left': leftMargin }, speed, function(){
            direction === "left" ? current++ : current--;
            if(current == $slide.length){
                direction = "right"
                leftMargin = '+='+width
            }
            else if (current == 1){
               direction = "left";
               leftMargin = '-='+width
            }
        });
    }, pause);

});

.slider {
    width: 100%;
    height:auto;
    text-align: center;
    overflow: hidden;
  }
  .slides {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    /*
    scroll-snap-points-x: repeat(300px);
    scroll-snap-type: mandatory;
    */
  }
  .slides::-webkit-scrollbar {
    width: 1px;
    height: 10px;
  }
  .slides::-webkit-scrollbar-thumb {
    background: #bbb;
  }
  .slides::-webkit-scrollbar-track {
    background: transparent;
  }
  .slides > div {
    scroll-snap-align: start;
    flex-shrink: 0;
    width: 100vw;
    height: 100vh;
    background: #eee;
    transform-origin: center center;
    transform: scale(1);
    transition: transform 0.5s;
    position: relative; 
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 100px;
  }
  .slides > div:target {
  /*   transform: scale(0.8); */
  }
  .author-info {
    background: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 0.75rem;
    text-align: center;
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    margin: 0;
  }
  .author-info a {
    color: white;
  }
  img {
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
  .slider > a {
    display: inline-flex;
    width: 1.5rem;
    height: 1.5rem;
    background: white;
    text-decoration: none;
    align-items: center;
    justify-content: center;
    margin: 0 0 0.5rem 0;
    position: relative;
    border:1px solid green;
  }
  .slider > a:active {
    top: 1px;
  }
  .slider > a:focus {
    background: #666;
  }
  /* Don't need button navigation */
  @supports (scroll-snap-type) {
    .slider > a {
      display: none;
    }
  }

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slider">  
  <div class="slides">
    <div id="slide-1" class="slide">Slide 1</div>
    <div id="slide-2" class="slide">Slide 2</div>
    <div id="slide-3" class="slide">Slide 3</div>
    <div id="slide-4" class="slide">Slide 4</div>
    <div id="slide-5" class="slide">Slide 5</div>
   </div>
</div>