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bootstrap carousel : apply same animation effect on both forward and backward sliding animation

问答 作者：

I have implemented a bootstrap carousel. problem occurs when left arrow is pressed. the animation is different from the forward sliding. I want same animation for both forward and backward sliding. how can I achieve that?

html

<!------ Include the above in your HEAD tag ---------->




<!DOCTYPE html>
<html lang="en">
<head>
    <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>Document</title>
    <link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
    <link rel="stylesheet" href="./ashik.css">
</head>
<body>
    <div class="row myrow">
        <div class="container-fluid">
            <div id="carouselExample" class="carousel slide" data-ride="carousel" data-interval="9000">
                <div class="carousel-inner row myrow w-100 mx-auto" role="listbox">
                    <div class="carousel-item col-md-6 col-lg-4 active">
                       <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 1" class="thumb">
                              <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=1" alt="slide 1">
                            </a>
                          </div>
                        </div>
                    </div>
                    <div class="carousel-item col-md-6 col-lg-4">
                       <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 3" class="thumb">
                             <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=2" alt="slide 2">
                            </a>
                          </div>
                        </div>
                    </div>
                    <div class="carousel-item col-md-6 col-lg-4">
                       <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 4" class="thumb">
                             <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=3" alt="slide 3">
                            </a>
                          </div>
                        </div>
                    </div>
                    <div class="carousel-item col-md-6 col-lg-4">
                        <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 5" class="thumb">
                             <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=4" alt="slide 4">
                            </a>
                          </div>
                        </div>
                    </div>
                    <div class="carousel-item col-md-6 col-lg-4">
                      <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 6" class="thumb">
                              <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=5" alt="slide 5">
                            </a>
                          </div>
                        </div>
                    </div>
                    <div class="carousel-item col-md-6 col-lg-4">
                       <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 7" class="thumb">
                              <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=6" alt="slide 6">
                            </a>
                          </div>
                        </div>
                    </div>
                    <div class="carousel-item col-md-6 col-lg-4">
                       <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 8" class="thumb">
                              <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=7" alt="slide 7">
                            </a>
                          </div>
                        </div>
                    </div>
                     <div class="carousel-item col-md-6 col-lg-4">
                        <div class="panel panel-default">
                          <div class="panel-thumbnail">
                            <a href="#" title="image 2" class="thumb">
                             <img class="img-fluid mx-auto d-block" src="//via.placeholder.com/600x400?text=8" alt="slide 8">
                            </a>
                          </div>
                          
                        </div>
                    </div>
                    
                </div>
                <a class="carousel-control-prev" href="#carouselExample" role="button" data-slide="prev">
                    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
                    <span class="sr-only">Previous</span>
                </a>
                <a class="carousel-control-next text-faded" href="#carouselExample" role="button" data-slide="next">
                    <span class="carousel-control-next-icon" aria-hidden="true"></span>
                    <span class="sr-only">Next</span>
                </a>
            </div>
        </div>
    </div>


<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!-- <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> -->

<script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-Fy6S3B9q64WdZWQUiU+q4/2Lc9npb8tCaSX9FK7E8HnRr0Jz8D6OP9dO5Vg3Q9ct" crossorigin="anonymous"></script>
<script src="./ashik.js"></script>
    
</body>
</html>

css

@media (min-width: 768px) {

    /* show 3 items */
    .carousel-inner .active,
    .carousel-inner .active + .carousel-item,
    .carousel-inner .active + .carousel-item + .carousel-item,
    .carousel-inner .active + .carousel-item + .carousel-item + .carousel-item  {
        display: block;
    }
    
    .carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left),
    .carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left) + .carousel-item,
    .carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left) + .carousel-item + .carousel-item,
    .carousel-inner .carousel-item.active:not(.carousel-item-right):not(.carousel-item-left) + .carousel-item + .carousel-item + .carousel-item {
        transition: none;
    }
    
    .carousel-inner .carousel-item-next,
    .carousel-inner .carousel-item开发者_Go百科-prev {
      position: relative;
      transform: translate3d(0, 0, 0);
    }
    
    .carousel-inner .active.carousel-item + .carousel-item + .carousel-item + .carousel-item + .carousel-item {
        position: absolute;
        top: 0;
        right: -25%;
        z-index: -1;
        display: block;
        visibility: visible;
    }
    
    /* left or forward direction */
    .active.carousel-item-left + .carousel-item-next.carousel-item-left,
    .carousel-item-next.carousel-item-left + .carousel-item,
    .carousel-item-next.carousel-item-left + .carousel-item + .carousel-item,
    .carousel-item-next.carousel-item-left + .carousel-item + .carousel-item + .carousel-item,
    .carousel-item-next.carousel-item-left + .carousel-item + .carousel-item + .carousel-item + .carousel-item {
        position: relative;
        transform: translate3d(-100%, 0, 0);
        visibility: visible;
    }
    
    /* farthest right hidden item must be abso position for animations */
    .carousel-inner .carousel-item-prev.carousel-item-right {
        position: absolute;
        top: 0;
        left: 0;
        z-index: -1;
        display: block;
        visibility: visible;
    }
    
    /* right or prev direction */
    .active.carousel-item-right + .carousel-item-prev.carousel-item-right,
    .carousel-item-prev.carousel-item-right + .carousel-item,
    .carousel-item-prev.carousel-item-right + .carousel-item + .carousel-item,
    .carousel-item-prev.carousel-item-right + .carousel-item + .carousel-item + .carousel-item,
    .carousel-item-prev.carousel-item-right + .carousel-item + .carousel-item + .carousel-item + .carousel-item {
        position: relative;
        transform: translate3d(100%, 0, 0);
        visibility: visible;
        display: block;
        visibility: visible;
    }

}


.row.myrow {
    flex-wrap: nowrap !important;
}

js


$('#carouselExample').on('slide.bs.carousel', function (e) {

  
    var $e = $(e.relatedTarget);
    var idx = $e.index();
    var itemsPerSlide = 4;
    var totalItems = $('.carousel-item').length;
    
    if (idx >= totalItems-(itemsPerSlide-1)) {
        var it = itemsPerSlide - (totalItems - idx);
        console.log({it});
        for (var i=0; i<it; i++) {
            // append slides to end
            if (e.direction=="left") {
                $('.carousel-item').eq(i).appendTo('.carousel-inner');
            }
            else {
                $('.carousel-item').eq(0).appendTo('.carousel-inner');
            }
        }
    }
});


  $('#carouselExample').carousel({ 
                interval: false,
        });


  $(document).ready(function() {
/* show lightbox when clicking a thumbnail */
    $('a.thumb').click(function(event){
      event.preventDefault();
      var content = $('.modal-body');
      content.empty();
        var title = $(this).attr("title");
        $('.modal-title').html(title);        
        content.html($(this).html());
        $(".modal-profile").modal({show:true});
    });

  });

live:

https://bootsnipp.com/snippets/dl6ez

继续阅读：bootstrap-4carouselcssjquery

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