Question

我得到了这个工作，但我无法弄清楚如何只在移动屏幕上显示1项而不是3项。

我不认为这是一个html / css问题，而是javascript问题。但是，我无法弄清楚如何在javascript中使用相当弱的东西。在桌面上，我希望现在看到3个项目，但在手机中，我想一次只显示1个项目。

HTML

<div class="container">
  <h1>Use Bootstrap's carousel to show multiple items per slide.</h1>
  <div class="row">
    <div class="col-md-12">
      <div class="carousel slide multi-item-carousel" id="theCarousel">
        <div class="carousel-inner">
          <div class="item active">
            <div class="col-sm-4 col-xs-12"><a href="#1"><img src="http://placehold.it/300/f44336/000000" class="img-responsive"></a></div>
          </div>
          <div class="item">
            <div class="col-sm-4 col-xs-12"><a href="#1"><img src="http://placehold.it/300/e91e63/000000" class="img-responsive"></a></div>
          </div>
          <div class="item">
            <div class="col-sm-4 col-xs-12"><a href="#1"><img src="http://placehold.it/300/9c27b0/000000" class="img-responsive"></a></div>
          </div>
          <div class="item">
            <div class="col-sm-4 col-xs-12"><a href="#1"><img src="http://placehold.it/300/673ab7/000000" class="img-responsive"></a></div>
          </div>
          <div class="item">
            <div class="col-sm-4 col-xs-12"><a href="#1"><img src="http://placehold.it/300/4caf50/000000" class="img-responsive"></a></div>
          </div>
          <div class="item">
            <div class="col-sm-4 col-xs-12"><a href="#1"><img src="http://placehold.it/300/8bc34a/000000" class="img-responsive"></a></div>
          </div>
          <!-- add  more items here -->
          <!-- Example item start:  -->

          <div class="item">
            <div class="col-sm-4 col-xs-12"><a href="#1"><img src="http://placehold.it/300/8bc34a/000000" class="img-responsive"></a></div>
          </div>

          <!--  Example item end -->
        </div>
        <a class="left carousel-control" href="#theCarousel" data-slide="prev"><i class="glyphicon glyphicon-chevron-left"></i></a>
        <a class="right carousel-control" href="#theCarousel" data-slide="next"><i class="glyphicon glyphicon-chevron-right"></i></a>
      </div>
    </div>
  </div>
</div>

CSS

.multi-item-carousel .carousel-inner > .item {
  transition: 500ms ease-in-out left;
}
.multi-item-carousel .carousel-inner .active.left {
  left: -33%;
}
.multi-item-carousel .carousel-inner .active.right {
  left: 33%;
}
.multi-item-carousel .carousel-inner .next {
  left: 33%;
}
.multi-item-carousel .carousel-inner .prev {
  left: -33%;
}
@media all and (transform-3d), (-webkit-transform-3d) {
  .multi-item-carousel .carousel-inner > .item {
    transition: 500ms ease-in-out left;
    transition: 500ms ease-in-out all;
    backface-visibility: visible;
    transform: none !important;
  }
}
.multi-item-carousel .carouse-control.left, .multi-item-carousel .carouse-control.right {
  background-image: none;
}

jQuery的：

// Instantiate the Bootstrap carousel
$('.multi-item-carousel').carousel({
  interval: false
});

// for every slide in carousel, copy the next slide's item in the slide.
// Do the same for the next, next item.
$('.multi-item-carousel .item').each(function(){
  var next = $(this).next();
  if (!next.length) {
    next = $(this).siblings(':first');
  }
  next.children(':first-child').clone().appendTo($(this));

  if (next.next().length>0) {
    next.next().children(':first-child').clone().appendTo($(this));
  } else {
    $(this).siblings(':first').children(':first-child').clone().appendTo($(this));
  }
});

Answer 1

我不太确定我理解你在JS代码中想要实现的目标，但是这一方式：

 $('.multi-item-carousel .item').each(function(){
// check the screen width
var width = (window.innerWidth > 0) ? window.innerWidth : screen.width;
      // console.log(width);
      if (width > 960) { // do a conditional: if screen width greater than 960px for example
      //following code shows three images per slide
      //without it, its just one image per slide
         var next = $(this).next();
          if (!next.length) {
            next = $(this).siblings(':first');
          }
          next.children(':first-child').clone().appendTo($(this));

          if (next.next().length>0) {
            next.next().children(':first-child').clone().appendTo($(this));
          } else {
            $(this).siblings(':first').children(':first-child').clone().appendTo($(this));
          } 
    }   
});

您的代码并未明确表明您是如何或为何要从其他幻灯片中挑选项目并将其插入指定的幻灯片中。但是，此代码可确保移动设备上每张幻灯片一个项目（特定屏幕宽度）

主要的用处是利用窗口对象来检查宽度并相应地调整旋转木马代码：

 var width = (window.innerWidth > 0) ? window.innerWidth : screen.width;

CODEPEN

仅在移动设备的Bootstrap Multi Carousel中显示1项

1 个答案: