在水平滑块中延迟加载图像 [英] Lazyloading images in horizontal slider

问题描述

我使用jquery lazyload和一个阈值来暂停加载此站点上的图像： https：// bm-translations。 de /＃leistungen

I am lazyloading the images on this site with jquery lazyload and a treshold: https://bm-translations.de/#leistungen

//Lazyload Images with Threshold https://www.appelsiini.net/projects/lazyload
$(function() {
    $("img.lazy").lazyload({
        threshold : 400
    });
}); 

所以图像 src 被<$替换C $ C>数据原始。当我滚动到元素时，它应该将其更改为 src ，因为它。

So Images src is replaced by data-original. When I scroll to the element it should change it to src, as it.

但出于某种原因它正如您所看到的，加载引导滑块中的图像太慢（当我点击它或它自动滑动时某些图像没有加载）。如何调整此代码，所以它也适用于此？

But out of some reason its loading the images in the bootstrap-slider too slow (when I click to it or its autosliding some images havent loaded), as you can see. How to adjust this code, so its working for this as well?

滑块的结构如下： https://www.w3schools.com/bootstrap/bootstrap_carousel.asp

Carousel JS是：

$('#myCarousel').carousel({
        interval: 9000,
    });

    // handles the carousel buttons
    $('[id^=carousel-selector-]').click( function(){
      var id_selector = $(this).attr("id");
      var id = id_selector.substr(id_selector.length -1);
      id = parseInt(id);
      $('#myCarousel').carousel(id);
      $('[id^=carousel-selector-]').removeClass('selected');
      $(this).addClass('selected');
    });

    // when the carousel slides, auto update
    $('#myCarousel').on('slide.bs.carousel', function (e) {
      var id = $('.item.active').data('slide-number');
      id = parseInt(id)+1;
      $('[id^=carousel-selector-]').removeClass('selected');
      $('[id=carousel-selector-'+id+']').addClass('selected');
    });

我试过这个，但后来又不再滑动了：

$('#myCarousel').carousel({
        interval: 9000,
        scroll: {
            onBefore: function( data ) {
              var $current = data.items.visible.first(),
                  visible = data.items.visible,
                  src = visible.data('src');

              visible.attr('src', src);
            }
        }
    });

如何修复它，所以它在点击/自动滑动之前延迟加载或至少延迟加载带阈值的整个轮播图像？

How to fix it, so its either lazy-loading before click/autoslide or at least to lazyload the whole carousel images with threshold?

推荐答案

我建议您使用 owl.carousel.js 插件。它更好，功能更多。

I suggest you use the "owl.carousel.js" plugin. It is much better and has more features.

$('.owl-carousel').owlCarousel({
    items:1,
    lazyLoad:true,
    loop:true,
    margin:10,
    autoplay:true,
    autoplayTimeout:3000,
    autoplayHoverPause:true,
});

<link href="https://owlcarousel2.github.io/OwlCarousel2/assets/owlcarousel/assets/owl.carousel.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://owlcarousel2.github.io/OwlCarousel2/assets/owlcarousel/owl.carousel.js"></script>
<div class="owl-carousel owl-theme">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=1" data-src-retina="https://placehold.it/350x250&text=1-retina" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=2" data-src-retina="https://placehold.it/350x250&text=2-retina" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=3" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=4" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=5" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=6" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=7" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=8" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=9" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=10" alt="">
    <img class="owl-lazy" data-src="https://placehold.it/350x250&text=11" alt="">
</div>

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