如何使用 jquery 获取 data-src 属性？

Question

实际上我想当我将鼠标悬停在第一张图片上时必须再次出现 我想和你分享我的结构

<div class="tur-list-box">

    <div class="tur-list-content">
        <figure>
          <img data-src="img/assets/tourlist-2.jpg" class="lazy" src="img/assets/placeholder.png" alt="tur sayfası">
          <a href="#" class="figure-overlay">
              <p class="tour-price">
                <span class="price-big">73,</span>
                <span class="price-little">40</span>
                <span class="price-unit">TL*</span>
                <span class="price-block">‘den itibaren</span>
              </p>
          </a>
        </figure><!-- tur resim-->

        <div class="tur-details">
          <h3><a href="#">Hafta Sonu Turları</a></h3>
          <p>15 farklı program</p>
          <i class=" open-tur-toggle fa fa-chevron-down" aria-hidden="true"></i>
        </div><!-- tur detay-->

    </div><!-- tur list content-->

    <div class="tur-list-toggle">
      <ul class="list-unstyled">
        <li><a href="#" data-img="http://cdn.anitur.com.tr/resimler/orta/2016-02/otel_buyuk-abant-oteli_vPYKBnet58y0itPrkpce.jpg">Kakava ( Hıdırellez ) Şenlikleri Alaçatı <i class="fa fa-chevron-right" aria-hidden="true"></i></a></li>
        <li><a href="#" data-img="http://cdn.anitur.com.tr/resimler/orta/2016-10/otel_abant-palace-hotel_FTfyg8HYVB9lNeOUMA76.jpg">Ot Festivali Urla Enginar Festivali Turu <i class="fa fa-chevron-right" aria-hidden="true"></i></a></li>
        <li><a href="#" data-img="http://cdn.anitur.com.tr/resimler/normal/2016-01/tur_adana-portakal-cicegi-karnavali_3eO46CjOg4k34ooQM2mA.jpg">Adana Portakal Çiçeği Karnavalı Isparta <i class="fa fa-chevron-right" aria-hidden="true"></i></a></li>
        <li><a href="#" data-img="http://cdn.anitur.com.tr/resimler/normal/2016-01/tur_isparta-goller-yoresi-gul-hasadi-turu_Ue7lCTZhtuNk6DHTOy5C.jpg">Gül Hasadı Ve Göller Yöresi Turları <i class="fa fa-chevron-right" aria-hidden="true"></i></a></li>
        <li><a href="#" data-img="http://cdn.anitur.com.tr/resimler/normal/2016-03/tur_manisa-mesir-macunu-senligi-turu_ElEY2IdzFOfHLe6do7ja.jpg">Manisa Mesir Macunu Şenliği Turu <i class="fa fa-chevron-right" aria-hidden="true"></i></a></li>
        <li><a href="#" data-img="http://cdn.anitur.com.tr/resimler/normal/2016-01/tur_isparta-goller-yoresi-gul-hasadi-turu_KN8aDpGyF4O6gKABF5d4.jpg">Uçaklı Festival Turları <i class="fa fa-chevron-right" aria-hidden="true"></i></a></li>
      </ul>
    </div><!-- acilir kapanir alan-->

 </div><!-- tur list box-->
<script>
$(".tur-list-box").hover(
    function(){
        $(this).find(".tur-list-toggle").stop().slideDown();
        $(this).find(".open-tur-toggle").stop().removeClass("fa-chevron-down").addClass("fa-chevron-up");
    },
    function(){
        var getDefaultImg = $(this).find("figure img").data(".lazy");
        console.log(getDefaultImg);
        $(this).find(".tur-list-toggle").stop().slideUp();
        $(this).find(".open-tur-toggle").stop().removeClass("fa-chevron-up").addClass("fa-chevron-down");
    }
);

$('.tur-list-toggle ul li a').hover(
    function(e) {
      e.preventDefault();  
      var getAttr = $(this).attr("data-img");
      $(this).parents(".tur-list-box").find("figure img").attr("src",getAttr);
    },
    function(e) {

    }
);
</script>

and I want to share with you demo link to see how to work

顺便说一句，如果您在检查元素上看不到 data-src，请尝试检查源代码（对于 chrome，请按 ctrl+U）

Answer 1

 $(this).attr("data-src") 

您可以查看此链接以获取更多信息How to get the data-id attribute?

Answer 2

$(selector).data("src") 将获取 data-src 属性的值

https://api.jquery.com/data/

Answer 3

您可以尝试使用以下行：

var getDefaultImg = $(this).find("figure img").data("src");

更多关于数据功能在这里：https://api.jquery.com/data/

Answer 4

您实际上想要获取src 而不是data-src 属性以便在悬停后找到图像的来源，正如您的代码所示，所以它是var getDefaultImg = $(this).find("figure img").attr("src");。

这是因为您使用的延迟加载图像插件在图像加载完成时将data-src 替换为src。

例如（取自plugin's demo）

<!--image 6 load is complete-->    
<img class="lazy img-responsive" src="images/6.jpg?t=1477297898" style="display: block;">

<!--image 7 not loaded yet-->
<img class="lazy img-responsive" data-src="images/7.jpg?t=1477297898" src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==">