如何在点击时将 IMG SRC 属性添加到 SPAN CSS 背景图像中

Question

如何在每次点击 #thumbs1 时将 #largeImage1 SRC 属性添加到跨度背景图像中？它应该使用新的 SRC 更新 span 背景图像。

我似乎无法让它工作。我的语法不起作用。你能帮忙吗？

 <a href="#img1">
  <img id="largeImage1" src="google-1.png" />
 </a>
 
 <a href="#" class="lightbox" id="img1">
  <span></span>
 </a>

  <div id="thumbs1">
    <img src="google-1.png" />
    <img src="google-2.png" />
    <img src="google-3.png" />
    <img src="google-4.png" />
  </div>


$('#thumbs1').delegate('img', 'click', function() { <-- This is working fine
    $('#largeImage1').attr('src', $(this).attr('src').replace('thumb', 'large')); <-- This is working fine
    $('span').css('background-image', 'url()'); <---- This is the problem, I can see in the inspection tool, that when clicked it adds background-image to span but doesn't add image SRC inside it. I don't know what to call inside the url. I checked online but seemed confusing
});

提前谢谢你

Answer 1

从您的示例中无法完全清楚您想要做什么。这是一个可能对您有所帮助的示例。

$(function() {
  function moveShade(target) {
    $("#thumbs1 .shade").css({
      width: $(target).width(),
      height: $(target).height(),
      top: $(target).position().top,
      left: $(target).position().left
    });
  }
  $('#thumbs1').delegate('img', 'click', function() {
    $('#largeImage1').attr('src', $(this).attr('src'));
    $('.lightbox span').css('background-image', 'url(' + $(this).attr('src') + ')');
    $("#thumbs1 .active").removeClass("active");
    $(this).addClass("active");
    moveShade(".active");
  });
  moveShade(".active");
});

a[href='#img1'] img {
  width: 480px;
}

#thumbs1 {
  position: relative;
}

#thumbs1 img {
  width: 100px;
}

#thumbs1 .shade {
  background-color: rgba(0, 0, 0, 0.45);
  position: absolute;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<a href="#img1">
  <img id="largeImage1" src="https://i.imgur.com/HGKqg1T.jpeg" />
</a>

<a href="#" class="lightbox" id="img1">
  <span></span>
</a>

<div id="thumbs1">
  <img class="active" src="https://i.imgur.com/HGKqg1T.jpeg" />
  <img src="https://i.imgur.com/bLvEb3m.jpeg" />
  <img src="https://i.imgur.com/IjT9NLy.jpeg" />
  <img src="https://i.imgur.com/CkIsdeq.jpeg" />
  <div class="shade"></div>
</div>

您可以看到，在 CSS 中，您更新了 url()，但您必须添加所需的 URL 字符串。我认为，这将来自其他缩略图之一。