javascript - 纯 JavaScript 模态图像的问题

Question

我对模态弹出图像有疑问。我有一个图像列表并尝试使用此代码(有一些更改):https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_modal_img但它仅适用于第一条消息。我怎样才能让它适用于图库中的所有消息？

<div>
           <div class="portfolio-overlay">
                <img src="img/portfolio/Transeco-small.jpg">
                <div class="portfolio-image-overlay image-overlay-content">
                    <div class="portfolio-icons">
                         <i class="icon-zoom-in open-big"><img src="img/portfolio/Transeco-big.jpg" class="img-closed"></i>                          
                        <a href="http://www.google.com" target="_blank"><i class="icon-link"></i></a>
                    </div>
                </div>
            </div>
        </div>
        <div>
           <div class="portfolio-overlay">
                <img src="img/portfolio/Transeco-small.jpg">
                <div class="portfolio-image-overlay image-overlay-content">
                    <div class="portfolio-icons">
                         <i class="icon-zoom-in open-big"><img src="img/portfolio/Transeco-big.jpg" class="img-closed"></i>                          
                        <a href="http://www.google.com" target="_blank"><i class="icon-link"></i></a>
                    </div>
                </div>
            </div>
        </div>
        <div>
           <div class="portfolio-overlay">
                <img src="img/portfolio/Transeco-small.jpg">
                <div class="portfolio-image-overlay image-overlay-content">
                    <div class="portfolio-icons">
                         <i class="icon-zoom-in open-big"><img src="img/portfolio/Transeco-big.jpg" class="img-closed"></i>                          
                        <a href="http://www.google.com" target="_blank"><i class="icon-link"></i></a>
                    </div>
                </div>
            </div>
        </div>
<!-- The Modal -->
        <div class="modal myModal">
          <span class="close">&times;</span>
          <img class="modal-content img01">
        </div>


// Get the modal
var modal = document.querySelector(".myModal");

// Get the image and insert it inside the modal - use its "alt" text as a caption
var img = document.querySelector('.open-big');
var modalImg = document.querySelector(".img01");
var probaa = document.querySelector('.open-big img');
img.onclick = function(){
  modal.style.display = "block";
  modalImg.src = probaa.src;
}

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];

// When the user clicks on <span> (x), close the modal
span.onclick = function() { 
  modal.style.display = "none";
}

控制台没有错误，但它只适用于第一张图片......

Answer 1

var img = document.querySelector('.open-big');

document.querySelector 只选择一个元素，在本例中是第一个类为 open-big

的元素

为了选择所有元素，您必须使用 document.querySelectorAll

然后您可以迭代该设置并为每个添加事件监听器:

var imgs = document.querySelectorAll('.open-big');

for (i = 0; i < imgs.length; ++i) {
  imgs[i].onclick = function(){
    modal.style.display = "block";
    modalImg.src = probaa.src;
  }
}

但是您不能在节点集合上使用普通数组方法。所以，imgs.forEach 将不起作用。虽然有一个复杂的解决方法:

[].forEach.call(imgs, function(img) {
  // do whatever
});

有more information at this link on css tricks.