Javascript / CSS Lightbox仅适用于第一个元素？

问题描述 投票：6回答：2

我试图在点击每张照片时在Javascript / CSS灯箱中打开我的每张照片。

目前，我的照片列表中只有第一张照片在灯箱中打开。其他照片无法在灯箱中打开。

请有人解释/告诉我为什么会这样，并解释/告诉我这样做的正确方法？

这是我的HTML / PHP：

<?php $result4 = $mysqli->query("SELECT * FROM user_data WHERE user_id = $p_id");
    if($result4->num_rows > 0) {
    echo '<div class="profile_gallery_image"><img id="myImg" src='.$image.' height="100%" width="100%" /></div>';
    echo '<div class="profile_gallery_image"><img id="myImg" src='.$image.' height="100%" width="100%" /></div>';
    echo '<div class="profile_gallery_image"><img id="myImg" src='.$image.' height="100%" width="100%" /></div>';
    echo '<div class="profile_gallery_image"><img id="myImg" src='.$image.' height="100%" width="100%" /></div>';
    echo '<div class="profile_gallery_image"><img id="myImg" src='.$image.' height="100%" width="100%" /></div>';
    echo '<div class="profile_gallery_image"><img id="myImg" src='.$image.' height="100%" width="100%" /></div>';

    } ?>  

<!-- The Modal -->
<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content" id="img01">
</div>

CSS：

<style>

#myImg {
  cursor: pointer;
  transition: 0.3s;
}

#myImg:hover {
    transform: scale(1.09);
    border: 1px solid #a5a5a5;

}

/* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 10; /* Sit on top */
  padding-top: 100px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content (image) */
.modal-content {
  margin: auto;
  display: block;
  width: 100%;
  max-width: 500px;
  border: 1px solid #f1f1f1;
  border-radius: 0px;

}

/* Caption of Modal Image */

/* Add Animation */
.modal-content, #caption {  
  -webkit-animation-name: zoom;
  -webkit-animation-duration: 0.6s;
  animation-name: zoom;
  animation-duration: 0.6s;
}

@-webkit-keyframes zoom {
  from {-webkit-transform:scale(0)} 
  to {-webkit-transform:scale(1)}
}

@keyframes zoom {
  from {transform:scale(0)} 
  to {transform:scale(1)}
}

/* The Close Button */
.close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
}

.close:hover,
.close:focus {
  color: #bbb;
  text-decoration: none;
  cursor: pointer;
}

/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
  .modal-content {
    width: 100%;
  }
}
</style>

使用Javascript：

   <script>
// Get the modal
var modal = document.getElementById('myModal');

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

}

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
var span2 = document.getElementsByClassName("modal")[0];

// When the user clicks on <span> (x), close the modal
span.onclick = function() { 
  modal.style.display = "none";
}
span2.onclick = function() { 
  modal.style.display = "none";
}
</script>

提前致谢。

javascript css lightbox
2个回答
0
投票

您的代码包含多个id，而不是尝试使用类并通过document.getElementsByClassName获取您的图像类，然后在循环内的每个图像上绑定click事件，尝试将您的php代码添加到下面的修订代码中

// Get the modal
var modal = document.getElementById('myModal');

// Get the image and insert it inside the modal - use its "alt" text as a caption
var imgs = document.getElementsByClassName("myImg");
var modalImg = document.getElementById("img01");

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

  }
}

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
var span2 = document.getElementsByClassName("modal")[0];

// When the user clicks on <span> (x), close the modal
span.onclick = function() { 
  modal.style.display = "none";
}
span2.onclick = function() { 
  modal.style.display = "none";
}
#myImg {
  cursor: pointer;
  transition: 0.3s;
}

#myImg:hover {
    transform: scale(1.09);
    border: 1px solid #a5a5a5;

}

/* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 10; /* Sit on top */
  padding-top: 100px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content (image) */
.modal-content {
  margin: auto;
  display: block;
  width: 100%;
  max-width: 500px;
  border: 1px solid #f1f1f1;
  border-radius: 0px;

}

/* Caption of Modal Image */

/* Add Animation */
.modal-content, #caption {  
  -webkit-animation-name: zoom;
  -webkit-animation-duration: 0.6s;
  animation-name: zoom;
  animation-duration: 0.6s;
}

@-webkit-keyframes zoom {
  from {-webkit-transform:scale(0)} 
  to {-webkit-transform:scale(1)}
}

@keyframes zoom {
  from {transform:scale(0)} 
  to {transform:scale(1)}
}

/* The Close Button */
.close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
}

.close:hover,
.close:focus {
  color: #bbb;
  text-decoration: none;
  cursor: pointer;
}

/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
  .modal-content {
    width: 100%;
  }
}
    <div class="profile_gallery_image"><img class="myImg" src='https://via.placeholder.com/150' height="100%" width="100%" /></div>
    <div class="profile_gallery_image"><img class="myImg" src='https://via.placeholder.com/150' height="100%" width="100%" /></div>
    <div class="profile_gallery_image"><img class="myImg" src='https://via.placeholder.com/150' height="100%" width="100%" /></div>
    <div class="profile_gallery_image"><img class="myImg" src='https://via.placeholder.com/150' height="100%" width="100%" /></div>
    <div class="profile_gallery_image"><img class="myImg" src='https://via.placeholder.com/150' height="100%" width="100%" /></div>
    <div class="profile_gallery_image"><img class="myImg" src='https://via.placeholder.com/150' height="100%" width="100%" /></div>



<!-- The Modal -->
<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content" id="img01">
</div>
0
投票

好消息是你的图像上既不需要ids也不需要class。

  • 听一下图像周围的容器，而不是图像本身。此技术称为事件委派，对性能更好。而不是为您可能拥有的每个图像绑定n事件侦听器，我们只在图像的容器上添加一个侦听器
  • 单击时，获取src元素的alt和target并将其传递给showModal函数。用传递的值填充模态图像的src和alt

建议以后

看来你/你正计划在你的模态中显示一个基于传入的alt值的标题。考虑在模态中使用figcaption。

HTML或Figure Caption元素表示描述其父元素的其余内容的标题或图例。

这是一个让你入门的例子。我将把模态/模态内容的样式留给你。我在模态中使用了figure元素来获取语义值。

演示

var modal = document.getElementById('myModal');

var imgContainer = document.querySelector('.imageContainer');
var modalContentImage = modal.querySelector('.modal-content-image');

imgContainer.addEventListener('click', function(e) {
  if (e.target.nodeName === "IMG") {
    showModal({src: e.target.src, alt: e.target.alt})
  }
});

function showModal(opts) {
  modal.style.display = "block";
  modalContentImage.setAttribute('src', opts.src);
  modalContentImage.setAttribute('alt', opts.alt);
}

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
var span2 = document.getElementsByClassName("modal")[0];

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
  modal.style.display = "none";
}
span2.onclick = function() {
  modal.style.display = "none";
}
#myImg {
  cursor: pointer;
  transition: 0.3s;
}

#myImg:hover {
  transform: scale(1.09);
  border: 1px solid #a5a5a5;
}

/* The Modal (background) */

.modal {
  display: none;
  /* Hidden by default */
  position: fixed;
  /* Stay in place */
  z-index: 10;
  /* Sit on top */
  padding-top: 100px;
  /* Location of the box */
  left: 0;
  top: 0;
  width: 100%;
  /* Full width */
  height: 100%;
  /* Full height */
  overflow: auto;
  /* Enable scroll if needed */
  background-color: rgb(0, 0, 0);
  /* Fallback color */
  background-color: rgba(0, 0, 0, 0.9);
  /* Black w/ opacity */
}

/* Modal Content (image) */

.modal-content-image {
  margin: auto;
  display: block;
  width: 100%;
  max-width: 500px;
  border: 1px solid #f1f1f1;
  border-radius: 0px;
}

/* Caption of Modal Image */

/* Add Animation */

.modal-content,
#caption {
  -webkit-animation-name: zoom;
  -webkit-animation-duration: 0.6s;
  animation-name: zoom;
  animation-duration: 0.6s;
}

@-webkit-keyframes zoom {
  from {
    -webkit-transform: scale(0)
  }
  to {
    -webkit-transform: scale(1)
  }
}

@keyframes zoom {
  from {
    transform: scale(0)
  }
  to {
    transform: scale(1)
  }
}

/* The Close Button */

.close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
}

.close:hover,
.close:focus {
  color: #bbb;
  text-decoration: none;
  cursor: pointer;
}

/* 100% Image Width on Smaller Screens */

@media only screen and (max-width: 700px) {
  .modal-content {
    width: 100%;
  }
}

/* Presentation only */

.imageContainer {
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  overflow-x: auto;
}

.imageContainer img {
  width: 100px;
  flex-shrink: 0;
}

html,
body {
  margin: 0;
  padding: 0;
}
<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <figure class="modal-content">
    <img class="modal-content-image" alt>
  </figure>
</div>

<div class="imageContainer">
  <img src="https://picsum.photos/300/300/?image=0" alt="CPU 1">
  <img src="https://picsum.photos/300/300/?image=1" alt="CPU 2">
  <img src="https://picsum.photos/300/300/?image=2" alt="CPU 3">
  <img src="https://picsum.photos/300/300/?image=3" alt="CPU 4">
  <img src="https://picsum.photos/300/300/?image=4" alt="CPU 5">
  <img src="https://picsum.photos/300/300/?image=5" alt="CPU 6">
  <img src="https://picsum.photos/300/300/?image=6" alt="CPU 7">
  <img src="https://picsum.photos/300/300/?image=7" alt="CPU 8">
  <img src="https://picsum.photos/300/300/?image=8" alt="CPU 9">
  <img src="https://picsum.photos/300/300/?image=9" alt="CPU 10">
  <img src="https://picsum.photos/300/300/?image=10" alt="CPU 11">
  <img src="https://picsum.photos/300/300/?image=11" alt="CPU 12">  
</div>

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