我如何编辑 w3schools 代码以允许单击两个或多个模态图像？

Question

在为多个图像单击一个图像后，我无法调用显示模态的函数。目前它只适用于一张图片。如果在 js 代码中分配给变量的 id 和 html 代码对于所有图像都是相同的，那么该函数不应该适用于所有图像而不仅仅是一个图像吗？我基本上有一个网站，其中我需要显示 12 张图像。单击时每个都应该放大。就像在w3学校代码中一样。

// 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("img1");
var captionText = document.getElementById("caption");
img.onclick = function() {
  modal.style.display = "block";
  modalImg.src = this.src;
  captionText.innerHTML = this.alt;
}

// 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";
}

#myImg {
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
}

#myImg:hover {
  opacity: 0.7;
}


/* The Modal (background) */

.modal {
  display: none;    /* Hidden by default */
  position: fixed;  /* Stay in place */
  z-index: 1;       /* 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: 80%;
  max-width: 700px;
}


/* Caption of Modal Image */

#caption {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
  text-align: center;
  color: #ccc;
  padding: 10px 0;
  height: 150px;
}


/* 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%;
  }
}

<img id="myImg" src="img_snow.jpg" alt="Snow" style="width:100%;max-width:300px">

<img id="myImg" src="img_snow.jpg" alt="Snow" style="width:100%;max-width:300px">

<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content" id="img1">
  <div id="caption"></div>
</div>

<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content" id="img1">
  <div id="caption"></div>
</div>

Answer 1

每个元素的 ID 应该是唯一的

希望以下代码段对您有所帮助

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

// Get the image and insert it inside the modal - use its "alt" text as a caption
var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");
function showmodal(id){
  var img = document.getElementById(id);
  modal.style.display = "block";
  modalImg.src = img.src;
  captionText.innerHTML = img.alt;
}

// 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";
}

body {font-family: Arial, Helvetica, sans-serif;}

#myImg {
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
}

#myImg:hover {opacity: 0.7;}

/* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* 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: 80%;
  max-width: 700px;
}

/* Caption of Modal Image */
#caption {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
  text-align: center;
  color: #ccc;
  padding: 10px 0;
  height: 150px;
}

/* 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%;
  }
}

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">

</head>
<body>

<h2>Image Modal</h2>


<img id="myImg" onclick="showmodal('myImg')" src="https://images.pexels.com/photos/67636/rose-blue-flower-rose-blooms-67636.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500" alt="Flower" style="width:100%;max-width:300px">

<img id="myImg1" onclick="showmodal('myImg1')" src="https://image.shutterstock.com/image-photo/mountains-during-sunset-beautiful-natural-260nw-407021107.jpg" alt="landscape" style="width:100%;max-width:300px">

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



</body>
</html>

Answer 2

如前所述，您不能在一个页面上使用多个 ID。 id（标识符）的主要含义是唯一的，并且可以使用确切的名称。

需要重写，所以我添加了一个简单的脚本，没有改变一般风格：

handleModalPopup();

function handleModalPopup(){
  let mod = GetModalComponents();
  
  let img = document.querySelectorAll('.img');
  
  for( let i = 0; i < img.length; i++ ){
    img[i].addEventListener('click', function(){
      mod.modal.style.display = "block";
      mod.img.src = this.src; // `this` references to clicked image
      mod.caption.textContent = this.getAttribute('alt');
    });
  }
  
  mod.close.onclick = function(){
    mod.modal.style.display = "none";
  } // Google → onclick vs addEventListener
}

function GetModalComponents(){
  let modal = document.getElementById('myModal');
  
  return {
    modal: modal,
    close: modal.querySelector('.close'),
    img: modal.querySelector('.modal-content'),
    caption: modal.querySelector('.caption'),
  }; // yes, you can save the links to HTML elements in one object.
}

.img {
  width: 100px;
  height: 100px;
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
}

#myImg:hover {
  opacity: 0.7;
}


/* The Modal (background) */

.modal {
  display: none;    /* Hidden by default */
  position: fixed;  /* Stay in place */
  z-index: 1;       /* 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: 80%;
  max-width: 700px;
}


/* Caption of Modal Image */

#caption {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
  text-align: center;
  color: #ccc;
  padding: 10px 0;
  height: 150px;
}


/* 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%;
  }
}

<img class="img" src="https://gyazo.com/fe48322c44d1c214ee8d9ba49876a0da.png" alt="one">

<img class="img" src="https://gyazo.com/c708f879e56f725318fafca74b9cbe7f.png" alt="Two">

<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content">
  <div class="caption"></div>
</div>

有问题吗？）

我如何编辑 w3schools 代码以允许单击两个或多个模态图像？

How can i edit the w3schools code to let two or more modal images on click?

javascript

html

image

modal-dialog

image-enlarge