单击时替换模态图像

Question

我已经有一段时间没有使用 JS 了，我在创建这个 modal-img 时遇到了问题。

我正在关注 this 指南。

模态脚本正常工作。如果我单击图像“img_snow.jpg”，它会打开具有相同图像的模态，但我真正需要的是单击图像并打开具有不同图像“img_fire.jpg”的模态，而不是我之前点击过的那个。

我试图仅在模式弹出时将“img_snow.jpg”替换为“img_fire.jpg”。

关于如何解决这个问题的任何线索？

<!-- Image to show on the modal -->
<img id="myImgToReplace" src="img_fire.jpg">

<!-- Trigger the Modal -->
<img id="myImg" src="img_snow.jpg" alt="Snow">

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- The Close Button -->
  <span class="close">&times;</span>

  <!-- Modal Content (The Image) -->
  <img class="modal-content" id="img01">

  <!-- Modal Caption (Image Text) -->
  <div id="caption"></div>
</div>

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");
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";
}

Answer 1

  modalImg.src = document.getElementById('myImgToReplace').src;

你试过吗？

Answer 2

为了得到想要的结果，需要修改事件函数img.onclick = function(){}。

声明一个要放置默认图像（预览）的变量：

let default_image = this.src;

对于this.src你需要为模态分配图片路径window（我随机选择了一张图片）：

this.src = 'https://www.12542.ru/206-28.jpg';

为了让默认图片变成return，你需要这样做

this.src = default_image;

最后，你的函数应该是这样的：

img.onclick = function(){
  let default_image = this.src;
  modal.style.display = "block";
  this.src = 'https://www.12542.ru/206-28.jpg';
  modalImg.src = this.src;
  this.src = default_image;
  captionText.innerHTML = this.alt;
}

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");
var captionText = document.getElementById("caption");
img.onclick = function(){
  let default_image = this.src;
  modal.style.display = "block";
  this.src = 'https://www.12542.ru/206-28.jpg';
  modalImg.src = this.src;
  this.src = default_image;
  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="https://s1.1zoom.ru/big0/98/Slovenia_Summer_Lake_487816.jpg" alt="Snow" 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>

第二个解决方案：

var modal = document.getElementById("myModal");
var img = document.querySelectorAll(".myImg");
var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");

const img_modal = ['https://static3.depositphotos.com/1000992/133/i/600/depositphotos_1337508-stock-photo-a-free-flying-white-dove.jpg',
'https://i.pinimg.com/474x/9c/a1/7e/9ca17e8e343e1ebfee9a463fc4ec22fe.jpg', 
'https://everskate.com/wp-content/uploads/2017/12/how-to-kickflip-trick-tip-600x336.jpg'];

Array.from(img).forEach(function(imgArray, i) {
  imgArray.onclick = function(){
    let default_image = this.src;
    modal.style.display = "block";
    this.src = img_modal[i];
    modalImg.src = this.src;
    this.src = default_image;
    captionText.innerHTML = this.alt;
  }
});


var span = document.getElementsByClassName("close")[0];
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 class="myImg" src="https://s1.1zoom.ru/big0/98/Slovenia_Summer_Lake_487816.jpg" alt="Snow" style="width:100%;max-width:300px">

<img class="myImg" src="https://s1.1zoom.ru/big0/235/Poppies_Summer_Grasslands_Trees_562184_1270x1024.jpg" alt="Snow" style="width:100%;max-width:300px">

<img class="myImg" src="https://akiwa.ru/upload/dev2fun_opengraph/ccf/ccf8acce0f0bdabc13d15f4f1ff6c549.jpg" alt="Snow" style="width:100%;max-width:300px">

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

单击时替换模态图像

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