尝试创建包含多张图片的页面，当您单击每张图片时，它会使用模式进行放大。这段代码非常适用于1张图片，但随着我添加了几张图片，只有第一张图片才有效。请指教。
// Zoom in Affect
// 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("img"); <!-- ? -->
var captionText = document.getElementById("caption"); <!-- ? -->
img.onclick = function(){ <!-- when you click on var img (which equals id="myImg", which is the original img? -->
modal.style.display = "block"; <!-- ? -->
modalImg.src = this.src; <!-- ? -->
modalImg.alt = this.alt; <!-- ? -->
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 {
cursor: pointer;
transition: 0.3s;
border-top-left-radius: 20px;
border-top-right-radius: 20px;
border: 3px solid #7DAFE7;
}
#myImg:hover {
opacity: 0.7; /* How much image changes when moving mouse over it */
border: 3px solid #137709;
}
/* The Modal (background) */
.modal {
display: none; /* ? */ /* Hidden by default */
position: fixed; /* ? */ /* Stay in place */
z-index: 1; /* ? */ /* Sit on top */
padding-top: 100px; /* Pixels the zoomed image is from the top of the screen */ /* 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); /* ? not sure why there's 2 background-color */ /* Fallback color */
background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}
/* Modal Content (image) */
.modal-content {
margin: auto;
display: block;
width: 80%; /* Width of picture inside modal? */
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;
font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, sans-serif;
}
.close:hover,
.close:focus {
color: #bbb;
text-decoration: none;
cursor: pointer;
}
.picture {
width: 100%;
/*background-color: #0200FF;*/
padding-left: 5%;
padding-right: 5%;
padding-top: 5%;
position: relative;
}
.imgPicture {
width: 90%;
}<div class="picture">
<img class="imgPicture" id="myImg" src="photo-1.jpg">
<div id="myModal" class="modal">
<span class="close">X</span> <img id="img" class="modal-content">
<div id="caption"></div>
</div>
</div>
<div class="picture">
<img class="imgPicture" id="myImg" src="photo-2.jpg">
<div id="myModal" class="modal">
<span class="close">X</span> <img id="img" class="modal-content">
<div id="caption"></div>
</div>
</div>
答案 0 :(得分：1)
您需要将事件侦听器附加到每个元素，因为有多个实例。此外，在创建元素的多个实例时，最好使用类而不是ID（除非，正如@mmm建议的那样，它们是唯一的）。
// Zoom in Affect
// 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.getElementsByClassName('imgPicture'); <!-- ? -->
var modalImg = document.getElementById("img"); <!-- ? -->
var captionText = document.getElementById("caption"); <!-- ? -->
for (var i=0; i<img.length; i++) {
img[i].addEventListener('click', function(){ <!-- when you click on var img (which equals id="myImg", which is the original img? -->
modal.style.display = "block"; <!-- ? -->
modalImg.src = this.src; <!-- ? -->
modalImg.alt = this.alt; <!-- ? -->
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 {
cursor: pointer;
transition: 0.3s;
border-top-left-radius: 20px;
border-top-right-radius: 20px;
border: 3px solid #7DAFE7;
}
#myImg:hover {
opacity: 0.7; /* How much image changes when moving mouse over it */
border: 3px solid #137709;
}
/* The Modal (background) */
.modal {
display: none; /* ? */ /* Hidden by default */
position: fixed; /* ? */ /* Stay in place */
z-index: 1; /* ? */ /* Sit on top */
padding-top: 100px; /* Pixels the zoomed image is from the top of the screen */ /* 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); /* ? not sure why there's 2 background-color */ /* Fallback color */
background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}
/* Modal Content (image) */
.modal-content {
margin: auto;
display: block;
width: 80%; /* Width of picture inside modal? */
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;
font-family: "Gill Sans", "Gill Sans MT", "Myriad Pro", "DejaVu Sans Condensed", Helvetica, Arial, sans-serif;
}
.close:hover,
.close:focus {
color: #bbb;
text-decoration: none;
cursor: pointer;
}
.picture {
width: 100%;
/*background-color: #0200FF;*/
padding-left: 5%;
padding-right: 5%;
padding-top: 5%;
position: relative;
}
.imgPicture {
width: 90%;
}<div class="picture">
<img class="imgPicture" id="myImg" src="photo-1.jpg">
<div id="myModal" class="modal">
<span class="close">X</span> <img id="img" class="modal-content">
<div id="caption"></div>
</div>
</div>
<div class="picture">
<img class="imgPicture" id="myImg" src="photo-2.jpg">
<div id="myModal" class="modal">
<span class="close">X</span> <img id="img" class="modal-content">
<div id="caption"></div>
</div>
</div>