Question

我目前有2个图像，我希望用户能够点击并弹出它，但到目前为止只有一个图像正常工作。我知道这两个图像具有相同的ID，但是当我尝试更改id时，我必须创建新的CSS代码等。

// 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");
var captionText = document.getElementById("caption");
img.onclick = function(){
    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";
}

/* Style the Image Used to Trigger the Modal */
#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 (Image Text) - Same Width as the Image */
#caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    height: 150px;
}

/* Add Animation - Zoom in the Modal */
.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: 50px;
    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%;
    }
}

<!-- Trigger the Modal -->
                <img id="myImg" src="img/roof.jpg" alt=" Riga, Latvia" width="300" height="200">
                <img id="myImg" src="img/personal.jpg" alt=" Riga, Latvia" width="300" height="200">
                <!-- The Modal -->
                <div id="myModal" class="modal">
                
                <!-- The Close Button -->
                <span class="close" onclick="document.getElementById('myModal').style.display='none'">&times;</span>

                <!-- Modal Content (The Image) -->
                    <img class="modal-content" id="img01">

                <!-- Modal Caption (Image Text) -->
                <div id="caption"></div>
                </div>

Answer 1

一次使用相同的ID并不常见或建议。请访问此网站，了解CSS id's和classes。 ids and classes

尝试使用name元素或class元素，这样就不必更改/复制CSS了。 document.getElementByName或document.getElementByClassName可以解决问题。

Answer 2

设置元素的类

<img id="myImg" class="imageClass" src="img/roof.jpg" alt=" Riga, Latvia" width="300" height="200">
<img id="myImg" class="imageClass" src="img/personal.jpg" alt=" Riga, Latvia" width="300" height="200">

并使用

document.getElementsByClassName("imageClass")

获取img元素的集合。然后对每个元素应用以下内容。

var images = document.getElementsByClassName("imageClass");
for(var i = 0; i < images.length; i++){
    var img = images[i];
    var modalImg = document.getElementById("img01");
    var captionText = document.getElementById("caption");
    img.onclick = function(){
        modal.style.display = "block";
        modalImg.src = this.src;
        modalImg.alt = this.alt;
        captionText.innerHTML = this.alt;
    }
}

Answer 3

问题在于你给了他们两个相同的id，就像你说的那样，两个元素不能有相同的id和整个问题，你提到它与css有关的正是类的用途。

尝试将代码更改为：

JS：

// 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 img1 = document.getElementById('myImg1');
var img2 = document.getElementById('myImg2');
var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");

img1.onclick = function(){
    modal.style.display = "block";
    modalImg.src = this.src;
    modalImg.alt = this.alt;
    captionText1.innerHTML = this.alt;
}

img2.onclick = function(){
    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";
}

CSS：

/* Style the Image Used to Trigger the Modal */
.modalImg {
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}

.modalImg: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 (Image Text) - Same Width as the Image */
#caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    height: 150px;
}

/* Add Animation - Zoom in the Modal */
.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: 50px;
    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%;
    }
}

HTML：

            <!-- The Close Button -->
            <span class="close" onclick="document.getElementById('myModal').style.display='none'">&times;</span>

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

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

不可否认，我的编辑非常基础，但我只是想让你的代码正常工作，你可能会把它清理得很多。所以这里我只给了两个图像相同的类样式（而不是id），并给它们两个不同的变量赋值和javascript中的点击事件。

注意两个图像现在都有不同的ID（ID必须是唯一的，类可以共享）。

小提琴：https://jsfiddle.net/djL2gxyu/

希望这有帮助。

如何使用Bootstrap添加多个模态图像

3 个答案: