javascript - 在显示模态之前加载模态内容

Question

好的，所以我有一个简单的 CSS 样式模式，通过 jScript 在点击按钮时显示。这是 jScript:

<script>
var modal = document.getElementById('myModal');
var btn = document.getElementById("myBtn");
var span = document.getElementsByClassName("close")[0];
btn.onclick = function() {
    modal.style.display = "block";
}
span.onclick = function() {
    modal.style.display = "none";
}
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}
</script>

SOURCE

因为我会在页面上有很多这样的东西，所以模态框的内容(主要是大图片)在实际显示相应模态框之前不会加载是必要的。据我所知，我需要通过 jQuery 执行此操作，但我似乎找不到任何好的代码段。

提前致谢

Answer 1

解决方案是在单击按钮时设置图像源，以便显示模态。

您可以使用document.querySelector() 方法使用javascript 设置图像source。

document.querySelector('.modal-content img').src=src;

或者，使用 jquery 库，使用 .attr() 方法。

$('.modal-content').find('img').attr('src',src);

var modal = document.getElementById('myModal');
var src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQxPY1VmPOqgQip3ku3TUrx5g_uryG63qlN9iDBaXkWkTrT466fqA";
// Get the button that opens the modal
var btn = document.getElementById("myBtn");

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

// When the user clicks the button, open the modal 
btn.onclick = function() {
    modal.style.display = "block";
    //document.querySelector('.modal-content img').src=src;
    $('.modal-content').find('img').attr('src',src);
}

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

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}

.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(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
    background-color: #fefefe;
    margin: auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
}

/* The Close Button */
.close {
    color: #aaaaaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="myBtn">Open Modal</button>

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

  <!-- Modal content -->
  <div class="modal-content">
    <img src=""/>
    <span class="close">&times;</span>
    <p>Some text in the Modal..</p>
  </div>

</div>

更新。具有更多图像的解决方案。

var modal = document.getElementById('myModal');
var src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQxPY1VmPOqgQip3ku3TUrx5g_uryG63qlN9iDBaXkWkTrT466fqA";
// Get the button that opens the modal
var btn = document.getElementById("myBtn");

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

// When the user clicks the button, open the modal 
btn.onclick = function() {
    modal.style.display = "block";
    $('.modal-content').find('img').each(function(){
        $(this).remove();
    });
  for(i=0;i<100;i++){
     $('.modal-content').append('<img src=""/>');
  }
  $('img').attr('src',src);
}

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

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}

.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(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
    background-color: #fefefe;
    margin: auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
}

/* The Close Button */
.close {
    color: #aaaaaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="myBtn">Open Modal</button>

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

  <!-- Modal content -->
  <div class="modal-content">
    <span class="close">&times;</span>
    <p>Some text in the Modal..</p>
  </div>

</div>