我创建了一个弹出框,当用户单击按钮时会出现该弹出框。目前,我可以让框出现,但当用户关闭它并重新打开它时,代码再次运行,另一个框堆叠在旧框的顶部。
我想做的是让它无论用户点击多少次,它只显示一个框…我的想法可能是检查它是否是空的,类似于How do I check if an HTML element is empty using jQuery?,但是到目前为止还没有起作用。
对菜鸟笨蛋有什么建议吗?提前感谢所有回复。
<button onclick="popup()">text</button>
<script>
var box = document.getElementById('popupbox');
function popup(){
box.style.display = "block";
var content = document.createElement('div');
content.className = 'boxstyle';
content.innerHTML = ' ...a handful of tags...';
box.appendChild(content);}
function exit(){
box.style.display = "none";}
</script>发布于 2017-11-18 15:04:38
您可以使用模式创建弹出窗口,如下所示。我刚复制了from here代码
<!DOCTYPE html>
<html>
<head>
<style>
/* 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(0,0,0,0.4); /* 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;
}
</style>
</head>
<body>
<h2>Modal Example</h2>
<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal</button>
<!-- The Modal -->
<div id="myModal" class="modal">
<!-- Modal content -->
<div class="modal-content">
<span class="close">×</span>
<p>Some text in the Modal..</p>
</div>
</div>
<script>
// Get the modal
var modal = document.getElementById('myModal');
// 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";
}
// 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";
}
}
</script>
</body>
</html>
发布于 2017-11-18 15:31:29
实际上,我只需在代码块出现后添加box.innerHTML = ''就可以解决这个问题,这样它就可以从头开始工作了。我试图变得更优雅一些,并尝试使用If/Else语句,但最终它似乎起作用了。非常感谢所有回复/评论的人,你们都很棒!
<button onclick="popup()">text</button>
<script>
var box = document.getElementById('popupbox');
function popup(){
box.style.display = "block";
box.innerHTML = '';
var content = document.createElement('div');
content.className = 'boxstyle';
content.innerHTML = ' ...a handful of tags...';
box.appendChild(content);}
function exit(){
box.style.display = "none";}
https://stackoverflow.com/questions/47362911
复制相似问题