Hoo*_*ini 4 html css twitter-bootstrap bootstrap-4
在下面的示例中，使用可以打开一个模式，输入一条消息，然后发送它...发送消息需要 2 秒...我想显示一个微调器（它已经在工作）但我也想当微调器显示时，模态的背景会变灰......
$("#sendBtn").click(function() {
$('.sending-message-spinner').show();
setTimeout(function () {
$("#myModal").modal("hide");
}, 2000);
});textarea {
width: 100%;
height: 80px;
}
@keyframes loading {
0% {
transform: rotate(0);
}
100% {
transform: rotate(360deg);
}
}
.sending-message-spinner {
position: fixed;
text-align: center;
z-index: 20;
display: none;
width: 40px;
height: 40px;
border: 8px solid #B0B0B0;
border-radius: 50%;
border-top-color: #000;
animation: loading .75s linear infinite;
}<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
Open modal
</button>
<div class="modal" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<!-- Modal Header -->
<div class="modal-header">
<h4 class="modal-title">Modal Heading</h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<div class="modal-body">
<div class="d-flex justify-content-center">
<div class="feedback-position sending-message-spinner">
</div>
</div>
<p>type your message: </p>
<Textarea> </textarea>
<button id='sendBtn' type="button" class="btn btn-primary">Send Message</button>
</div>
</div>
</div>
</div>
</div>
</body>
</html>您可以向 CSS 添加一个类，并让 JS 在单击按钮时调用它。我添加到 CSS.myClass并在那里设置不透明度，然后在 JS 中调用它，以便在单击按钮时$("#myModal").addClass('myClass');添加该类。myModal看这里：
更新：这里我用一个覆盖 div 来做到myModal这一点，这将使模式变灰而不使其透明。
$("#sendBtn").click(function() {
$("#overlay").show();
$('.sending-message-spinner').show();
setTimeout(function () {
$("#myModal").modal("hide");
}, 2000);
});textarea {
width: 100%;
height: 80px;
}
@keyframes loading {
0% {
transform: rotate(0);
}
100% {
transform: rotate(360deg);
}
}
.sending-message-spinner {
position: fixed;
text-align: center;
z-index: 20;
display: none;
width: 64px;
height: 64px;
border: 8px solid #B0B0B0;
border-radius: 50%;
border-top-color: #000;
animation: loading .75s linear infinite;
}
#overlay {
position: fixed;
display: none;
width: 100%;
height: 100%;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: rgba(0,0,0,0.5);
z-index: 10;
}<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
Open modal
</button>
<div class="modal" id="myModal">
<div id="overlay"></div>
<div class="modal-dialog">
<div class="modal-content">
<!-- Modal Header -->
<div class="modal-header">
<h4 class="modal-title">Modal Heading</h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<div class="modal-body">
<div class="d-flex justify-content-center">
<div class="feedback-position sending-message-spinner">
</div>
</div>
<p>type your message: </p>
<Textarea> </Textarea>
<button id='sendBtn' type="button" class="btn btn-primary">Send Message</button>
</div>
</div>
</div>
</div>
</div>
</body>
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