答：使用Bootstrap.modal('show')方法
您可以使用Bootstrap.modal('show')方法在页面加载时自动启动模式窗口，而无需单击任何内容。该技术的一个常见示例是，当用户登陆首页时加载模式并请求他们订阅网站新闻。
让我们尝试以下示例以了解其基本工作原理：
例试试这个代码»
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Open Bootstrap Modal on Page Load</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<script src="js/jquery-3.5.1.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script>
$(document).ready(function(){
$("#myModal").modal('show');
});
</script>
</head>
<body>
<div id="myModal" class="modal fade">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title">Subscribe our Newsletter</h5>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<div class="modal-body">
<p>Subscribe to our mailing list to get the latest updates straight in your inbox.</p>
<form>
<div class="form-group">
<input type="text" class="form-control" placeholder="Name">
</div>
<div class="form-group">
<input type="email" class="form-control" placeholder="Email Address">
</div>
<button type="submit" class="btn btn-primary">Subscribe</button>
</form>
</div>
</div>
</div>
</div>
</body>
</html>
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