<!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 href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
<div class="container mt-3">
<h2>拨动开关</h2>
<p>请尝试在切换和不切换开关的情况下提交表单。</p>
<form action="/demo/html/action_page.php">
<div class="form-check form-switch">
<input class="form-check-input" type="checkbox" id="mySwitch" name="darkmode" value="yes" checked>
<label class="form-check-label" for="mySwitch">深色模式</label>
</div>
<button type="submit" class="btn btn-primary mt-3">提交</button>
</form>
</div>
</body>
</html>