Bootstrap3>5 Updagrade
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<!DOCTYPE html>
<!DOCTYPE html>
<html lang="en">
<html lang="en">
<head>
<head>
<title>Bootstrap Example</title>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<!-- Bootstrap 5 CSS -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-KyZXEAg3QhqLMpG8r+Knujsl5/6en8XCp+HHAAK5GSLf2xlYtvJ8U2Q4U+9cuEnJoa3" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
</head>
<body>
<body>
<div class="container">
<div class="container">
<h2>Horizontal form</h2>
<h2>Horizontal form</h2>
<form class="form-horizontal" action="/action_page.php">
<form class="form-horizontal" action="/action_page.php">
<div class="form-group">
<div class="form-group">
<label class="control-label col-sm-2" for="email">Email:</label>
<label class="control-label col-sm-2" for="email">Email:</label>
<div class="col-sm-10">
<div class="col-sm-10">
<input type="email" class="form-control" id="email" placeholder="Enter email" name="email">
<input type="email" class="form-control" id="email" placeholder="Enter email" name="email">
</div>
</div>
</div>
</div>
<div class="form-group">
<div class="form-group">
<label class="control-label col-sm-2" for="pwd">Password:</label>
<label class="control-label col-sm-2" for="pwd">Password:</label>
<div class="col-sm-10">
<div class="col-sm-10">
<input type="password" class="form-control" id="pwd" placeholder="Enter password" name="pwd">
<input type="password" class="form-control" id="pwd" placeholder="Enter password" name="pwd">
</div>
</div>
</div>
</div>
<div class="form-group">
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<div class="col-sm-offset-2 col-sm-10">
<div class="checkbox">
<div class="form-check">
<label><input type="checkbox" name="remember"> Remember me</label>
<input class="form-check-input" type="checkbox" name="remember">
<label class="form-check-label" for="remember">Remember me</label>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="form-group">
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<div class="col-sm-offset-2 col-sm-10">
<button type="submit" class="btn btn-default">Submit</button>
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</div>
</div>
</div>
</form>
</form>
</div>
</div>
<!-- Bootstrap 5 JavaScript -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" integrity="sha384-cn7l7gDp0eyniUwwAZgrzD06kc/tftFf19TOAs2zVinnD/C7E91j9yyk5//jjpt/" crossorigin="anonymous"></script>
</body>
</body>
</html>
</html>