<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
<!-- <script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script> -->
<!-- <script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/jquery-ui.min.js" type="text/javascript"></script> -->
<!-- <script src="/bootstrap/js/bootstrap.min.js"></script> -->
<!-- <script src="/js/slider_input.js"></script> -->
<!-- <link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.9/themes/base/jquery-ui.css" type="text/css" media="all" /> -->
<!-- <link href="/bootstrap/css/bootstrap.min.css" rel="stylesheet" media="screen"> -->
</head>
<body>
<div class="container">
<div class="row">
<div class="col-xs-12">
<p>Header (12 Cột)</p>
</div>
<div class="col-md-3">
<p>Left Menu (3 cột)</p>
</div>
<div class="col-md-6">
<p>Content (6 cột)</p>
</div>
<div class="col-md-3">
<p>Right (3 cột)</p>
</div>
<div class="col-md-6">
<p>Footer (6 cột)</p>
</div>
<div class="col-md-6">
<p>Footer (6 cột)</p>
</div>
</div>
</div>
<div class="container">
<h2>Button Styles</h2>
<button type="button" class="btn">Basic</button>
<button type="button" class="btn btn-default">Default</button>
<button type="button" class="btn btn-primary">Primary</button>
<button type="button" class="btn btn-success">Success</button>
<button type="button" class="btn btn-info">Info</button>
<button type="button" class="btn btn-warning">Warning</button>
<button type="button" class="btn btn-danger">Danger</button>
<button type="button" class="btn btn-link">Link</button>
</div>
<!-- <script src="https://code.jquery.com/jquery-2.2.4.min.js"></script> -->
<!-- <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script> -->
<script src="http://code.jquery.com/jquery.min.js"></script>
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</body>
</html>
trong khi các đoạn code Bootstrap khác e viết work rất tốt
e cũng nghĩ là do mấy dòng này
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
<script src="http://code.jquery.com/jquery.min.js"></script>
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
Mong các bác bỏ chút thời gian vàng ngọc của mình ra để chỉ giáo hiền đệ ạ <3