dropdown

UK[drɒp'daʊn] US[drɒp'daʊn]

n. Drop-down (list), drop-down (menu); water level drop Deep

##menu

英[ˈmenju:] 美[ˈmɛnju, ˈmenju]

n.Menu; dish, dish

right

英[raɪt] 　　美[raɪt]  

adv. Immediately, immediately; to the right, to the right; appropriately; all the time

adj. Correct; appropriate; right; good, normal

n.right; right; right; correct, just; right hand

vt.Correct; straighten; straighten; organize; Compensation

vi. (ship, etc.) restoration, restoration of stability

Bootstrap dropdown-menu-right style syntax

Function: Drop-down menu right-aligned

Bootstrap dropdown-menu-right style example

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
    <title>Bootstrap 实例 - 下拉菜单</title>
	<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
	<script src="https://cdn.bootcss.com/jquery/2.1.1/jquery.min.js"></script>
	<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>下拉菜单</h2>
  <p>在  .dropdown-menu 中添加 .dropdown-menu-right 类来设置下拉菜单右对齐：</p>
  <div class="dropdown">
    <button class="btn btn-default dropdown-toggle" type="button" id="menu1" data-toggle="dropdown">教程
    <span class="caret"></span></button>
    <ul class="dropdown-menu dropdown-menu-right" role="menu" aria-labelledby="menu1">
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">HTML</a></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">CSS</a></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">JavaScript</a></li>
      <li role="presentation" class="divider"></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">关于我们</a></li>
    </ul>
  </div>
</div>

</body>
</html>
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