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<!DOCTYPE html>
<html>
<head>
    <title>W3.CSS(w3cschool.cn)</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" charset="UTF-8">
    <link rel="stylesheet" href="https://7npmedia.w3cschool.cn/w3.css">
</head>
<body>
<div class="w3-container">
    <h2>右对齐下拉菜单</h2>
    <p>使用w3-right类将下拉菜单向右浮动，并使用CSS放置下拉菜单内容（right：0将使下拉菜单从右向左移动）。 </p>
    <div class="w3-dropdown-hover w3-right">
        <button class="w3-button w3-black">下拉</button>
        <div class="w3-dropdown-content w3-bar-block w3-border" style="right:0">
            <a href="#" class="w3-bar-item w3-button">链接 1</a>
            <a href="#" class="w3-bar-item w3-button">链接 2</a>
            <a href="#" class="w3-bar-item w3-button">链接 3</a>
        </div>
    </div>
    <div class="w3-clear"></div>
    <p>注意：如果使用w3向右或w3向左，请记住清除浮点数。删除div class =“ w3-clear”以了解原因。</p>
</div>
</body>
</html>
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