w3css-o5cu3dxe_8 在线代码实例

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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>显示和隐藏</h2>
    <p>w3-hide类隐藏一个元素（显示：无）。</p>
    <p>w3-show类显示一个元素（显示：块）。</p>
    <p class="w3-show">我被显示。</p>
    <p class="w3-hide">我被隐藏。</p>
</div>
</body>
</html>
 
 
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运行结果
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