App下載
實(shí)例代碼( Tip: 登錄后體驗(yàn)更佳 )
<!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>悬停边框</h2>
    <div class="w3-panel w3-leftbar w3-border-white w3-hover-border-green">
        <p>白色（不可见）的左粗边框在悬停时变为绿色。</p>
    </div>
    <div class="w3-panel w3-light-grey w3-bottombar w3-border-white w3-hover-border-green">
        <p>白色（不可见）底边框粗，在悬停时变为绿色。</p>
    </div>
</div>
</body>
</html>
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