try_w3effects_1 在线代码实例

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运行代码

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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>不透明度</h2>
    <p>w3-opacity 类添加透明度元素：</p>
    <p>正常:</p>
    <img src="https://atts.w3cschool.cn/img_snow_wide.jpg" style="width:300px">
    <p>w3-opacity-min:</p>
    <img src="https://atts.w3cschool.cn/img_snow_wide.jpg" class="w3-opacity-min" style="width:300px">
    <p>w3-opacity:</p>
    <img src="https://atts.w3cschool.cn/img_snow_wide.jpg" class="w3-opacity" style="width:300px">
    <p>w3-opacity-max:</p>
    <img src="https://atts.w3cschool.cn/img_snow_wide.jpg" class="w3-opacity-max" style="width:300px">
    <div class="w3-panel w3-red w3-opacity">
        <p>红色，不透明</p>
    </div>
    <div class="w3-panel w3-blue w3-opacity">
        <p>蓝色，不透明</p>
    </div>
    <div class="w3-panel w3-green w3-opacity">
        <p>绿色，不透明</p>
    </div>
</div>
</body>
</html>
 
 
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运行结果
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