w3css 在线编辑器 | w3css代码测试

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.cainiaomax.com/w3css/4/w3.css">
<body>

<div class="w3-container">
  <h2>灰度效果</h2>
  <p>w3-grayscale 类为元素添加灰度效果。</p>
  <p><strong>注意：</strong> IE 11 及更早版本不支持 w3-grayscale 类。</p>

<p>正常：</p>
  <img src="img_snow_wide.jpg" alt="Snow" style="width:300px">
  <p>w3-grayscale-min:</p>
  <img src="img_snow_wide.jpg" alt="Snow" class="w3-grayscale-min" style="width:300px">
  <p>w3-grayscale:</p>
  <img src="img_snow_wide.jpg" alt="Snow" class="w3-grayscale" style="width:300px">
  <p>w3-grayscale-max (black and white):</p>
  <img src="img_snow_wide.jpg" alt="Fjords" class="w3-grayscale-max" style="width:300px">

<div class="w3-panel w3-red w3-grayscale">
    <p>Red with grayscale</p>
  </div>
  <div class="w3-panel w3-blue w3-grayscale">
    <p>Blue with grayscale</p>
  </div>
  <div class="w3-panel w3-green w3-grayscale">
    <p>Green with grayscale</p>
  </div>
</div>

</body>
</html>

报个问题: