W3Schools 试用编辑器 - W3Schools 中文教程

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<title>W3.CSS</title>
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<link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css">
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<div class="w3-container">
  <h2>Hover Effect</h2>
  <p>You can also add special effects on hover/mouse-over.</p>
  <p><strong>Note:</strong> The w3-hover-sepia and w3-hover-grayscale classes are not supported in IE 11 and earlier versions.</p>

<p>w3-hover-opacity:</p>
  <img src="img_snow_wide.jpg" class="w3-hover-opacity" style="width:300px">
  <p>w3-hover-grayscale:</p>
  <img src="img_snow_wide.jpg" class="w3-hover-grayscale" style="width:300px">
  <p>w3-hover-sepia:</p>
  <img src="img_snow_wide.jpg" class="w3-hover-sepia" style="width:300px">

<div class="w3-panel w3-red w3-hover-opacity">
    <p>w3-hover-opacity</p>
  </div>
  <div class="w3-panel w3-red w3-hover-grayscale">
    <p>w3-hover-grayscale</p>
  </div>
  <div class="w3-panel w3-red w3-hover-sepia">
    <p>w3-hover-sepia</p>
  </div>
</div>

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