51 lines
1.6 KiB
Markdown
51 lines
1.6 KiB
Markdown
---
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title: Image Opacity and Transparency
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localeTitle: 图像不透明度和透明度
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---
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## 图像不透明度和透明度
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`opacity`属性允许您通过降低图像的`opacity`来使图像透明。
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`Opacity`的值介于0.0和1.0之间。
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1.0是任何图像的默认值。它是完全不透明的。
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例
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```css
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img {
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opacity: 0.3;
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}
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```
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Include ```filter: alpha(opacity=x)``` for IE8 and earlier. The x takes a value from 0-100.
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```
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CSS img { 不透明度：0.3; filter：alpha（opacity = 30）; }
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```
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Here's an example of an image set to the parameters in the example above.
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You can pair ```opacity``` with ```:hover``` to create a dynamic mouse-over effect.
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Example:
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```
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CSS img { 不透明度：0.3; filter：alpha（opacity = 30）; } img：hover { 不透明度：1.0; filter：alpha（opacity = 100）; }
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```
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[A codepen example to show a transparent image turning opaque on hover](https://codepen.io/lvcoulter/full/JrzxXa/)
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<!--I cannot figure out how to embed a Codepen. I would really like to know-->
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You can create the opposite effect with less code since the image is 1.0 opacity by default
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Example:
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```
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CSS img：hover { 不透明度：0.3; filter：alpha（opacity = 30）; } \`\`\` [用于显示鼠标悬停透明度的codepen示例](https://codepen.io/lvcoulter/full/xXBQoR/)
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#### 更多信息：
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\-w3schools.com [CSS不透明度/透明度](https://www.w3schools.com/css/css_image_transparency.asp)
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\-MDN web docs [Opacity](https://developer.mozilla.org/en-US/docs/Web/CSS/opacity) |