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HTML <img> alt 属性

❮ HTML <img> 标签

示例

带备用文本的图像

<img src="img_girl.jpg" alt="Girl in a jacket" width="500" height="600">
亲自尝试 »

定义和用法

必需的 alt 属性指定图像的备用文本,如果图像无法显示。

如果用户由于某种原因无法查看图像(由于连接缓慢、src 属性中的错误或用户使用屏幕阅读器),alt 属性提供图像的备用信息。

提示: 要为图像创建工具提示,请使用 title 属性!


浏览器支持

属性
alt

语法

<img alt="text">

属性值

描述
text 指定图像的备用文本。

alt 文本的准则

  • 如果图像包含信息,则文本应描述图像
  • 如果图像位于 <a> 元素中,则文本应说明链接指向的位置
  • 如果图像仅用于装饰,请使用 alt=""

❮ HTML <img> 标签
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