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HTML <area> alt 属性

❮ HTML <area> 标签

示例

使用 alt 属性为图像地图中的每个区域指定备用文本

<map name="planetmap">
<area shape="rect" coords="0,0,82,126" href="sun.htm" alt="太阳">
<area shape="circle" coords="90,58,3" href="mercur.htm" alt="水星">
<area shape="circle" coords="124,58,8" href="venus.htm" alt="金星">
</map>
自己尝试 »

定义和用法

如果图像无法显示,则 alt 属性指定区域的备用文本。

如果用户由于某种原因(例如连接缓慢、src 属性中的错误或用户使用屏幕阅读器)无法查看图像,则 alt 属性提供图像的替代信息。

如果存在 href 属性,则 alt 属性是必需的。


浏览器支持

属性
alt

语法

<area alt="text">

属性值

描述
text 指定区域的备用文本,如果图像无法显示

❮ HTML <area> 标签
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