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什么是图片alt属性

seo百科视频 贵阳SEO 1827℃ 0评论

alt属性是一个用于网页语言HTML和XHTML、为输出纯文字的参数属性。它的作用是当HTML元素本身的物件无法被渲染时,就显示alt(替换)文字作为一种补救措施。
最佳的ALT属性
不太好的:
<img src=”puppy.jpg” alt=””/>
较好的:
<img src=”puppy.jpg” alt=”小狗”/>
最好的:
<img src=”puppy.jpg” alt=”斑点狗取回猎物”/>
应避免
<img src=”puppy.jpg” alt=”小狗 幼犬 小犬 幼狗 拾猎犬 拉布拉多猎犬 猎狼犬 赛特犬 导盲犬 杰克 拉塞尔犬 小猎犬狗粮 便宜的狗粮 小狗食物”/>

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