图片alt属性的最佳做法 [英] Image alt attribute best practices
问题描述
< img>
标签上的 alt
属性的预期用途究竟是什么?
它应该描述图像,还是应该为屏幕阅读器(以及关闭图像的人)提供有意义的替换文本?
例如,如果我的网站上有一个简短的人物传记,并且包含他们的一张小照片,那么让视障用户有John Smith照片向他们宣读是否真的有意义?
p>
HTML 5规范有一个巨大部分。
基本上,如果你根本没有使用过图像,那么 alt
属性应该是文本的内容。如果您的图片纯粹是装饰性的,您可以使用 alt =
。描述出现在标题
属性中。
What exactly is the intended use of the alt
attribute on <img>
tags?
Should it describe the image, or should it provide meaningful replacement text for screen-readers (and people who have images turned off)?
For example, if I have a short biography of a person on my website, and include a small photo of them, is it really meaningful to visually impaired users to have "Photo of John Smith" read out to them?
The HTML 5 spec has a huge section on this.
Basically, the alt
attribute should be what would be there as text if you hadn't used an image at all. If your image is purely decorative, you can use alt=""
. A description goes in the title
attribute.
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