问题
I'm adding alt attributes to all my images to improve SEO/screen reader performance.
Per best practice, images that are purely aesthetic should have an empty alt attribute alt=""so screen readers skip over them. I'm in WordPress and noticed it does add alt to these descriptionless aesthetic images, but not alt="".
Does alt get read the same as alt="" by screen readers and search engine crawlers, or should I go in and programatically force an alt=""?
回答1:
Yes, it's the same: https://www.w3.org/TR/html5/syntax.html#attributes-0
Empty attribute syntax
Just the attribute name. The value is implicitly the empty string.
To me, that says that an attribute with no value is the same as having a value of empty string.
This answer says the same.
来源：https://stackoverflow.com/questions/44764441/is-alt-the-same-as-alt