Zhihu.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
CSS: “height”: “constant(safe-area-inset-top)” is not a “height” value.
CSS: “height”: “env(safe-area-inset-top)” is not a “height” value.
CSS: “height”: “constant(safe-area-inset-bottom)” is not a “height” value.
CSS: “height”: “env(safe-area-inset-bottom)” is not a “height” value.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Stray start tag “script”.
Warnings:
The “main” role is unnecessary for element “main”.
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