Life-price.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
No space between attributes.
Saw “=” when expecting an attribute name. Probable cause: Attribute name missing.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “="_parent"” not allowed on element “a” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate attribute “rel”.
The “center” element is obsolete. Use CSS instead.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Empty heading.
Attribute “="_parent"” is not serializable as XML 1.0.
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