Taskandpurpose.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “ref” not allowed on element “link” at this point.
Element “link” is missing one or more of the following attributes: “itemprop”, “property”, “rel”.
Bad value “true” for attribute “async” on element “script”.
Duplicate attribute “class”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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