Springstudios.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Attribute “display:” is not serializable as XML 1.0.
Attribute “block;""” is not serializable as XML 1.0.
Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Start tag “a” seen but an element of the same type was already open.
Stray end tag “a”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “br”.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “display:” not allowed on element “form” at this point.
Attribute “block;""” not allowed on element “form” at this point.
United States US