Stpete.org W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
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.
Empty heading.
Errors:
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Bad value “swipebox” for attribute “rel” on element “a”: The string “swipebox” is not a registered keyword.
No space between attributes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “youtube” for attribute “rel” on element “a”: The string “youtube” is not a registered keyword.
Element “div” not allowed as child of element “small” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
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