Dudaone.com W3C HTML Markup Validation
HTML markup errors and warnings
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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.
Errors:
Attribute “x” not allowed on element “symbol” at this point.
Attribute “y” not allowed on element “symbol” at this point.
Attribute “version” not allowed on element “symbol” at this point.
Attribute “redirecturl” not allowed on element “a” at this point.
Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Attribute “trans” not allowed on element “li” at this point.
Attribute “trans” not allowed on element “div” at this point.
Element “style” not allowed as child of element “section” in this context. (Suppressing further errors from this subtree.)
Duplicate attribute “data-hide”.
Stray end tag “span”.
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Stray end tag “div”.
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