Number333.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.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Errors:
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “ontouchstart” not allowed on element “body” at this point.
Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.
Element “figcaption” not allowed as child of element “h1” in this context. (Suppressing further errors from this subtree.)
Attribute “ontouchstart” not allowed on element “a” at this point.
Bad value “” for attribute “width” on element “img”: The empty string is not a valid non-negative integer.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
The “itemprop” attribute was specified, but the element is not a property of any item.
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