Airgas.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
Bad value “” for attribute “id” on element “button”: An ID must not be the empty string.
“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Duplicate attribute “class”.
End tag “div” seen, but there were open elements.
Unclosed element “ul”.
Duplicate ID “”.
Bad value “” for attribute “id” on element “form”: An ID must not be the empty string.
Bad value “” for attribute “id” on element “input”: An ID must not be the empty string.
Bad value “” for attribute “tabindex” on element “input”: The empty string is not a valid integer.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
End tag for “body” seen, but there were unclosed elements.
Unclosed element “div”.
Stray end tag “div”.
Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.
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.
Warnings:
The first occurrence of ID “” was here.
Empty heading.
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