Halfelf.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “scale” not allowed on element “img” at this point.
No “p” element in scope but a “p” end tag seen.
Duplicate ID “linear”.
The “center” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “itemref” attribute must not be specified on elements that do not have an “itemscope” attribute specified.
Attribute “href” not allowed on element “use” at this point.
Bad value “_new” for attribute “target” on element “a”: Reserved keyword “new” used.
Warnings:
The first occurrence of ID “linear” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
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