Howdesignlive.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Stray start tag “html”.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
The “center” element is obsolete. Use CSS instead.
Stray end tag “div”.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
No “p” element in scope but a “p” end tag seen.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
End tag “aside” seen, but there were open elements.
Unclosed element “div”.
Warnings:
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Empty heading.
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).
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
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