Helpstay.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Bad value “https://www.w3.org/2000/svg” for the attribute “xmlns” (only “http://www.w3.org/2000/svg” permitted here).
Attribute “xmlns:sketch” not allowed here.
Bad value “https://www.w3.org/1999/xlink” for the attribute “xmlns:link” (only “http://www.w3.org/1999/xlink” permitted here).
Duplicate ID “Layer_1”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “arrow”.
Duplicate ID “clip”.
Duplicate ID “star-gradient”.
No “p” element in scope but a “p” end tag seen.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “xmlns” is not serializable as XML 1.0.
Attribute with the local name “xmlns:sketch” is not serializable as XML 1.0.
Attribute “xmlns:xlink” with a value other than “http://www.w3.org/1999/xlink” is not serializable as XML 1.0 without changing document semantics.
The first occurrence of ID “Layer_1” was here.
The first occurrence of ID “arrow” was here.
The first occurrence of ID “clip” was here.
The first occurrence of ID “star-gradient” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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