Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Attribute “ref” not allowed on element “header” at this point.
Attribute “@click” not allowed on element “button” at this point.
Attribute “@click” not allowed on element “li” at this point.
Attribute “v-for” not allowed on element “li” at this point.
Attribute “:href” not allowed on element “a” at this point.
Attribute “v-if” not allowed on element “img” at this point.
Attribute “:src” not allowed on element “img” at this point.
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “v-else” not allowed on element “div” at this point.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Stray doctype.
Duplicate ID “Layer_1”.
Duplicate ID “Layer_1_1_”.
Duplicate ID “Isolation_Mode”.
Duplicate ID “Layer_1_2_”.
Duplicate ID “Check_mark_1_”.
Attribute “alt” not allowed on element “a” at this point.
Duplicate ID “Check_mark”.
Stray end tag “header”.
No “p” element in scope but a “p” end tag seen.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Attribute “xmlns:xl” not allowed here.
Attribute “xmlns:dc” not allowed here.
Element “dc:date” not allowed as child of element “metadata” in this context. (Suppressing further errors from this subtree.)
Warnings:
Attribute “@click” is not serializable as XML 1.0.
Attribute “:href” is not serializable as XML 1.0.
Attribute “:src” is not serializable as XML 1.0.
The first occurrence of ID “Layer_1” was here.
The first occurrence of ID “Layer_1_1_” was here.
The first occurrence of ID “Isolation_Mode” was here.
The first occurrence of ID “Layer_1_2_” was here.
The first occurrence of ID “Check_mark_1_” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “Check_mark” was here.
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).
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Attribute with the local name “xmlns:xl” is not serializable as XML 1.0.
Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.
Element name “dc:date” cannot be represented as XML 1.0.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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