Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “type” attribute for the “style” element is not needed and should be omitted.
The first occurrence of ID “” was here.
Errors:
Attribute “href” not allowed on element “button” at this point.
Bad value “” for attribute “id” on element “img”: An ID must not be the empty string.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
The element “header” must not appear as a descendant of the “header” element.
Element “img” is missing required attribute “src”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “”.
CSS: “background-color”: “null” is not a “background-color” value.
The “center” element is obsolete. Use CSS instead.
Bad value “80%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
Bad value “420px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag “div” seen, but there were open elements.
Unclosed element “center”.
Stray end tag “img”.
The “itemtype” attribute must not be specified on elements that do not have an “itemscope” attribute specified.
Attribute “x-ms-format-detection” not allowed on element “div” at this point.
The element “header” must not appear as a descendant of the “footer” element.
The “itemprop” attribute was specified, but the element is not a property of any item.
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