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”.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “expandMenu”.
Stray end tag “source”.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value for attribute “srcset” on element “source”: Expected single descriptor but found extraneous descriptor “135h” at “…5798 180w 135h,”.
Element “img” is missing required attribute “src”.
The “sizes” attribute may be specified only if the “srcset” attribute is also present.
Bad value for attribute “srcset” on element “source”: Expected single descriptor but found extraneous descriptor “113h” at “…4131 180w 113h,”.
Bad value for attribute “srcset” on element “source”: Expected single descriptor but found extraneous descriptor “180h” at “…7105 180w 180h,”.
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “navigation” role is unnecessary for element “nav”.
The “banner” role is unnecessary for element “header”.
The first occurrence of ID “expandMenu” was here.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
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