Errors:
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Duplicate attribute “prefix”.
Bad value “lang=” for attribute “lang” on element “html”: The language subtag “lang=” is not a valid language subtag.
Attribute “en-us"” not allowed on element “html” at this point.
Attribute “"” not allowed on element “html” at this point.
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 “icon shortcut” for attribute “rel” on element “link”: If the “shortcut” keyword is present, the “rel” attribute's entire value must be “shortcut icon”.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “ul”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Stray start tag “script”.
Cannot recover after last error. Any further errors will be ignored.
Warnings:
Attribute “en-us"” is not serializable as XML 1.0.
Attribute “"” is not serializable as XML 1.0.
Consider avoiding viewport values that prevent users from resizing documents.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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