Globalguideline.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “contentinfo” role is unnecessary for element “footer”.
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 “async” not allowed on element “link” at this point.
Attribute “itemprop” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “http-equiv”.
The “center” element is obsolete. Use CSS instead.
Bad value for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Stray end tag “span”.
Stray end tag “font”.
The “itemprop” attribute was specified, but the element is not a property of any item.
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