Timer-tab.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The manifest-based application cache feature is obsolete. Consider using service workers instead.
Element name “g:plusone” cannot be represented as XML 1.0.
Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.
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 “itemprop” not allowed on element “meta” at this point.
Attribute “min” not allowed on element “input” at this point.
Attribute “max” not allowed on element “input” at this point.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Element “g:plusone” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
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