Cognitiontoday.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
CSS: “filter”: “hue-rotation(90deg)” is not a “filter” value.
CSS: “height”: Too many values or values are not recognized.
Bad value “home follow noopener noreferrer” for attribute “rel” on element “a”: The string “follow” is not a registered keyword.
Bad value “follow noopener noreferrer” for attribute “rel” on element “a”: The string “follow” is not a registered keyword.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “bookmark follow noopener noreferrer” for attribute “rel” on element “a”: The string “follow” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “adsense”.
Warnings:
The “type” attribute for the “style” element is not needed and should be omitted.
The “type” attribute is unnecessary for JavaScript resources.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “adsense” was here.
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