Pse.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.
Errors:
“=” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
The element “a” must not appear as a descendant of the “button” element.
Element “div” is missing one or more of the following attributes: “role”.
Duplicate attribute “class”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
Attribute “allowscriptaccess” not allowed on element “iframe” at this point.
Text not allowed in element “iframe” in this context.
Attribute “pse” not allowed on element “a” at this point.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
The “aria-labelledby” attribute must point to an element in the same document.
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