Prolific.co W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Element “link” is missing one or more of the following attributes: “itemprop”, “rel”.
A “link” element with a “color” attribute must have a “rel” attribute that contains the value “mask-icon”.
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 “name” on element “input”: Must not be empty.
Element “input” is missing one or more of the following attributes: “type”.
Attribute “href” not allowed on element “button” at this point.
Bad value “noopener noreferer” for attribute “rel” on element “a”: The string “noreferer” is not a registered keyword.
Element “p” not allowed as child of element “cite” in this context. (Suppressing further errors from this subtree.)
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “script” must not have attribute “async” unless attribute “src” is also specified or unless attribute “type” is specified with value “module”.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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