Prezi.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Errors:
Element “source” is missing required attribute “srcset”.
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The element “button” must not appear as a descendant of the “a” element.
Attribute “teams” not allowed on element “img” at this point.
Attribute “webex” not allowed on element “img” at this point.
Attribute “meet” not allowed on element “img” at this point.
An element with the attribute “role=tab” must not appear as a descendant of an element with the attribute “role=button”.
An element with the attribute “role=tab” must not appear as a descendant of the “a” element.
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