Cocalc.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.
A table row was 4 columns wide, which is less than the column count established by the first row (5).
A table row was 0 columns wide, which is less than the column count established by the first row (5).
Errors:
Element “meta” is missing one or more of the following attributes: “content”, “property”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
Named character reference was not terminated by a semicolon. (Or “&” should have been escaped as “&”.)
Row 2 of a row group established by a “tbody” element has no cells beginning on it.
Row 3 of a row group established by a “tbody” element has no cells beginning on it.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “noscript” in this context. (Suppressing further errors from this subtree.)
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