Coggle.it W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “p” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The “type” attribute is unnecessary for JavaScript resources.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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