Capsim.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Start tag “head” seen but an element of the same type was already open.
A document must not include more than one “meta” element with a “charset” attribute.
Element “title” not allowed as child of element “head” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad character “ ” after “<”. Probable cause: Unescaped “<”. Try escaping it as “<”.
Stray end tag “button”.
Start tag “a” seen but an element of the same type was already open.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Stray end tag “div”.
Warnings:
The “navigation” role is unnecessary for element “nav”.
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).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “type” attribute is unnecessary for JavaScript resources.
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