Onlineschools.org W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute for the “style” element is not needed and should be omitted.
The “type” attribute is unnecessary for JavaScript resources.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “Accept-CH” for attribute “http-equiv” on element “meta”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “legend” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Attribute “step” not allowed on element “label” at this point.
Attribute “step” not allowed on element “span” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
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