Esmtb.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “off-canvas” not allowed on element “div” at this point.
Attribute “canvas” not allowed on element “div” at this point.
Bad value “navigation” for attribute “role” on element “ul”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “align” attribute on the “img” element is obsolete. Use CSS instead.
The “hspace” attribute on the “img” element is obsolete. Use CSS instead.
Element “meta” is missing required attribute “content”.
The “itemtype” attribute must not be specified on elements that do not have an “itemscope” attribute specified.
Duplicate attribute “target”.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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