Errors:
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Bad value “/info/cooperation?tmpl=component #developers” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/shop/all?axcode=2543359,2543362,2543363&title=Конструкторы-роботы%20с Arduino Nano&utm_source=main_page&utm_medium=banner&utm_campaign=lart” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
The “big” element is obsolete.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.
Duplicate ID “product-subbbuttons”.
Bad value “tel:+7 (495) 234-77-66” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
No space between attributes.
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Element “p” not allowed as child of element “h4” in this context. (Suppressing further errors from this subtree.)
No “li” element in scope but a “li” end tag seen.
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Stray end tag “ul”.
The “for” attribute of the “label” element must refer to a non-hidden form control.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “product-subbbuttons” was here.
The “form” role is unnecessary for element “form”.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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