Provelo.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “yw4” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “sm-utb” was here.
The first occurrence of ID “sm-inst” was here.
The first occurrence of ID “sm-fb” was here.
The first occurrence of ID “sm-vk” was here.
Errors:
Bad start tag in “img” in “head”.
Bad value “https://www.facebook.com/tr?id=<PixelID>&ev=PageView&noscript=1” for attribute “src” on element “img”: Illegal character in query: “<” is not allowed.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
The “font” element is obsolete. Use CSS instead.
The element “button” must not appear as a descendant of the “a” element.
Attribute “popupsize” not allowed on element “div” at this point.
Stray end tag “span”.
Duplicate ID “yw4”.
Duplicate ID “sm-utb”.
Duplicate ID “sm-inst”.
Duplicate ID “sm-fb”.
Duplicate ID “sm-vk”.
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