Polyglotclub.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600,700|Roboto:300,400,500,700” for attribute “href” on element “link”: 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.
The “center” element is obsolete. Use CSS instead.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Duplicate ID “redirect”.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Potentially bad value “iw” for attribute “hreflang” on element “link”: The language subtag “iw” is deprecated. Use “he” instead.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “redirect” was here.
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