Happycoding.io W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Start tag “a” seen but an element of the same type was already open.
No space between attributes.
“<” in attribute name. Probable cause: “>” missing immediately before.
Attribute “......” not allowed on element “img” at this point.
Attribute “(<a” not allowed on element “img” at this point.
Attribute “href” not allowed on element “img” at this point.
Stray end tag “a”.
Duplicate ID “twitter-img”.
Duplicate ID “facebook-img”.
Duplicate ID “github-img”.
Warnings:
Attribute “......” is not serializable as XML 1.0.
Attribute “(<a” is not serializable as XML 1.0.
The first occurrence of ID “twitter-img” was here.
The first occurrence of ID “facebook-img” was here.
The first occurrence of ID “github-img” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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