Tweentribune.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:fb” not allowed here.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Duplicate ID “header-logo”.
Duplicate ID “sign-in-options”.
Duplicate ID “teacher-sign-up”.
Duplicate ID “sign-in”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “header-logo” was here.
The first occurrence of ID “sign-in-options” was here.
The first occurrence of ID “teacher-sign-up” was here.
The first occurrence of ID “sign-in” was here.
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