Tiketa.lt W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.
Stray end tag “a”.
Bad value “navigation” for attribute “role” on element “ul”.
Bad value “” for attribute “id” on element “a”: An ID must not be the empty string.
Attribute “value” not allowed on element “form” at this point.
Duplicate ID “”.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Bad value “” for attribute “method” on element “form”.
The element “button” must not appear as a descendant of the “a” element.
Duplicate ID “loading”.
No space between attributes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “” was here.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The first occurrence of ID “loading” was here.
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