Hnbmg.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Element name “fb:comments-count” cannot be represented as XML 1.0.
The first occurrence of ID “Layer_1” was here.
The first occurrence of ID “newsletter-form” was here.
The first occurrence of ID “mc-embedded-subscribe” was here.
The first occurrence of ID “fb-root” was here.
This document appears to be written in Vietnamese but the “html” start tag has “lang="en"”. Consider using “lang="vi"” (or variant) instead.
Errors:
Bad value “90fed63f58f540466b70a729-” for attribute “type” on element “script”: Subtype missing.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
Bad element name “fb:comments-count”: Code point “U+003A” is not allowed
Duplicate attribute “class”.
Duplicate ID “Layer_1”.
Duplicate ID “newsletter-form”.
Duplicate ID “mc-embedded-subscribe”.
Duplicate ID “fb-root”.
The “itemprop” attribute was specified, but the element is not a property of any item.
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