Jmplanning.net W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
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”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
This document appears to be written in Japanese. Consider adding “lang="ja"” (or variant) to the “html” start tag.
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