Youngjump.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “imagetoolbar” for attribute “http-equiv” on element “meta”.
Bad value “pragma” for attribute “http-equiv” on element “meta”.
Bad value “cache-control” for attribute “http-equiv” on element “meta”.
Attribute “max-count” not allowed on element “div” at this point.
Bad value “2019/02/28” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “2019/02/25” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “2019/02/21” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “2019/02/14” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
The “itemprop” attribute was specified, but the element is not a property of any item.
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