100.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Potentially bad value “zh-cmn” for attribute “lang” on element “html”: The language tag “zh-cmn” is deprecated. Use “cmn” instead.
Attribute “"” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Errors:
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “a” at this point.
Bad value “true” for attribute “loop” on element “video”.
Element “object” is missing one or more of the following attributes: “data”, “type”.
Bad value “javascript:void” for attribute “href” on element “a”: syntax error
Attribute “key” not allowed on element “a” at this point.
Attribute “logo_size” not allowed on element “a” at this point.
Attribute “logo_type” not allowed on element “a” at this point.
Attribute “rel” not allowed on element “img” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
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