Spdrdogs.org W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Attribute “facebook"” is not serializable as XML 1.0.
Errors:
CSS: Unrecognized at-rule “@mediaonly”
CSS: Parse Error.
CSS: “letter-spacing”: “letter-spacing” is not a “letter-spacing” value.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “spdr” not allowed on element “a” at this point.
Attribute “on” not allowed on element “a” at this point.
Attribute “facebook"” not allowed on element “a” 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.
The “itemprop” attribute was specified, but the element is not a property of any item.
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