Pssi.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “id_ID” for attribute “lang” on element “html”: The language subtag “id_id” is not a valid language subtag.
Bad value “https://fonts.googleapis.com/css?family=Open+Sans:300,400,400i,600,700,700i,800|Quicksand:400,500” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “header” 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.
Stray end tag “svg”.
Warnings:
Attribute “"” is not serializable as XML 1.0.
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).
Indonesia ID