Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “origin-trial” for attribute “http-equiv” on element “meta”.
Forbidden code point U+0001.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Bad value “” for attribute “id” on element “h1”: An ID must not be the empty string.
Duplicate ID “”.
Bad value “” for attribute “id” on element “h2”: An ID must not be the empty string.
Attribute “autocomplete” not allowed on element “button” at this point.
Bad value “” for attribute “id” on element “span”: An ID must not be the empty string.
Bad value “” for attribute “id” on element “h3”: An ID must not be the empty string.
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Duplicate ID “thin-x”.
Duplicate ID “formstart”.
Attribute “placeholder” not allowed on element “li” at this point.
Attribute “placeholder” not allowed on element “a” at this point.
Attribute “placeholder” not allowed on element “select” at this point.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “charset” attribute on the “script” element is obsolete.
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “” was here.
Empty heading.
The first occurrence of ID “thin-x” was here.
The first occurrence of ID “formstart” was here.
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