Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The “charset” attribute on the “script” element is obsolete.
Attribute “&” is not serializable as XML 1.0.
Attribute “priority:” is not serializable as XML 1.0.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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).
Errors:
Element “meta” is missing one or more of the following attributes: “content”, “property”.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
Element “meta” is missing required attribute “content”.
Bad start tag in “img” in “head”.
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 “noscript”.
Attribute “name” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “modulepreload”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Attribute “alt” not allowed on element “a” at this point.
Element “input” with attribute “type” whose value is “button” must have non-empty attribute “value”.
Element “style” not allowed as child of element “main” in this context. (Suppressing further errors from this subtree.)
Attribute “caas-response-to-media-queries-on-unauthorised-drone-sightings-in-the-vicinity-of-changi-airport” not allowed on element “a” at this point.
Attribute “response-to-media-queries-on-unauthorised-drone-sightings-in-the-vicinity-of-changi-airport” not allowed on element “a” at this point.
Attribute “events” not allowed on element “img” at this point.
Element “img” is missing required attribute “src”.
Attribute “aircraft” not allowed on element “img” at this point.
Attribute “systems” not allowed on element “img” at this point.
Attribute “familiarization” not allowed on element “img” at this point.
Attribute “training” not allowed on element “img” at this point.
Attribute “for” not allowed on element “img” at this point.
Attribute “investigators” not allowed on element “img” at this point.
Attribute “and” not allowed on element “img” at this point.
Attribute “legislations” not allowed on element “img” at this point.
Attribute “&” not allowed on element “img” at this point.
Attribute “advisory” not allowed on element “img” at this point.
Duplicate attribute “safety”.
Attribute “safety” not allowed on element “img” at this point.
Attribute “your” not allowed on element “img” at this point.
Attribute “priority:” not allowed on element “img” at this point.
Attribute “cabin” not allowed on element “img” at this point.
Attribute “tips” not allowed on element “img” at this point.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
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