deprecated-elements-not-used
Obsolete non-stoppable elements (<blink>, <marquee>) must not be used
Checks that deprecated, non-standard HTML elements whose blinking/scrolling content cannot be paused, stopped, or hidden by the user (<blink>, <marquee>) are not present.
Applies to. Applies to any scan scope; whether it contains a <blink> or <marquee> element is always an answerable question. These are obsolete, non-standard HTML elements whose defining behavior (blinking or auto-scrolling text) has no built-in user mechanism to pause, stop, or hide it.
Expectation. Neither element is present. Since their movement can never be paused, stopped, or hidden by the user, presence is itself the violation, and absence is itself a pass -- there is no third, not-applicable case.
Examples
<p>Normal content</p>
No `<blink>` or `<marquee>` element anywhere, which satisfies the rule outright — there is no separate not-applicable case.
<marquee>Breaking news</marquee>
`<marquee>`'s auto-scrolling has no built-in way for a user to pause, stop, or hide it.