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…in reply to @ckirknielsen
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@at-root
is required so Sass doesn't compile toh1:is(…) *, h2:is(…) *
and so on, due to the ampersand not being the "native" one (not sure how to explain this better!). - We wrap the&
in Sass's interpolation syntax, as without it, it would compile to:is(&)
. Neat.