Intent to prototype and ship: Make -- a reserved custom property name

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Emilio Cobos Álvarez

Jun 4, 2021, 7:02:59 AM6/4/21
to Mozilla


In it was resolved that
-- should be an invalid custom property name. I plan to try aligning
with that change in bug 1467309.

There's some compat impact study looking at httparchive (thanks Lea!) in,
and I checked those pages and they seem like typos (the property is
defined, but never referenced, so there should be no rendering change).

So it seems worth a try.


Platform coverage: All

Preference: None

DevTools bug: N/A

Other browsers: We're the first ones in doing this, though I hope other
browsers would follow soon. I'll ping the relevant folks.

web-platform-tests: I changed the relevant WPTs in the patch.

-- Emilio
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