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[css-properties-values-api-1] Export registered custom property, etc #1020

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tabatkins merged 1 commit into from
Feb 26, 2021
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[css-properties-values-api-1] Export registered custom property, etc #1020

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[css-properties-values-api-1] Export registered custom property, etc 
 - Export "registered custom property".
 - Export "universal syntax definition".
 - Fix a "the the".
 - When parsing against the syntax, we probably want invalid at
   computed-value time, and not guaranteed-invalid?

Somewhat related to: w3c/csswg-drafts#5370
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@andruud
andruud committed Feb 16, 2021
commit bc3cb022354f943841cae74ef141e9bf1d1e364c
9 changes: 5 additions & 4 deletions css-properties-values-api/Overview.bs
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Expand Up @@ -87,7 +87,7 @@ allow custom properties to directly impact paint and layout behaviours respectiv
Registered Custom Properties {#behavior-of-custom-properties}
=============================================================

A [=custom property=] can become a <dfn local-lt="registered">registered custom property</dfn>,
A [=custom property=] can become a <dfn export local-lt="registered">registered custom property</dfn>,
making it act more like a UA-defined property:
giving it a syntax that's checked by the UA,
an initial value,
Expand Down Expand Up @@ -209,7 +209,8 @@ or the [=guaranteed-invalid value=]).
Otherwise, attempt to [=CSS/parse=] the property's value
according to its registered syntax.
If this fails,
the [=computed value=] is the [=guaranteed-invalid value=].
the declaration is [=invalid at computed-value time=]
and the [=computed value=] is determined accordingly.
If it succeeds,
the [=computed value=] depends on the specifics of the syntax:

Expand Down Expand Up @@ -569,7 +570,7 @@ If omitted, the [=initial value=] of the property is the [=guaranteed-invalid va

Otherwise,
if the value of the 'syntax' descriptor is not the [=universal syntax definition=],
the following conditions must be met for the the ''@property'' rule to be valid:
the following conditions must be met for the ''@property'' rule to be valid:

* The 'initial-value' descriptor must be present.
* The 'initial-value' descriptor's value must [=consume a syntax definition|parse successfully=]
Expand Down Expand Up @@ -974,7 +975,7 @@ Parsing The Syntax String {#parsing-syntax}
: <dfn export>syntax definition</dfn>
:: An object consisting of a list of <a>syntax components</a>.

: <dfn>universal syntax definition</dfn>
: <dfn export>universal syntax definition</dfn>
:: A special syntax definition which accepts any valid token stream.

### Consume a Syntax Definition ### {#consume-syntax-definition}
Expand Down