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Re: [csswg-drafts] [cssom] Parsing value should not be seen as side effects free (#6451)

From: Oriol Brufau via GitHub <sysbot+gh@w3.org>
Date: Wed, 14 Jul 2021 23:44:11 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-880281269-1626306249-sysbot+gh@w3.org>
Shorthand expansion is not done in "parse a CSS value", it happens in https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-setproperty

> 8. If _property_ is a shorthand property, then for each longhand property _longhand_ that _property_ maps to, in canonical order, follow these substeps:
>     1. Let _longhand result_ be the result of [set the CSS declaration](https://drafts.csswg.org/cssom/#set-a-css-declaration) _longhand_ with the appropriate value(s) from _component value list_, with the _important_ flag set if _priority_ is not the empty string, and unset otherwise, and with the list of declarations being the [declarations](https://drafts.csswg.org/cssom/#cssstyledeclaration-declarations).
>     2. If _longhand_ result is true, let _updated_ be true. 

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