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Specify a pattern for custom properties.

a { --foo-: 1px; }
/** ↑
* The pattern of this */

The message secondary option can accept the arguments of this rule.



A string will be translated into a RegExp like so new RegExp(yourString) — so be sure to escape properly.

Given the string:


The following patterns are considered problems:

:root { --boo-bar: 0; }

The following patterns are not considered problems:

:root { --foo-bar: 0; }