This rule template can be used to create rules which will be triggered when a function matches a given regular expression.

For example, one can create a rule with the regular expression `(counter|ease)` to match `counter` and `ease` functions (to warn developers not to use them for some reasons for instance).

Note that, in order to match `counter` and `ease` functions regardless of the case, the `(?i)` modifier can be prepended to the expression, as in `(?i)(counter|ease)`.

See Java documentation for detailed regular expression syntax.

## stylelint Related Rules

- function-blacklist
- function-whitelist