• selector-pseudo-class-no-unknown
• selector-pseudo-class-disallowed-list
• selector-pseudo-class-allowed-list

Describe the issue. Is it a bug or a feature request (new rule, new option, etc.)?

https://developer.mozilla.org/en-US/docs/Web/CSS/:first
https://developer.mozilla.org/en-US/docs/Web/CSS/:right
https://developer.mozilla.org/en-US/docs/Web/CSS/:left
https://developer.mozilla.org/en-US/docs/Web/CSS/:blank

cf

Which rule, if any, is this issue related to?

selector-pseudo-class-*

What CSS is needed to reproduce this issue?

e.g.

@page :first {
  margin-left: 50%;
  margin-top: 50%;
}

What stylelint configuration is needed to reproduce this issue?

No matter.

Which version of stylelint are you using?

No matter.

How are you running stylelint: CLI, PostCSS plugin, Node API?

No matter.

Does your issue relate to non-standard syntax (e.g. SCSS, nesting, etc.)?

No matter.

What did you expect to happen?

Check pseudo-classes in this rules

What actually happened (e.g. what warnings or errors you are getting)?

Now we have not check.