Fix selector-pseudo-element-no-unknown false positives for view-transition pseudo-elements

[danielroe]

What minimal example or steps are needed to reproduce the bug?

::view-transition-old(menu) {
  transform: rotate(0deg);
}

What minimal configuration is needed to reproduce the bug?

{
  "rules": {
    "selector-pseudo-element-no-unknown": true
  }
}

How did you run Stylelint?

https://stylelint.io/demo/#N4Igxg9gJgpiBcD4DcCWMDuBaALgJwEMA7AZ1R1QiKwgBsoAKAWxiIFcBKAAmAB0iuXfMRIAzCHibwueCDgI4YDAAywA5hwDc-AL78QAGhCjUtGADkCLBCBgAPKwAczAOjAkSh8FRNqbfAS5eWztFIigSYOkAbX5BQWCSHABPM1pUIhwsSCJfLCTiKAI8KGC4rgBdXS8c3wAxCSYFGwArEiovWEdPRACEkCTUmHTMqKCQWgUYJOCDcsSUtIys2tQ1fPlw4tKEccnFGZBqnSA

Which Stylelint-related dependencies are you using?

{
  "stylelint": "15.10.1"
}

What did you expect to happen?

No problems to be reported.

What actually happened?

The following problems were reported:

 172:1  ✖  Unexpected unknown pseudo-element selector "::view-transition-old"  selector-pseudo-element-no-unknown

Do you have a proposal to fix the bug?

Add the new pseudo element selectors to the list, alongside other experimental ones like target-text and spelling-error. Note: I've reported this as a bug but it may of course be a feature, depending on how you think about it.

Documentation: https://developer.mozilla.org/en-US/docs/Web/CSS/::view-transition

[jeddy3]

@danielroe Thank you for the clear report, using the template and for the pull request.

Note: I've reported this as a bug but it may of course be a feature, depending on how you think about it.

You were right to as we typical class these as false positive bugs.