Multiple elements on :nth-col and :nth-last-col are missing or incorrect

[yarusome]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/CSS/:nth-col

What specific section or headline is this issue about?

Title, specifications, bowser compatibility

What information was incorrect, unhelpful, or incomplete?

1. The two pseudo-classes are named as :nth-col and :nth-last-col both in the titles and in the left navigation column, inconsistent with :nth-child(), :nth-last-child(), :nth-of-type(), :nth-last-of-type().
2. No experiment icon shows on the left of the two pseudo-classes in the navigation column.
3. No specification links.
4. No BCD data.

What did you expect to see?

1. The two pseudo-classes be named as :nth-col() and :nth-last-col() both in the titles and in the left navigation column.
2. Experiment icons on the left of the two pseudo-classes in the navigation column.
3. Specification links pointing to Selector Level 4 #the-nth-col-pseudo and Selector Level 4 #nth-last-col-pseudo.
4. BCD data on the two pseudo-classes.

Do you have any supporting links, references, or citations?

No response

Do you have anything more you want to share?

No response

[KianYang-Lee]

Good day, @sideshowbarker I can take this issue and make relevant fixes for point 1, 2 and 3, however for point 4, when I check at https://unpkg.com/@mdn/[email protected]/data.json , there's yet to be BCD for these two selector.

Spec link for the two selecters are:

• https://w3c.github.io/csswg-drafts/selectors/#nth-col-pseudo
• https://w3c.github.io/csswg-drafts/selectors/#nth-last-col-pseudo

Would also like to know which file to edit in order to change the nav content, thank you.

[sideshowbarker]

@KianYang-Lee Yes — resolving this issue should also include updating the BCD data

[KianYang-Lee]

Well @sideshowbarker I can help to resolve this issue if you can provide a simple guide or link on how to update the BCD data, as this is my first time doing this.

[dawei-wang]

Hi @KianYang-Lee, here is a link on how to update BCD: https://github.com/mdn/browser-compat-data/blob/main/docs/contributing.md#updating-the-compat-data
The writing guidelines page may also be helpful. https://developer.mozilla.org/en-US/docs/MDN/Writing_guidelines/Page_structures/Compatibility_tables

[KianYang-Lee]

OK please assign me and I will work on this later today, thanks

[KianYang-Lee]

Refering to here Data guidelines for BCD, since as of now no browser supports this feature, it should not be added into BCD (proposed in mdn/browser-compat-data#10619). So, point 2, 3 and 4 is not applicable anymore in this case as they should not be included in BCD yet. I have made a PR which should partially resolve this issue, for now at least.