Support :nth-child(An+B of S)
Nobody has claimed this yet.
- Dominant language
- Python
- Stars
- 310
- Forks
- 70
- Avg merge
- 2h 9m
- Merged PRs (30d)
- 4
Description
The current CCS 4 draft has :nth-child(An+B [of S]? ), extending :nth-child(An+B)
The :nth-child(An+B [of S]? ) pseudo-class notation represents the An+Bth element that matches the selector list S among its inclusive siblings.
The CSS Syntax Module [CSS3SYN] defines the An+B notation. If S is omitted, it defaults to *.
By passing a selector argument, we can select the Nth element that matches that selector. For example, the following selector matches the first three “important” list items, denoted by the .important class:
:nth-child(-n+3 of li.important)
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the CSS Selectors draft linked in the issue, then locate cssselect's selector parser and existing :nth-child handling. Check how the An+B expression and selector argument are represented, and verify that selectors such as :nth-child(-n+3 of li.important) parse and produce the expected result.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- css, python
- Domain
- frontend, web-dev
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100