selector list argument of :nth-child and :nth-last-child CSS pseudo-classes

- UNOFF

The newest versions of :nth-child() and :nth-last-child() accept an optional of S clause which filters the children to only those which match the selector list S. For example, :nth-child(1 of .foo) selects the first child among the children that have the foo class (ignoring any non-foo children which precede that child). Similar to :nth-of-type, but for arbitrary selectors instead of only type selectors.

IE

  1. 5.5 - 10
  2. 11

Edge

  1. 12 - 81
  2. 83

Firefox

  1. 2 - 75
  2. 76
  3. 77 - 78

Chrome

  1. 4 - 81
  2. 83
  3. 84 - 86

Safari

  1. 3.1 - 8
  2. 9 - 13
  3. 13.1
  4. TP

Opera

  1. 9 - 67
  2. 68

iOS Safari

  1. 3.2 - 8.4
  2. 9 - 13.3
  3. 13.4

Opera Mini

  1. all

Android Browser

  1. 2.1 - 4.4.4
  2. 81

Blackberry Browser

  1. 7
  2. 10

Opera Mobile

  1. 10 - 12.1
  2. 46

Chrome for Android

  1. 81

Firefox for Android

  1. 68

IE Mobile

  1. 10
  2. 11

UC Browser for Android

  1. 12.12

Samsung Internet

  1. 4 - 10.1
  2. 11.1

QQ Browser

  1. 10.4

Baidu Browser

  1. 7.12

KaiOS Browser

  1. 2.5

For support information for just :nth-child() see CSS3 selector support

Resources:
Chromium Issue 304163: Implement :nth-child(an+b of S) and :nth-last-child(an+b of S) pseudo-classes
Mozilla Bug 854148 - Support for :nth-child(An+B of sel), :nth-last-child(An+B of sel) pseudo-classes
MS Edge Platform Status: Under Consideration
MS Edge feature request on UserVoice