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

- WD

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.

Chrome

  1. 4 - 110: Not supported
  2. 111 - 125: Supported
  3. 126: Supported
  4. 127 - 129: Supported

Edge

  1. 12 - 110: Not supported
  2. 111 - 125: Supported
  3. 126: Supported

Safari

  1. 3.1 - 8: Not supported
  2. 9 - 17.4: Supported
  3. 17.5: Supported
  4. 17.6 - TP: Supported

Firefox

  1. 2 - 112: Not supported
  2. 113 - 127: Supported
  3. 128: Supported
  4. 129 - 131: Supported

Opera

  1. 9 - 97: Not supported
  2. 98 - 110: Supported
  3. 111: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 126: Supported

Safari on iOS

  1. 3.2 - 8.4: Not supported
  2. 9 - 17.4: Supported
  3. 17.5: Supported
  4. 17.6 - 18.0: Supported

Samsung Internet

  1. 4 - 21: Not supported
  2. 22 - 24: Supported
  3. 25: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 80: Supported

UC Browser for Android

  1. 15.5: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 126: Supported

Firefox for Android

  1. 127: Supported

QQ Browser

  1. 14.9: Not supported

Baidu Browser

  1. 13.52: Not supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported

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