How can we improve the Microsoft Edge developer experience?

Implement nth-child(An+B of sel) and nth-last-child(An+B of sel) pseudo classes

Steps to reproduce the problem:
1. Open the testcase https://bugzilla.mozilla.org/attachment.cgi?id=8443862 in Edge.

What is the expected behavior?
The test should pass.

What went wrong?
The test failed, indicating that Edge does not support the relevant nth-child(An+B of sel) and nth-last-child(An+B of sel) pseudo classes.

Specification: https://drafts.csswg.org/selectors-4/#the-nth-child-pseudo
Chrome Bug: https://bugs.chromium.org/p/chromium/issues/detail?id=304163
Firefox Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=854148
Webkit Status: https://webkit.org/status/#feature-css-selector-:nth-child(an+b-of-selector-list)-and-:nth-last-child(an+b-of-selector-list)
Can I Use: http://caniuse.com/#feat=css-nth-child-of

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    Bardi HarborowBardi Harborow shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

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