Strange :not(#\\#) selector

[Ustasjs]

I checked out your webpack example and also built my own small setup to check the generated style and I found out that you use :not(#/#) selector widely in the generated code.

Code from your webpack example @keyframes xgnty7z-B{0%{opacity:.25;}100%{opacity:1;}} .x1oz5o6v:hover:not(#\#){background:red} .xeuoslp:not(#\#):not(#\#){animation-name:xgnty7z-B} .x1lliihq:not(#\#):not(#\#){display:block} .x78zum5:not(#\#):not(#\#){display:flex} .x1hm9lzh:not(#\#):not(#\#){margin-inline-start:10px} .x1egiwwb:not(#\#):not(#\#):not(#\#){height:500px} .xlrshdv:not(#\#):not(#\#):not(#\#){margin-top:99px} .xh8yej3:not(#\#):not(#\#):not(#\#){width:100%} .x3hqpx7:not(#\#):not(#\#):not(#\#){width:50%}

Could you provide some insight into using ## as a selector in the styles generated by stylex? In standard CSS, ## appears to be a selector for an element with id="#" that doesn't make much sense, and I'm curious about its purpose or significance within stylex generated styles. Do you use it to increase css specificity? Any clarification on this aspect would be greatly appreciated.

[necolas]

This has been answered several times before if you search issues

https://github.com/search?q=repo%3Afacebook%2Fstylex+not+selector&type=issues