Missing RegExp#unicodeSets

[Josh-Cena]

⚙ Compilation target

ESNext

⚙ Library

ESNext

Missing / Incorrect Definition

Missing RegExp#unicodeSets property

Sample Code

/[a]/v.unicodeSets

Documentation Link

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicodeSets

[fatcerberus]

tc39: uses meaningless letter v because "it's just u but better"
also tc39: calls corresponding property unicodeSets implying it's an additional feature rather than just an enhanced mode

[Josh-Cena]

implying it's an additional feature rather than just an enhanced mode

There are incompatibilities. It's not a strict superset of any existing feature. If it's just an "enhanced mode", a new flag won't be necessary. You can read the linked documentation to see what changed.

[fatcerberus]

Yeah, I get that, but unicodeSets implies it's supplemental, i.e. that v is something you specify in addition to u. At least the weird "we called it v because it's u+1" reasoning adequately explains why they're mutually exclusive. The naming scheme here is just weird.

[Josh-Cena]

There were discussions about whether v should still make unicode be true but it was eventually decided otherwise. Anyway that's pretty tangential