RegExp named capture groups don't get transpiled

[cascornelissen]

TypeScript Version:
3.7.2 (3.7.4 and nightly (3.8.0) as well)

Search Terms:
Named capture groups
Named capturing groups
Regex
ES2018.RegExp

Expected behavior:
The named capture group in the regex gets transpiled to the correct target (es5 in our case). Something like what @babel/plugin-transform-named-capturing-groups-regex does?

Actual behavior:
The named capture group ends up in the compiled code while only Chrome currently supports this.

Related Issues:
#31241

Code

const regex = /^(?<name>[A-Za-z]+)/;
const match = regex.exec('MatchThis-NotThis');
console.log(match);

Live Playground
Here

Additional information
I'm not 100% sure if this is something that TypeScript actually should be doing so if that's not the case I'd like to get some details on how to properly transpile this.

[RyanCavanaugh]

We don't currently inspect RegEx bodies to see if they're compatible with the current target, since this is the first (?) new syntax in a long time.