Reference for Velo support of new java(ecma)script features

I’ve been wrestling with text strings and replacements. Tried using replaceAll(), but apparently not yet supported (used regex replace instead). Read info post about ECMA 2019 support, but didn’t see how to check for new “Step 4” features being supported (or not).
So this is a general question about how I keep current with evolving javascript features in Velo – like replaceAll() – which I’m guessing is tied to what major browsers are supporting.