[Roboprog]

See if there is a fixed precision arithmetic library for JS? (similar to BigDecimal in Java / Groovy)

Homework: 1) Google for such; 2) see which one doesn't suck.

[vorg]

Groovy is a heavily marketed programming language that uses BigDecimal, just like its sister dynamic languages Clojure, Rhino/Nashorn, and Xtend also do. Only Java actually ships BigDecimal.

[Roboprog]

Yeah, I get that the base JRE is what actually provides the BigDecimal class in this case -- the other languages just use it. (as the default "decimal"-numeric type in the case of Groovy, rather than [Dd]ouble)