SpiderMonkey 24 is the most recent standalone source code release. It implements JavaScript 1.8.5, and it is largely the same engine that shipped with Firefox 24.
Extracted automatically from Spidermonkey homepage
brew install spidermonkey
The following 2 dependencies will be installed if you install Spidermonkey:
This formula is required by Couchdb, Jsawk, Plowshare, and 1 other formulas.
This formula is in confict with