Is there a way to detect which version of javascript this engine has? on console and browsers
for example i want to know conformance of
/usr/bin/js
/usr/bin/node
/usr/bin/ringo
/usr/bin/rhino
/usr/bin/seed
/usr/bin/gjs
and browsers i currently using, etc
are they Javascript 1.8.5 compatible or not, or which version of javascript they had