JE, short for JavaScript::Engine (imaginative, isn't it?), is a pure-Perl JavaScript engine. Here are some of its strengths:
- Easy to install (no C compiler necessary*)
- Compatible with Data::Dump::Streamer, so the runtime environment can be serialised
- The parser can be extended/customised to support extra (or fewer) language features (not yet complete)
- All JavaScript datatypes can be manipulated directly from Perl (they all have overloaded operators)
JE's greatest weakness is that it's slow (well, what did you expect?). It also uses and leaks lots of memory, but that will be fixed.