Mozilla.org's SpiderMonkey

SpiderMoney is the name of the JavaScript engine from mozilla.org written completely in C. Depending on the configuration, the engine is even capable of compiling the JavaScript. Since it is Open Source and especially designed for usage in other products, you can find nowadays a lot of applications using SpiderMonkey as easy scripting environment. Mozilla browser itself (and therefore the Netscape browser also) is using this engine in their browsers. This engine extremely fast and reliable.

Early version built into the iPlanet Web Server does not seem to have an Error object.

Examples

The SpiderMonkey sources contain also a shell that is able to execute standalone JavaScript sources. You have to obtain the sources from the CVS or from a defined tarball and build the shell yourself. Depending on your OS you will have an executable js or jsshell.

You can run the examples or the JsUnit's TestSuite giving AllTests.js as argument running the shell.

Debugger

The SpiderMonkey sources also reference two versions of a debugger, but I did not get running one of them. If someone was more successful than me, please send a note.