JSC is a standalone binary that may be used to debug JavascriptCore independently of Webcore.

Some advantages are:

• no need to compile or link all of QtWebkit (Webcore parts) when iterating on a fix.
• better understanding of what JavascriptCore APIs look like
• small jsc.cpp and jsc.pro which expedite debugging.
• on embedded platforms (Symbian and probably WinCE), you can actually get a debug binary out without the linker falling over.

Creating Javascript file to feed