JSPspEmu Git (2014/05/13) is released. JSPspEmu is a PSP emulator made using javascript (actually typescript). It will work with any modern browser. Though the first version work only works with Chrome (desktop and android). At this point it can run some demos.

JSPspEmu Git Changelog:
- Small update
- Huge speedup for all games
- Compensating time between the queued threadmanager and the actual time after queuing
- Fixed display now updating vblankCount (now Tales of Eternia starts working)
- Fixed Tales of Eternia first textures, and huge speedup with PixelConvert.updateT4.
- Improved Memory.copy speed using native copying
- Some more stubs
- Small update
- Fixed shadows and lights in Astonishia Story

Try online: JSPspEmu Git (2014/05/13)
Source: Here