JSPspEmu Git (2014/04/06) 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:
* - Updated csproj
* - More work
* - Added goldminer game sample
- Added setImmediate polyfill
- Support for swizzled textures
- Improved a bit texture cache
* - Added TrigWars
- Some fixes
* - Fixed SWL/SWR
- More work
* - More work

Try online: JSPspEmu Git (2014/04/06)
Source: Here