What does jsHelpers do then? I apologize for not providing more details here. You can find it in documentation. All documentation is in Chinese, and I think samples in it might help you understand what these helpers do. I will provide documentation in other languages in the future.
The latest release is 0.9.8. In this release, all source code and unit tests are ready. I'm working on documentation now. I will release 1.0 when there is a stable version with complete docs.