Sorry about that I forgot to add `Show HN:` in the title, and post another one again.

Detto (AKA Pokemon ditto) is a library which has following features:

- Not just a deep clone, you could wrap anything in any paticular nested object. - You could watch change.

See usage: https://github.com/iendeavor/detto#usage

Real world example: https://github.com/iendeavor/form-validation.js