Create checked list dropdown with groups - knockoutjs
please look at this example of drop down checkbox list im working on..
the problem is that im loosing the observable power by unmapping the object
what is the "knockout way" to solve this issue ?
That is definitely not the knockout way of doing things - you're fighting with knockout the whole way, which is only going to cause pain.
Here's a simple example showing how to use the mapping plugin with the click event being handled by jQuery:
And here is a more complex example with the click event handled by knockout bindings: