About your example

[samcfc]

Hi

Could you provide an online demo please?

When I tried it by myself, nothing get inserted and then() is never called and of course I aint got any log in console (same on FF and Chrome)

Thanks, have a nice day

NB : I hope this is the right place for asking

[muyingzhi]

count () method errors exist, due to store.count () is asynchronous, so the packaging code should be like delete \ clear that treatment.