Vim autocomplete key bindings for closing & choosing

Question

I have j/k set to scroll in the autocomplete box as posted in this question: Scrolling in vim autocomplete box with jk movement keys

Now I want to map h to close the box without completion, and l to close with completion. Both should stay in insert mode. How can I do this?

Answer 1

inoremap <expr> h ((pumvisible())?("\<C-e>"):("h"))        
inoremap <expr> l ((pumvisible())?("\<C-y>"):("l"))