How to make the completion menu pop up automatically?

win7+gvim.
has been installed

AutoComplPop   neocomplcache.vim  ultisnips  vim-snippets

setting of _ gvimrc

filetype plugin indent on
let mapleader=","
let g:user_emmet_leader_key =","
set spell
chdir d:workspace

let gveUltiSnipsExpandTrigger = "< let c >"
UltiSnipsJumpForwardTrigger= "< cmerb >"
let glussUltiSnipsJumpBackwardTrigger= "< Cmerz >"
"
UltiSnipsEditSplitSplit =" vertical > UltiSnipsEditSplitSplit = "UltiSnipsEditSplit"

set nocp
autocmd FileType javascript set omnifunc=javascriptcomplete-sharpCompleteJS
set completeopt=longest,menu

Why do I enter

when editing js documents

document.
there is no completion automatic pop-up. You must enter ctrl+x ctrl+o?

I added

to _ gvimrc
imap . <C-X><C-O>

enter document.. The completion menu can be popped up. Can you enter
document.? After the automatic pop-up completion menu?

Vim
Mar.11,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1beb217-31a70.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1beb217-31a70.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?