Clarify g:mucomplete#minimum_prefix_length

[andreypopp]

The doc states

The minimum number of (keyword) characters that must be present before the
cursor for automatic completion to be triggered.

But I found out that I need this to set to 0 so it works with manual Tab completion after an id with dot (ex. Result.|) when I use ALE's omnifunc. Otherwise Tab doesn't trigger the completion menu (note that I can trigger completion with C-x C-o just fine).

[lifepillar]

Is . in iskeyword? Usually, it is not considered a keyword character.

[BrokenHugh]

Hi, I just meet similar problem, I use tern_for_vim(javascript completion),the popup menu doesn't show up automatically when I press dot key(have to C-x C-o) manual).
And I couldn't find iskeyword in help document ,actually i dont know how to add . in iskeyword

[mg979]

@BrokenHugh maybe you could try

augroup insert_dot
  au!
  au InsertEnter * set iskeyword+=.
  au InsertLeave * set iskeyword-=.
augroup END

You can limit it to filetypes by changing * with *.js or else.

[BrokenHugh]

Thank you for your help. It works for me after set iskeyword+=.
But I found the other completion plugin jedi-vim doesn't need to do this by default or let g:jedi#popup_on_dot = 0 when I try to figure it out.
still weird.

[mg979]

jedi-vim actually remaps . in insert mode, to do its own stuff. It's a plugin-defined behaviour, vim doesn't do it on its own.

If it worked after pressing . and then <c-x><c-o>, maybe you can get the same by replacing the autogroup above with:

augroup insert_dot
  au!
  au FileType javascript inoremap <buffer> .   .<c-x><c-o>
augroup END

[lifepillar]

In autocompletion mode, MUcomplete by default triggers completion when there are at least two keyword characters in front of the cursor, where “keyword” is defined by the iskeyword options (see :help 'iskeyword'). Usually, . is not in iskeyword (but it may be added, as suggested above).

You may use g:mucomplete#can_complete to change MUcomplete's default behaviours, globally or for a specific filetype.

I have been asked in the past to enable completion after a dot in C/C++ and Python, so for such languages completion is already triggered after a dot. Which filetype(s) are you working on?