Awesome

asyncomplete-emmet.vim

emmet-vim completion source for asyncomplete.vim

Install

Plug 'prabirshrestha/asyncomplete.vim'
Plug 'prabirshrestha/asyncomplete-emmet.vim'

Register asyncomplete-omni.vim

au User asyncomplete_setup call asyncomplete#register_source(asyncomplete#sources#emmet#get_source_options({
    \ 'name': 'emmet',
    \ 'whitelist': ['html'],
    \ 'completor': function('asyncomplete#sources#emmet#completor'),
    \ }))

Note

Refer to emmet-vim docs for information no how to expand emmet-vim completion items.