diff --git a/autoload/vital/__vital__/Experimental/UI/Popup.vim b/autoload/vital/__vital__/Experimental/UI/Popup.vim
index 5254e9f9b..050d6d7e6 100644
--- a/autoload/vital/__vital__/Experimental/UI/Popup.vim
+++ b/autoload/vital/__vital__/Experimental/UI/Popup.vim
@@ -1,8 +1,105 @@
 let s:save_cpo = &cpo
 set cpo&vim
 
+let s:_has_nvim = has('nvim')
+let s:_popups = {}
+
+function! s:is_supported() abort
+  return has('nvim') && exists('*nvim_open_win') || !has('nvim') && exists('*popup_create')
+endfunction
+
+" opt = {
+"   'contents': ['This', 'is', 'a', 'line'],
+"   'width': 5,
+"   'height': 5,
+"   'line': 1,
+"   'col': 1,
+" }
 function! s:create(opt) abort
-    echom 'create popup'
+  let data = {}
+  call s:_set_width(data, get(a:opt, 'width', 5))
+  call s:_set_height(data, get(a:opt, 'height', 5))
+  call s:_set_contents(data, get(a:opt, 'contents', []))
+  call s:_set_line(data, get(a:opt, 'line', 1))
+  call s:_set_col(data, get(a:opt, 'col', 1))
+  if s:_has_nvim
+    let buf = nvim_create_buf(0, 1)
+    call nvim_buf_set_lines(buf, 0, -1, 1, s:_get_contents(data))
+    let opt = {
+          \ 'relative': 'editor',
+          \ 'style': 'minimal',
+          \ 'width': data['width'],
+          \ 'height': data['height'],
+          \ 'row': data['line'],
+          \ 'col': data['col'],
+          \ 'focusable': 0,
+          \ }
+    let id = nvim_open_win(buf, 1, opt)
+  else
+    let id = popup_create(s:_get_contents(data), {
+          \ 'width': data['width'],
+          \ 'height': data['height'],
+          \ 'minwidth': data['width'],
+          \ 'minheight': data['height'],
+          \ 'maxwidth': data['width'],
+          \ 'maxheight': data['height'],
+          \ 'line': data['line'],
+          \ 'col': data['col'],
+          \ })
+  endif
+  let s:_popups[id] = data
+  return id
+endfunction
+
+function! s:_set_contents(data, contents) abort
+  let a:data['contents'] = a:contents
+endfunction
+
+function! s:_get_contents(data)
+  return get(a:data, 'contents', [])
+endfunction
+
+function! s:_set_width(data, width) abort
+  let a:data['width'] = a:width
+endfunction
+
+function! s:_get_width(data) abort
+  return a:data['width']
+endfunction
+
+function! s:_get_height(data) abort
+  return a:data['height']
+endfunction
+
+function! s:_set_height(data, height) abort
+  let a:data['height'] = a:height
+endfunction
+
+function! s:_set_line(data, line) abort
+  if s:_has_nvim
+    let a:data['line'] = a:line - 1
+  else
+    let a:data['line'] = a:line
+  endif
+endfunction
+
+function! s:_set_col(data, col) abort
+  if s:_has_nvim
+    let a:data['col'] = a:col - 1
+  else
+    let a:data['col'] = a:col
+  endif
+endfunction
+
+function! s:close(id)
+  if has_key(s:_popups, a:id)
+    if s:_has_nvim
+      silent! call nvim_win_close(a:id, 1)
+    else
+      silent! call popup_close(a:id)
+    endif
+    call remove(s:_popups, a:id)
+  endif
 endfunction
 
 let &cpo = s:save_cpo