support treesitter

autoload/emmet.vim

@@ -379,8 +379,12 @@ function! emmet#getFileType(...) abort
     endif
   endif 
 
-  let pos = emmet#util#getcurpos()
-  let type = synIDattr(synID(max([pos[1], 1]), max([pos[2], 1]), 1), 'name')
+  if exists('g:loaded_nvim_treesitter') == 1
+    let type = luaeval('require"my_utils".get_node_at_cursor()')
+  else
+    let pos = emmet#util#getcurpos()
+    let type = synIDattr(synID(max([pos[1], 1]), max([pos[2], 1]), 1), 'name')
+  endif
 
   " ignore htmlTagName as it seems to occur too often
   if type == 'htmlTagName'

lua/my_utils.lua

@@ -0,0 +1,25 @@
+local M = {}
+
+M.get_node_at_cursor = function()
+	local ts_utils = require("nvim-treesitter.ts_utils")
+	local node = ts_utils.get_node_at_cursor()
+	if not node then
+		return nil
+	end
+
+	while node do
+		local node_type = node:type()
+
+		if node_type == "element" then
+			return "html"
+		elseif node_type == "stylesheet" then
+			return "css"
+		end
+
+		node = node:parent()
+	end
+
+	return ""
+end
+
+return M