diff --git a/autoload/emmet/lang/css.vim b/autoload/emmet/lang/css.vim
index 8217c4d..b3977ab 100644
--- a/autoload/emmet/lang/css.vim
+++ b/autoload/emmet/lang/css.vim
@@ -368,3 +368,7 @@ endfunction
 function! emmet#lang#css#removeTag() abort
   " nothing to do
 endfunction
+
+function! emmet#lang#css#mergeLines() abort
+  " nothing to do
+endfunction
diff --git a/autoload/emmet/lang/elm.vim b/autoload/emmet/lang/elm.vim
index 5bb5331..ce663bd 100644
--- a/autoload/emmet/lang/elm.vim
+++ b/autoload/emmet/lang/elm.vim
@@ -208,7 +208,34 @@ function! emmet#lang#elm#toString(settings, current, type, inline, filters, item
   endif
 
   let str .= "\n"
-
   return str
-
+endfunction
+
+function! emmet#lang#elm#imageEncode() abort
+endfunction
+
+function! emmet#lang#elm#parseTag(tag) abort
+  return {}
+endfunction
+
+function! emmet#lang#elm#toggleComment() abort
+endfunction
+
+function! emmet#lang#elm#balanceTag(flag) range abort
+endfunction
+
+function! emmet#lang#elm#moveNextPrevItem(flag) abort
+  return emmet#lang#elm#moveNextPrev(a:flag)
+endfunction
+
+function! emmet#lang#elm#moveNextPrev(flag) abort
+endfunction
+
+function! emmet#lang#elm#splitJoinTag() abort
+endfunction
+
+function! emmet#lang#elm#removeTag() abort
+endfunction
+
+function! emmet#lang#elm#mergeLines() abort
 endfunction
diff --git a/autoload/emmet/lang/haml.vim b/autoload/emmet/lang/haml.vim
index ccec8ad..7ea97d1 100644
--- a/autoload/emmet/lang/haml.vim
+++ b/autoload/emmet/lang/haml.vim
@@ -332,3 +332,6 @@ function! emmet#lang#haml#removeTag() abort
     exe sn ',' (n-1) 'delete'
   endif
 endfunction
+
+function! emmet#lang#haml#mergeLines() abort
+endfunction
diff --git a/autoload/emmet/lang/html.vim b/autoload/emmet/lang/html.vim
index b6445f7..e9a23f3 100644
--- a/autoload/emmet/lang/html.vim
+++ b/autoload/emmet/lang/html.vim
@@ -955,10 +955,8 @@ function! emmet#lang#html#removeTag() abort
     call setpos('.', [0, pos1[0], pos1[1], 0])
     let pos2 = searchpairpos('<'. tag_name[1:] . '\>[^/>]*>', '', '</' . tag_name[1:] . '>', 'W')
   else
-	  echomsg string(tag_name)
     let pos2 = searchpairpos('<'. tag_name . '[^/>]*>', '', '</' . tag_name . '>', 'W')
   endif
-  echomsg string(pos2)
   if pos2 == [0, 0]
     return
   endif
@@ -968,12 +966,44 @@ function! emmet#lang#html#removeTag() abort
     call emmet#util#setContent(block, '')
     call setpos('.', [0, block[0][0], block[0][1], 0])
     return
+  endif
+  if block[0][0] > 0
+    call setpos('.', [0, block[0][0]-1, block[0][1], 0])
   else
-    if block[0][0] > 0
-      call setpos('.', [0, block[0][0]-1, block[0][1], 0])
-    else
-      call setpos('.', curpos)
-      return
-    endif
+    call setpos('.', curpos)
+  endif
+endfunction
+
+function! emmet#lang#html#mergeLines() abort
+  let curpos = emmet#util#getcurpos()
+  let mx = '<\(/\{0,1}[a-zA-Z][-a-zA-Z0-9:_\-]*\)\%(\%(\s[a-zA-Z][a-zA-Z0-9]\+=\%([^"'' \t]\+\|"[^"]\{-}"\|''[^'']\{-}''\)\s*\)*\)\s*\%(/\{0,1}\)>'
+
+  let pos1 = searchpos(mx, 'bcnW')
+  let content = matchstr(getline(pos1[0])[pos1[1]-1:], mx)
+  let tag_name = substitute(content, '^<\(/\{0,1}[a-zA-Z][a-zA-Z0-9:_\-]*\).*$', '\1', '')
+  let block = [pos1, [pos1[0], pos1[1] + len(content) - 1]]
+  if content[-2:] ==# '/>' && emmet#util#cursorInRegion(block)
+    call setpos('.', [0, block[0][0], block[0][1], 0])
+    return
+  endif
+  if tag_name[0] ==# '/'
+    let pos1 = searchpos('<' . tag_name[1:] . '[^a-zA-Z0-9]', 'bcnW')
+    call setpos('.', [0, pos1[0], pos1[1], 0])
+    let pos2 = searchpairpos('<'. tag_name[1:] . '\>[^/>]*>', '', '</' . tag_name[1:] . '>', 'W')
+  else
+    let pos2 = searchpairpos('<'. tag_name . '[^/>]*>', '', '</' . tag_name . '>', 'W')
+  endif
+  if pos2 == [0, 0]
+    return
+  endif
+  let pos2 = searchpos('>', 'neW')
+  let block = [pos1, pos2]
+  let content = emmet#util#getContent(block)
+  let content = join(map(split(content, mx . '\zs\s*'), 'trim(v:val)'), '')
+  call emmet#util#setContent(block, content)
+  if block[0][0] > 0
+    call setpos('.', [0, block[0][0], block[0][1], 0])
+  else
+    call setpos('.', curpos)
   endif
 endfunction
diff --git a/autoload/emmet/lang/jade.vim b/autoload/emmet/lang/jade.vim
index 6a59e87..f59f22d 100644
--- a/autoload/emmet/lang/jade.vim
+++ b/autoload/emmet/lang/jade.vim
@@ -329,3 +329,7 @@ function! emmet#lang#jade#removeTag() abort
     exe sn ',' (n-1) 'delete'
   endif
 endfunction
+
+function! emmet#lang#jade#mergeLines() abort
+  " nothing to do
+endfunction
diff --git a/autoload/emmet/lang/less.vim b/autoload/emmet/lang/less.vim
index 088f8c2..ae956c4 100644
--- a/autoload/emmet/lang/less.vim
+++ b/autoload/emmet/lang/less.vim
@@ -45,3 +45,7 @@ endfunction
 function! emmet#lang#less#removeTag() abort
   call emmet#lang#css#removeTag()
 endfunction
+
+function! emmet#lang#less#mergeLines() abort
+  call emmet#lang#css#mergeLines()
+endfunction
diff --git a/autoload/emmet/lang/sass.vim b/autoload/emmet/lang/sass.vim
index 49012cb..3d3fd58 100644
--- a/autoload/emmet/lang/sass.vim
+++ b/autoload/emmet/lang/sass.vim
@@ -158,3 +158,6 @@ endfunction
 
 function! emmet#lang#sass#removeTag() abort
 endfunction
+
+function! emmet#lang#sass#mergeLines() abort
+endfunction
diff --git a/autoload/emmet/lang/scss.vim b/autoload/emmet/lang/scss.vim
index ad2253d..ae35469 100644
--- a/autoload/emmet/lang/scss.vim
+++ b/autoload/emmet/lang/scss.vim
@@ -123,3 +123,7 @@ endfunction
 function! emmet#lang#scss#removeTag() abort
   call emmet#lang#css#removeTag()
 endfunction
+
+function! emmet#lang#scss#mergeLines() abort
+  call emmet#lang#css#mergeLines()
+endfunction
diff --git a/autoload/emmet/lang/slim.vim b/autoload/emmet/lang/slim.vim
index eb816a6..c583c1c 100644
--- a/autoload/emmet/lang/slim.vim
+++ b/autoload/emmet/lang/slim.vim
@@ -279,3 +279,6 @@ function! emmet#lang#slim#removeTag() abort
     exe sn ',' (n-1) 'delete'
   endif
 endfunction
+
+function! emmet#lang#slim#mergeLines() abort
+endfunction