问在Vim中，你最喜欢的HTML、Javascript和CSS的折叠方法(或秘密技术)是什么？

EN

" Default foldmethod
" Similar to fdm=indent, but lets blank and comment lines default high.
set fen fdm=expr fdi=
set foldexpr=EswaldFoldLevel(v:lnum)

function! EswaldFoldLevel(lnum)
  let ignored = '^\s*\([#/*]\|$\)'
  if getline(a:lnum) !~ ignored
    " In the general case, just use the indent level.
    " It would be nice if it didn't skip several levels...
    return indent(a:lnum) / &sw
  endif

  let previndent = 0
  let prevnum = a:lnum - 1
  while prevnum > 0
    if getline(prevnum) =~ ignored
      let prevnum = prevnum - 1
    else
      let previndent = indent(prevnum) / &sw
      break
    endif
  endwhile

  let nextindent = 0
  let maxline = line('$')
  let nextnum = a:lnum + 1
  while nextnum <= maxline
    if getline(nextnum) =~ ignored
      let nextnum = nextnum + 1
    else
      let nextindent = indent(nextnum) / &sw
      break
    endif
  endwhile

  return max([previndent, nextindent])
endfunction