Require.vim

fun! Require(...)
  if !system("npm install " . join(a:000, " ") . " --save")
    let result = []
    for dep in a:000
      call add(result, substitute("var x = require('x');\n", "x", dep, "g"))
    endfor
    put = join(result, '')
  endif
endfunction
command! -nargs=* RQ call Require(<f-args>)

usage:
:RQ dep1 dep2 dep3

this will install and save any number of dependencies you specify using npm and the will write out a block of require statements for those dependencies. So it's like a super snippet