function! ReadFile() abort
  let s:currentPos = col('.')
  let s:colNum = s:currentPos - 1
  let s:lastPos = len(getline('.'))
  let s:fileName = ''

  while s:colNum > -1
    if getline('.')[s:colNum] =~ "\['\"\]"
      break
    end
    let s:fileName =  getline('.')[s:colNum] . s:fileName
    let s:colNum = s:colNum - 1
  endwhile
  while s:currentPos < s:lastPos
    if getline('.')[s:currentPos] =~ "\['\"\]"
      break
    end
    let s:fileName =  s:fileName . getline('.')[s:currentPos]
    let s:currentPos = s:currentPos + 1
  endwhile
  let s:fullName = simplify(expand("%:h") . '/' . s:fileName)
  if !filereadable(s:fullName)
    if isdirectory(s:fullName)
      let s:fullName = s:fullName . '/index.js'
    else
      let s:fullName = s:fullName . '.js'
    endif
  endif
  execute ':sp ' . s:fullName
endfunction
nmap <C-g>  :call ReadFile()<CR>