Node js check if path is file or directory

Question

I can t seem to get any search results that explain how to do this   All I want to do is be able to know if a given path is a file or a directory  folder

User · Answer

Here s a function that I use  Nobody is making use of promisify and await async feature in this post so I thought I would share   const promisify   require  util   promisify  const lstat   promisify require  fs   lstat    async function isDirectory  path      try       return  await lstat path   isDirectory          catch  e        return false          Note   I don t use require  fs   promises  because it has been experimental for one year now  better not rely on it

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The answers above check if a filesystem contains a path that is a file or directory  But it doesn t identify if a given path alone is a file or directory      The answer is to identify directory-based paths using      like --    c dos run     lt -- trailing period    Like a path of a directory or file that has not been written yet  Or a path from a different computer  Or a path where both a file and directory of the same name exists       tmp      - dozen path     - dozen path          - eggs txt         tmp dozen path        tmp dozen path         Very few fs allow this  But still  Don t trust the filesystem alone      Converts the non-standard  path-ends-in-slash  to the standard  path-is-identified-by current     or previous      directory symbol  function tryGetPath pathItem        const isPosix   pathItem includes           if   isPosix  amp  amp  pathItem endsWith                    isPosix  amp  amp  pathItem endsWith                   pathItem   pathItem                  return pathItem       If a path ends with a current directory identifier  it is a path   c dos run   and c  dos run   function isDirectory pathItem        const isPosix   pathItem includes           if  pathItem            pathItem   -                 pathItem    isPosix                   pathItem            return  isPosix   pathItem endsWith          pathItem endsWith          pathItem endsWith           pathItem endsWith                 If a path is not a directory  and it isn t empty  it must be a file function isFile pathItem        if  pathItem                   return false            return  isDirectory pathItem       Node version  v11 10 0 - Feb 2019     Last thought  Why even hit the filesystem

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The following should tell you   From the docs  fs lstatSync path string  isDirectory      Objects returned from fs stat   and fs lstat   are of this type  stats isFile   stats isDirectory   stats isBlockDevice   stats isCharacterDevice   stats isSymbolicLink    only valid with fs lstat    stats isFIFO   stats isSocket     NOTE  The above solution will throw an Error if  for ex  the file or directory doesn t exist  If you want a true or false approach  try fs existsSync dirPath   amp  amp  fs lstatSync dirPath  isDirectory    as mentioned by Joseph in the comments below

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Update  Node Js    10  We can use the new fs promises API  const fs   require  fs   promises    async     gt        const stat   await fs lstat  test txt        console log stat isFile          catch console error      Any Node Js version  Here s how you would detect if a path is a file or a directory asynchronously  which is the recommended approach in node   using fs lstat  const fs   require  fs     let path     path to something    fs lstat path   err  stats    gt         if err          return console log err     Handle error      console log  Is file    stats isFile           console log  Is directory    stats isDirectory           console log  Is symbolic link    stats isSymbolicLink           console log  Is FIFO    stats isFIFO           console log  Is socket    stats isSocket           console log  Is character device    stats isCharacterDevice           console log  Is block device    stats isBlockDevice               Note when using the synchronous API      When using the synchronous form any exceptions are immediately thrown    You can use try catch to handle exceptions or allow them to bubble up    try       fs lstatSync   some path   isDirectory    catch e         Handle error    if e code     ENOENT           no such file or directory        do something     else          do something else

User · Answer

Seriously  question exists five years and no nice facade   function is dir path        try           var stat   fs lstatSync path           return stat isDirectory          catch  e               lstatSync throws an error if path doesn t exist         return false

User · Answer

Depending on your needs  you can probably rely on node s path module   You may not be able to hit the filesystem  e g  the file hasn t been created yet  and tbh you probably want to avoid hitting the filesystem unless you really need the extra validation  If you can make the assumption that what you are checking for follows   lt extname gt  format  just look at the name    Obviously if you are looking for a file without an extname you will need to hit the filesystem to be sure  But keep it simple until you need more complicated   const path   require  path     function isFile pathItem      return   path extname pathItem

[node.js] Node.js check if path is file or directory

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