Skip to content

How to check if a file exists in Node.js

New Course Coming Soon:

Get Really Good at Git

How to check if a file exists in the filesystem using Node.js, using the `fs` module

The way to check if a file exists in the filesystem, using Node.js, is by using the fs.existsSync() method:

const fs = require('fs')

const path = './file.txt'

try {
  if (fs.existsSync(path)) {
    //file exists
  }
} catch(err) {
  console.error(err)
}

This method is synchronous. This means that it’s blocking. To check if a file exists in an asynchronous way, you can use fs.access(), which checks the existence of a file without opening it:

const fs = require('fs')

const path = './file.txt'

fs.access(path, fs.F_OK, (err) => {
  if (err) {
    console.error(err)
    return
  }

  //file exists
})
Are you intimidated by Git? Can’t figure out merge vs rebase? Are you afraid of screwing up something any time you have to do something in Git? Do you rely on ChatGPT or random people’s answer on StackOverflow to fix your problems? Your coworkers are tired of explaining Git to you all the time? Git is something we all need to use, but few of us really master it. I created this course to improve your Git (and GitHub) knowledge at a radical level. A course that helps you feel less frustrated with Git. Launching May 21, 2024. Join the waiting list!
→ Get my Node.js Handbook
→ Read my Node.js Tutorial on The Valley of Code

Here is how can I help you: