Check If File Exists in Node.js

To check if a file exists in Node.js, you can use the fs.existsSync() method from the fs module.

This method takes the path to the file as its argument and returns a boolean indicating whether the file exists or not.

Here is an example of how you can use the fs.existsSync() method to check if a file exists:

const fs = require('fs');

// Check if the file exists
const fileExists = fs.existsSync('/path/to/file');

// Print the result
console.log(fileExists);
Code language: JavaScript (javascript)

If the file exists, the fileExists variable will be set to true. Otherwise, it will be set to false.

Asynchronous Method

An alternative method for checking if a file exists asynchronously in Node.js is to use the fs.stat() method.

This method works by attempting to retrieve the stats of the file asynchronously, and if it is successful, it means that the file exists. If the method returns an error, it means that the file does not exist.

Here is an example of how you can use the fs.stat() method to check if a file exists asynchronously:

function fileExists(path) {
  return new Promise((resolve, reject) => {
    fs.stat(path, (error, stats) => {
      if (error) {
        // The file does not exist, so reject the promise
        resolve(false);
      } else {
        // The file exists, so resolve the promise
        resolve(true);
      }
    });
  });
}
Code language: PHP (php)

To use this function, you would call it like this:

fileExists('/path/to/file')
  .then((exists) => {
    if (exists) {
      console.log('The file exists.');
    } else {
      console.log('The file does not exist.');
    }
  });
Code language: JavaScript (javascript)

Alternatively, you could use async/await to make the code look a little cleaner:

const exists = await fileExists('/path/to/file');

if (exists) {
  console.log('The file exists.');
} else {
  console.log('The file does not exist.');
}
Code language: JavaScript (javascript)