Node.js fs.mkdirSync() Method

The fs.mkdirSync() method is an inbuilt application programming interface of fs module which provides an API for interacting with the file system in a manner closely modeled around standard POSIX functions.

fs.mkdirSync() Method

The fs.mkdirSync() method is used to create a directory Synchronously. If the directory already exists, an error is thrown unless the recursive option is set to true, which allows the creation of nested directories.

Syntax:

fs.mkdirSync( path, options )

Parameters:

This method accept two parameters as mentioned above and described below:

• path: The path at which directory is to be created. It can be string, buffer, etc.
• options: It is an optional parameter which determines how to create directory like recursively, etc.

Return value: It returns undefined. Below examples illustrate the use of fs.mkdirSync() method in Node.js

Example 1: This example demonstrates how to check for the existence of a directory and create it if it doesn't exist using Node.js fs.exists() and fs.mkdirSync() methods.

Output:

Checking for directory c:\Users\Suraj\node\Geeks
Not found!
The directory already exists

Example 2: This example checks for a directory's existence, creates it recursively if it doesn't exist, and verifies its creation using Node.js fs.exists() and fs.mkdirSync() methods

The above program will compile and run by using the below command.

node index.js

Output:

Checking for directory c:\Users\Suraj\node\Tisu
Not found!
The directory already exists

Summary

The fs.mkdirSync() method is a straightforward way to create directories synchronously in Node.js, especially useful when you need to ensure the existence of directories before proceeding with file operations.