Node.js fs.Dir.close() Method

The fs.Dir.close() method is an inbuilt application programming interface of class fs.Dir with in File System module which is used to close the directory’s underlying resource handle asynchronously.

Syntax:

const dir.close()

Parameter: This method does not accept any parameter.
Return Value: This method returns the promise which is just an enhancement to callback functions stop().

Below programs illustrates the use of fs.Dir.close() method in Node.js

Example 1:

Filename: GFG.js

Javascript

// Node program to demonstrate the
// dir.close() method
const fs = require('fs');

// Initiating async function
async function stop(path) {

  // Creating and initiating directory's
  // underlying resource handle
  const dir = await fs.promises.opendir(path);

  // Asynchronously closing the directory's
  // underlying resource handle
  const promise = dir.close();

  // Display the result
  console.log(promise);
}

// Catching error
stop('./').catch(console.error);

Run GFG.js file using the following command: 

node GFG.js

Output:

Example 2:

Javascript

// Node program to demonstrate the
// dir.close() API
const fs = require('fs');

// Initiating async function
async function stop(path) {

  let dir = null;

  try {

  // Creating and initiating directory's
  // underlying resource handle
  dir = await fs.promises.
    opendir(new URL('file:///F:/java/'));

  } finally {

    if (dir) {

      // Display the result
      console.log("dir is closed successfully");

      // Close the file if it is opened.
      await dir.close();
    }
  }
}

// Catching error
stop('./').catch(console.error);

Run GFG.js file using the following command: 

node GFG.js

Output: 

Note: The above program will not run on online JavaScript and script editor.
Reference: https://nodejs.org/dist/latest-v12.x/docs/api/fs.html#fs_dir_close