Node.js fs.Dir.closeSync() Method

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

Syntax:

const dir.closeSync()

Parameter: This method does not accept any parameter.

Return Value: This method returns an undefined object

Below programs illustrates the use of fs.Dir.closeSync() method.



Example 1:
Filename: index.js

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// Node.js program to demonstrate the 
// dir.closeSync() method
const fs = require('fs');
   
// Initiating asyn function
async function stop(path) {
   
  // Creating and initiating directory's 
  // underlying resource handle
  const dir = await fs.promises.opendir(path);
  
  console.log("All the dirent beofre operation :- ");
  for (var i = 0; i <= 6; i++) {
     console.log(((dir.readSync())).name);
  }
     
  // Synchronously closeSyncing the directory's
  // underlying resource handle
  const promise = dir.closeSync();
  
  // Display the result
  console.log("dir is closed successfully");
}
   
// Catching error
stop('./').catch(console.error);

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Run index.js file using the following command:

node index.js

Output:

All the dirent beofre operation :-
abcd.cer
books.txt
cert.cer
certfile.cer
certificate1.cer
example.txt
features
dir is closed successfully

Example 2:
Filename: index.js

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// Node.js program to demonstrate the 
// dir.closeSync() method
const fs = require('fs');
const fsPromises = fs.promises;
  
// Name of the directory to be created
let directo = './temp';
  
// Checking if the directory is present or not
if (!fs.existsSync(directo)){
  fs.mkdirSync(directo);
}
     
// Initiating asynchronous function
async function funct(path) {
       
  // Initializng dir
  let dir = null;
  let pathval = null;
     
  try {
      
   // Creating and initiating directory's
   // underlying resource handle
   dir = await fs.promises.opendir(
      new URL('file:///F:/java/temp'));
  
   console.log("All the dirent before operation :- "
                 + ((dir.readSync())));
     
   // Getting the path of the directory
   // by using path() method
   pathval = dir.path;
     
  } finally {
     
    if (dir) {
   
      // Close the file if it is opened.
      console.log("Path :- " + pathval);
  
      console.log("All the dirent beofre operation :- "
                          + ((dir.readSync())));
  
      console.log("dir is closed successfully");
   
      await dir.closeSync();   
    }
  }
}
     
funct('./').catch(console.error);

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Run index.js file using the following command:

node index.js

Output:

All the dirent before operation :- [object Object]
Path :- F:
All the dirent before operation :- [object Object]
dir is closed successfully

Reference: https://nodejs.org/dist/latest-v12.x/docs/api/fs.html#fs_dir_closesync




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