Node.js fs.filehandle.chmod() Method

The fs.filehandle.chmod() method is an inbuilt application programming interface of class fs.filehandle within File System module which is used to change the permission of the particular file.

Syntax: 

const filehandle.chmod( mode )

Parameter: This method accepts single parameter mode that holds the integer value.
Return Value: This method returns a pending promise which contain no value in it.

Below programs illustrates the use of fs.filehandle.chmod() method.

Example 1: Filename: index.js  

Directory structure before running the program: 

👁 Image

Directory structure after running the program: 

👁 Image

Run index.js file using the following command: 

node index.js

Output: 

content of file before operation :- Content of example.txt file 
permission is changed to read only 
content of file after operation :- Content of example.txt file 
 

Example 2: Filename: index.js  

Directory structure before running the program: 

👁 Image

Directory structure after running the program: 
 

👁 Image

Run index.js file using the following command: 

node index.js

Output: 

content of file before operation :- This is a file containing a collection of books. 
permission is changed to read only 
content of file after operation :- This is a file containing a collection of books. 
 

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