Node.js fs.unlink() Method

The fs.unlink() method is used to remove a file or symbolic link from the filesystem. This function does not work on directories, therefore it is recommended to use fs.rmdir() to remove a directory.
Syntax:

fs.unlink( path, callback )

Parameters: This method accepts two parameters as mentioned above and described below: 

• path: It is a string, Buffer or URL which represents the file or symbolic link which has to be removed.
• callback: It is a function that would be called when the method is executed. 
• err: It is an error that would be thrown if the method fails.

Below examples illustrate the fs.unlink() method in Node.js:
Example 1: This example removes a file from the filesystem.

javascript

// Node.js program to demonstrate the
// fs.unlink() method

// Import the filesystem module
const fs = require('fs');

// Get the files in current directory
// before deletion
getFilesInDirectory();

// Delete example_file.txt
fs.unlink("example_file.txt", (err => {
  if (err) console.log(err);
  else {
    console.log("\nDeleted file: example_file.txt");

    // Get the files in current directory
    // after deletion
    getFilesInDirectory();
  }
}));

// Function to get current filenames
// in directory with specific extension
function getFilesInDirectory() {
  console.log("\nFiles present in directory:");
  let files = fs.readdirSync(__dirname);
  files.forEach(file => {
    console.log(file);
  });
}

Output:

Files present in directory:
example_file.txt
index.js
package.json

Deleted file: example_file.txt

Files present in directory:
index.js
package.json

Example 2: This example removes a symbolic link from the filesystem.

javascript

// Node.js program to demonstrate the
// fs.unlink() method

// Import the filesystem module
const fs = require('fs');

// Creating symlink to file
fs.symlinkSync(__dirname + "\\example_file.txt", "symlinkToFile");
console.log("\nSymbolic link to example_file.txt created");

// Function to get current filenames
// in directory with specific extension
getFilesInDirectory();

// Deleting symbolic link to example_file.txt
// Delete example_file.txt
fs.unlink("symlinkToFile", (err => {
  if (err) console.log(err);
  else {
    console.log("\nDeleted Symbolic Link: symlinkToFile");

    // Get the files in current directory
    // after deletion
    getFilesInDirectory();
  }
}));

// Function to get current filenames
// in directory with specific extension
function getFilesInDirectory() {
  console.log("\nFiles present in directory:");
  let files = fs.readdirSync(__dirname);
  files.forEach(file => {
    console.log(file);
  });
}

Output:

Symbolic link to example_file.txt created

Files present in directory:
example_file.txt
index.js
package.json
symlinkToFile

Deleted Symbolic Link: symlinkToFile

Files present in directory:
example_file.txt
index.js
package.json

Reference: https://nodejs.org/api/fs.html#fs_fs_unlink_path_callback