Node.js path.basename() Method

The path.basename() method is used to get the filename portion of a path to the file. The trailing directory separators are ignored when using this method. Syntax:

path.basename( path, extension )

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

• path: It is the file path that would be used to extract the filename.
• extension: It is an optional file extension that would be removed from the returned string.

Return Value: It returns a string with the filename portion of the path. It throws an error if the path or the extension parameters are not string values. Below programs illustrate the path.basename() method in node.js: Example 1: Using UNIX file paths javascript

// Node.js program to demonstrate the   
// path.basename() method

// Import the path module
const path = require('path');

path1 = path.basename('/home/user/bash/index.txt');
console.log(path1)

// Using the extension parameter
path2 = path.basename('/home/user/bash/index.txt', '.txt');
console.log(path2)

Output:

index.txt
index

Example 2: Using Windows file paths javascript

// Node.js program to demonstrate the   
// path.basename() method

// Import the path module
const path = require('path');

path1 = path.basename('C:\\users\\bash\\index.html');
console.log(path1)

// Using the extension parameter
path2 = path.basename('C:\\users\\bash\\index.html', '.html');
console.log(path2)

Output:

index.html
index

Reference: https://nodejs.org/docs/latest-v11.x/api/path.html#path_path_basename_path_ext