JavaScript: Get the extension of a filename

JavaScript Basic: Exercise-14 with Solution

Write a JavaScript exercise to get the filename extension.

Visual Presentation:

Sample Solution:

JavaScript Code:

// Assign the string "system.php" to the variable filename
filename = "system.php";

// Log the result of extracting the file extension using split and pop to the console
console.log(filename.split('.').pop());

// Reassign the variable filename to the string "abc.js"
filename = "abc.js";

// Log the result of extracting the file extension using split and pop to the console
console.log(filename.split('.').pop()); 

Output:

php
js

Live Demo:

See the Pen JavaScript: Extension of a filename - basic-ex-14 by w3resource (@w3resource) on CodePen.

ES6 Version:

// Using ES6 const to declare the variable filename and log the file extension
let filename = "system.php";
console.log(filename.split('.').pop());

// Reassign the variable filename and log the file extension for the new value
filename = "abc.js";
console.log(filename.split('.').pop());

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