Difference Between Function Overloading and Function Overriding in JavaScript Last Updated : 02 Jul, 2024 Summarize Comments Improve Suggest changes Share Like Article Like Report Function overloading and function overriding are two important concepts in object-oriented programming (OOP). Function overloading allows the creation of multiple functions with the same name but different parameters. Function overriding allows the subclass or child class to provide the specific implementation of the method that is already defined in its superclass or parent class.These are the following topics that we are going to discuss:Table of ContentWhat is Function Overloading?What is Function Overriding?Difference Between Function Overloading and Function Overriding in JavaScriptWhat is Function Overloading?Function overloading is the ability to create multiple functions with the same name but different parameters. However, JavaScript does not natively support function overloading as seen in languages like C++ or Java. Instead, we can achieve a similar effect using the workarounds such as the checking the number and types of the arguments within the single function definition.Example: In the below example, the display function behave differently based on type of its argument. JavaScript function display(value) { if (typeof value === 'number') { console.log("Number: " + value); } else if (typeof value === 'string') { console.log("String: " + value); } } display(32); display("Hello"); OutputNumber: 32 String: Hello What is Function Overriding?The Function overriding occurs when a subclass or child class provides the specific implementation for the method that is already defined in its superclass or parent class. This allows a subclass to the tailor the method to its own needs. Function overriding in JavaScript allows a subclass or child class to provide a specific implementation of a method that is already defined in its superclass or parent class. This enables the child class to show the behavior of the inherited method that can be manipulated by the child class itself. Example: The Child class overrides the display method of the Parent class. When the display method is called on the instance of Child and overridden method in the Child class is executed. JavaScript class Parent { display() { console.log("Display method from Parent class"); } } class Child extends Parent { display() { console.log("Display method from Child class"); } } let obj = new Child(); obj.display(); OutputDisplay method from Child class Difference Between Function Overloading and Function Overriding in JavaScriptCharacteristicsFunction OverloadingFunction OverridingDefinition The Multiple functions with the same name but different parameters. The Subclass provides the specific implementation of a method already defined in its superclass.Native Support Not natively supported in JavaScript achieved through workarounds. The Natively supported using the class inheritance.Purpose To allow functions to the handle different types or numbers of the parameters. To allow a subclass to provide the specific implementation for the method.Example Usage Handling the different argument types within the same function. The Customizing or extending the behavior of the method in a subclass.Code Complexity Can increase complexity due to the manual checks of parameters. The more straightforward aligns with the OOP principles. Comment More infoAdvertise with us Next Article Difference Between Function Overloading and Function Overriding in JavaScript S subramanyasmgm Follow Improve Article Tags : Difference Between JavaScript Web Technologies Similar Reads JavaScript Tutorial JavaScript is a programming language used to create dynamic content for websites. It is a lightweight, cross-platform, and single-threaded programming language. It's an interpreted language that executes code line by line, providing more flexibility.JavaScript on Client Side: On the client side, Jav 11 min read Web Development Web development is the process of creating, building, and maintaining websites and web applications. It involves everything from web design to programming and database management. Web development is generally divided into three core areas: Frontend Development, Backend Development, and Full Stack De 5 min read React Interview Questions and Answers React is an efficient, flexible, and open-source JavaScript library that allows developers to create simple, fast, and scalable web applications. Jordan Walke, a software engineer who was working for Facebook, created React. Developers with a JavaScript background can easily develop web applications 15+ min read React Tutorial React is a powerful JavaScript library for building fast, scalable front-end applications. Created by Facebook, it's known for its component-based structure, single-page applications (SPAs), and virtual DOM,enabling efficient UI updates and a seamless user experience.Note: The latest stable version 7 min read JavaScript Interview Questions and Answers JavaScript is the most used programming language for developing websites, web servers, mobile applications, and many other platforms. In Both Front-end and Back-end Interviews, JavaScript was asked, and its difficulty depends upon the on your profile and company. Here, we compiled 70+ JS Interview q 15+ min read Difference Between IPv4 and IPv6 IPv4 and IPv6 are two versions of the system that gives devices a unique address on the internet, known as the Internet Protocol (IP). IP is like a set of rules that helps devices send and receive data online. Since the internet is made up of billions of connected devices, each one needs its own spe 7 min read Domain Name System (DNS) DNS is a hierarchical and distributed naming system that translates domain names into IP addresses. When you type a domain name like www.geeksforgeeks.org into your browser, DNS ensures that the request reaches the correct server by resolving the domain to its corresponding IP address.Without DNS, w 8 min read HTML Interview Questions and Answers HTML (HyperText Markup Language) is the foundational language for creating web pages and web applications. Whether you're a fresher or an experienced professional, preparing for an HTML interview requires a solid understanding of both basic and advanced concepts. Below is a curated list of 50+ HTML 14 min read NodeJS Interview Questions and Answers NodeJS is one of the most popular runtime environments, known for its efficiency, scalability, and ability to handle asynchronous operations. It is built on Chromeâs V8 JavaScript engine for executing JavaScript code outside of a browser. It is extensively used by top companies such as LinkedIn, Net 15+ min read Differences between TCP and UDP Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) both are protocols of the Transport Layer Protocols. TCP is a connection-oriented protocol whereas UDP is a part of the Internet Protocol suite, referred to as the UDP/IP suite. Unlike TCP, it is an unreliable and connectionless pr 9 min read Like