> Articles > Factory Function In JavaScript

Factory Function In JavaScript

A function factory in JavaScript is used to create function objects.

What is Factory Function?

We can have a function works as a factory which creates and returns function. We can return different functions based on parameter of function. As we have a function inside another function so closure is created and inner function will have access to factory function parameter even after it returns. This provides great flexibility for creation of functions. Let's see the implementation of factory function in JavaScript.

Implementation

functionfactory.js

Factory Function JavaScript - Example Source Code

Output

Factory Function JavaScript - Example Output


Suresh Kumar Srivastava is founder of online learning site coursegalaxy.com and author of popular books "C In Depth", "Data Structures Through C In Depth". He has 18+ years experience in industry and worked on architecture and design of multiple products. This article is from his course on Advanced JavaScript.