Factory Pattern

With the factory pattern we can use factory functions in order to create new objects. A function is a factory function when it returns a new object without the use of the new keyword!

Say that we need many users for our application. We can create new users with a firstName, lastName, and email property. The factory function adds a fullName property to the newly created object as well, which returns the firstName and the lastName.

When to Use

• Use this when you need to create multiple objects that share the same properties
• This is helpful when object creation depends on a certain environment or configuration

When NOT to Use

• For simple objects where a plain object literal suffices — a factory adds unnecessary indirection
• When class constructors are the established convention in your project and the team expects new
• When there's no conditional logic or configuration driving object creation

Instructions