19 javascript tutorial factory function in javascript

a factory function in javascript is a design pattern used to create objects. unlike constructors, which are invoked with the `new` keyword, factory functions simply return a new object. this approach allows for the creation of multiple instances of similar objects without the need for the `new` keyword, promoting cleaner and more readable code.

factory functions can encapsulate logic for object creation, allowing for customization through parameters. they can also maintain private state through closures, enhancing data encapsulation. this pattern is beneficial for creating complex objects with shared properties and methods while avoiding the complications of inheritance.

additionally, factory functions support the creation of various object types based on conditions, offering flexibility in object generation. they are commonly used in modular programming and can enhance code maintainability. overall, factory functions provide a powerful way to create objects in a more controlled and organized manner, making them a popular choice among javascript developers.
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