Why Generic factory pattern in Typescript? - Purpose & Use Cases

The Big Idea

What if you could build any object with just one simple tool, no matter how many types you need?

The Scenario

Imagine you need to create many different types of objects in your program, like cars, bikes, and trucks. You write separate code for each type, repeating similar steps over and over.

The Problem

This manual way is slow and boring. If you want to add a new type, you must write new code from scratch. It's easy to make mistakes and hard to keep track of all the different creation steps.

The Solution

The generic factory pattern lets you write one smart piece of code that can create any type of object you want. You just tell it what type to make, and it handles the rest. This saves time and keeps your code clean and easy to change.

Before vs After

✗ Before

function createCar() { return new Car(); }
function createBike() { return new Bike(); }

✓ After

function create<T>(type: { new(): T }): T { return new type(); }

What It Enables

It makes your code flexible and ready to build many kinds of objects without rewriting creation logic each time.

Real Life Example

Think of a toy factory that can switch between making dolls, cars, or robots just by changing a setting, instead of building a new machine for each toy.

Key Takeaways

Manual object creation repeats code and wastes time.

Generic factory pattern creates any object type with one flexible function.

This approach makes adding new types easy and your code cleaner.