https://grokonez.com/design-pattern/implement-simple-factory-method-pattern-node-js-example
How to implement simple Factory Pattern in Node.js
Instead of using class constructors or new
keyword to create an object of a class, we can abstract this process. So, we can determine the type of object at run-time, by the time of generating that class object. The implementation seems like Factory Method, but simpler than Factory Method. This simple Factory is not treated as a standard GoF design pattern, but the approach is common to any place where we want to separate the code that varies a lot from the code that does not vary.
In this tutorial, grokonez shows you how to do it in NodeJs.
"Audi"
or "BMW"
or "Mercedes"
.
CarFactory
is the Factory class. In the client, we won’t use new
keyword but create()
method to create a new car:
const BMW = CarFactory.create('BMW');
Car
class is a parent class for Audi
, BMW
, Mercedes
class that we're gonna create in the next steps.
default_car.js
class Car {
constructor(name) {
this.name = name + '-' + Math.random().toString(36).substring(2, 15);
}
showInfo() {
console.log(`I'm ${this.name}`)
}
}
module.exports = Car;
This class has constructor method that assign a generated id to the car’s name and a showInfo()
method to show the name
field.
Audi
, BMW
, Mercedes
that extends default Car
class above.
More at:
https://grokonez.com/design-pattern/implement-simple-factory-method-pattern-node-js-example
How to implement simple Factory Pattern in Node.js
#nodejs #factory #pattern