design-patterns-typescript

This npm package is developed for support the design patterns in typescript. We can use these design patterns in our frontend web development.

Installation

Install design-patterns-typescript with npm

  npm i design-patterns-typescript

Badges

Add badges from somewhere like: shields.io

Usage/Examples

Using Flyweight design pattern

import {FlyweightFactory} from 'design-patterns-typescript'

const factory = new FlyweightFactory([
    ['Chevrolet', 'Camaro2018', 'pink'],
    ['Mercedes Benz', 'C300', 'black'],
    ['Mercedes Benz', 'C500', 'red'],
    ['BMW', 'M5', 'red'],
    ['BMW', 'X6', 'white'],
    
]);

factory.listFlyweights();



function addCarToPoliceDatabase(
    ff: FlyweightFactory, plates: string, owner: string,
    brand: string, model: string, color: string,
) {
    console.log('\nClient: Adding a car to database.');
    const flyweight = ff.getFlyweight([brand, model, color]);

    
    flyweight.operation([plates, owner]);
}

addCarToPoliceDatabase(factory, 'CL234IR', 'James Doe', 'BMW', 'M5', 'red');

addCarToPoliceDatabase(factory, 'CL234IR', 'James Doe', 'BMW', 'X1', 'red');

factory.listFlyweights();

Features

These Structural design patterns are implemented and you can just import them and use.

• Adapter

  Allows objects with incompatible interfaces to collaborate.

• Composite

  Lets you compose objects into tree structures and then work with these structures as if they were individual objects.

• Decorator

  Lets you attach new behaviors to objects by placing these objects inside special wrapper objects that contain the behaviors.

• Flyweight

  Lets you fit more objects into the available amount of RAM by sharing common parts of state between multiple objects instead of keeping all of the data in each object.

• Proxy

  Lets you provide a substitute or placeholder for another object. A proxy controls access to the original object, allowing you to perform something either before or after the request gets through to the original object.

These Creational design patterns are implemented and you can just import them and use.

• Prototype

  Lets you copy existing objects without making your code dependent on their classes.

Contributing

Contributions are always welcome!

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License

MIT

Keywords

design-patterns typescript react node