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A Quick Guide to JavaScript Design Patterns

  • POSTED ON
  • January 17, 2023
  • POSTED BY
  • Muhammad Ahmad
  • POSTED ON January 17, 2023
  • POSTED BY Muhammad Ahmad

JavaScript is undoubtedly a language that has made wonders work. The giants like Google, YouTube, Wikipedia, Facebook, and Yahoo have used JavaScript both in their front-end and back-end development and who else can doubt their success? Of course, no one. Thanks to JavaScript design patterns that have made the world go crazy.

In this article, we will elaborate on the JavaScript design patterns that are implemented at vteams. The design patterns are basically used to identify reusable solutions to the problems faced during the software development cycle.

History of Design Patterns

In the programming world, the concept of design patterns isn’t old. However, it was formulated back in 1994 for the first time and that too, when an influential book “Design Patterns: Elements Of Reusable Object-Oriented Software” was published. 

Interestingly, in this book, almost 23 object-oriented design patterns were mentioned:

A Quick Guide to JavaScript Design Patterns 1

The authors who produced this exceptional work are named as follows: 

Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides – a group that became popular later with the title Gang of Four (GoF).

Furthermore, to understand Javascript patterns vividly, it is imperative to have a glance at the basic definition of design patterns. 

Design Patterns and their Structure

Design patterns in JavaScript are pre-built blueprints that aid in solving specific problems. If you must know it is more like a description or template and doesn’t act like a finished piece of code. 

Henceforth, notably, when you implement the same pattern to the two codes directing to two different scenarios, it reverses back to two different results.
Regardless of this fact, one more situation is often faced and that is at the time of discovering the design pattern. So, JavaScript developers, just take a chill pill as we are bursting the bubble in the coming lines (the quick way to discover patterns in JS).

It’s simple! Whenever the same solution is repeated over and over again, you will recognize it eventually and name it by further describing the solution.

Note: Most often, design patterns are muddled up with algorithms. 

Design Patterns Structures

Since we are moving towards Javascript design patterns, we may need to comprehend design patterns structure first. 

Practically, the documentation template structure contains the following parts:

Intent – it briefs about the functionality of the pattern; including the problem and solution.

Motivation – the detailed overview of how the pattern will solve the problem by providing resourceful solutions.
Structure – It makes visual understanding of the pattern super feasible by showing certain classes and objects.
Code – the example code of any programming language is quoted so a reader can grasp the idea instantly. 

What are JavaScript Design Patterns?

Design patterns in JavaScript are no more different but with a few amendments. For instance, the features that can bring essential changes are worth mentioning. Such as: 

Flexibility with programming styles – This is one of the patterns in JS that supports object-oriented, procedural, and functional programming styles. 

Enables first-class functions – Functions (act like a variable) and are passed on as arguments expediently. 

Prototype-based inheritance – JavaScript design patterns work on prototype-based inheritance or instance-based inheritance instead of class-based inheritance. 

These are a few Javascript patterns that have turned the tables for professional Javascript developers by infusing soul into the software they deployed.

Categories of JavaScript design patterns

A Quick Guide to JavaScript Design Patterns 2

The design patterns in JavaScript are divided into three groups:

  1. Creational design pattern

In order to handle the object creation mechanism, these patterns are utilized. Gingerly, an object creation approach in a code set can lead to more complexity. Creational JavaScript patterns resolve this problem by controlling the creational process. 

Some of the design patterns in JS, that fall under this category are Factory, Prototype, Constructor, and Singleton. 

  1. Structural design pattern

For these patterns in JS, the concerned part is object composition. The facile ways are explained through these design patterns in order to organize classes and objects into giant structures.

They ensure that the system and its structure perform efficiently and flexibly while a certain part of the system is changed; it doesn’t affect the entire structure of the system though. 

Structural Javascript design patterns consist of some more patterns like Decorator, Adapter, Module, Proxy, Facade, etc. 

  1. Behavioral design pattern 

As the name suggests, these design patterns in Javascript primarily deal with dissimilar objects in the system. The behavioral design patterns in JS improve the communication between those objects. 

The patterns that are part of this category are Command, Observer, Template, Strategy, Iterator, and Chain of Responsibility.

Final Thoughts

Javascript design patterns are indeed a way to bring incredible innovations to the whole software development process and performance. Thus, all that vteams developers do is employ these design patterns in the creation process. 

We suggest all other developers use these JS design patterns in their development strategies.

ABOUT THE AUTHOR

Muhammad Ahmad

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