5 Must-Know Design Patterns for Javascript Developers

5 Must-Know Design Patterns for Javascript Developers

What is a Design Pattern?

Design patterns are proven, battle-tested solutions to common problems developers face daily. They provide structured approaches for designing software systems, promoting best practices that lead to maintainable, secure, and scalable code. By applying these patterns, engineers can create systems that are not only functional but also flexible for future changes.

🔥 Five Popular Design Patterns in Javascript

Here are five design patterns commonly used in Javascript development that I like:

1. Singleton Pattern

The Singleton pattern ensures a class has only one instance and provides a global point of access to it. In Javascript, modules are cached and shared across the application, making it easy to implement this pattern without extra effort.

For example, when managing connections to third-party services like databases or caching systems, using a Singleton pattern prevents duplicate connections:

class DBConnection {
  constructor() {
    this.connection = null;
  }

  static getInstance() {
    if (!DBConnection.instance) {
      DBConnection.instance = new DBConnection();
    }
    return DBConnection.instance;
  }…