Javascript — JavaScript Design Patterns

Design patterns provide reusable solutions to common coding problems. Familiar patterns in JavaScript include Module, Singleton, Factory, Observer, and Prototype. Understanding these helps create modular, maintainable, and scalable code.

// Singleton pattern example
const Singleton = (function() {
  let instance;
  function createInstance() {
    return { name: 'SingletonInstance' };
  }
  return {
    getInstance: function() {
      if (!instance) instance = createInstance();
      return instance;
    }
  };
})();