Learn JavaScript Design Patterns to Simplify Your Development

What are Design Patterns?

Design patterns are proven, reusable solutions to common software design problems, helping write more maintainable and scalable JavaScript code.

Common JavaScript Design Patterns

• Module Pattern — encapsulates private variables and exposes only a public API.
• Singleton Pattern — ensures a class has only one instance and provides a global access point to it.
• Observer Pattern — allows objects to subscribe to and react to events from another object.
• Factory Pattern — creates objects without specifying the exact class of object to create.
• Constructor Pattern — uses functions with new to create multiple similar objects.

// Module Pattern example
const Counter = (function() {
    let count = 0;
    return {
        increment: () => ++count,
        getCount: () => count
    };
})();

Counter.increment();
console.log(Counter.getCount()); // 1