Understanding JavaScript Design Patterns

Design patterns are reusable solutions to common programming problems. They help write clean, maintainable, and efficient code.

Common Patterns in JavaScript

Module Pattern

Encapsulates related code into a single unit with private and public members.

Example:‍

const Counter = (function() {
  let count = 0; // private variable

  return {
    increment: function() {
      count++;
      return count;
    },
    reset: function() {
      count = 0;
    }
  };
})();

console.log(Counter.increment()); // 1
console.log(Counter.increment()); // 2
Counter.reset();
console.log(Counter.increment()); // 1

‍Singleton Pattern

Ensures a class has only one instance and provides a global point of access.

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