Understanding Prototype-based Encapsulation in JavaScript

Dive Deep into Encapsulation Using Prototypes for Cleaner and More Maintainable Code

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In JavaScript, prototype-based encapsulation is a powerful technique for organizing and protecting data within objects.

In this guide, we’ll explore how prototype-based encapsulation works, why it’s important, and provide practical examples to help you implement it effectively in your codebase.

What is Prototype-based Encapsulation?

Prototype-based encapsulation is a concept in JavaScript where objects encapsulate their properties and methods within their prototypes. This encapsulation allows for better organization of code, prevents unintended access to data, and promotes code reusability.

Understanding Encapsulation with Prototypes

Let’s start by understanding encapsulation through a simple example:

function Person(name, age) {
  this.name = name;
  this.age = age;
}

Person.prototype.getDetails = function() {
  return `Name: ${this.name}, Age: ${this.age}`;
};

const john = new Person('John', 30);
console.log(john.getDetails()); // Output: Name: John, Age: 30