What are some examples of encapsulation in JavaScript?

What are some examples of encapsulation in JavaScript?

Encapsulation in JavaScript is a fundamental concept in OOP. It involves bundling data and methods that operate on that data within a single unit, often a class. For example, using closures or the module pattern can help achieve encapsulation.

Can you give me a specific code example?

Sure! Here's a simple example using a class:

class Person {
    constructor(name, age) {
        let _name = name; // private variable
        let _age = age;  // private variable

        this.getName = function() { return _name; };
        this.getAge = function() { return _age; };
        this.setName = function(name) { _name = name; };
        this.setAge = function(age) { _age = age; };
    }
}

const person = new Person('Alice', 30);
console.log(person.getName()); // Alice
console.log(person.getAge());  // 30

What are the benefits of using encapsulation?

Encapsulation helps in data hiding, reduces complexity, and increases code maintainability. It allows you to change the internal implementation without affecting the external code that uses the class.

Are there other ways to achieve encapsulation in JavaScript?

Yes, besides classes, you can use IIFE (Immediately Invoked Function Expressions) and the module pattern to create private variables and methods, effectively achieving encapsulation.