What is class encapsulation in JavaScript?

What is class encapsulation in JavaScript?

Class encapsulation in JavaScript is a principle that restricts access to certain components of a class, allowing only specific methods to interact with them.

Can you give me an example of encapsulation in a JavaScript class?

Sure! Here's a simple example:

class Person {
    constructor(name, age) {
        this.name = name;
        this._age = age; // private property
    }

    getAge() {
        return this._age;
    }

    setAge(newAge) {
        if (newAge > 0) {
            this._age = newAge;
        }
    }
}

In this example, _age is a private property, and you can only access it through the getAge and setAge methods.

Why is encapsulation important in programming?

Encapsulation is important because it helps to protect the internal state of an object, reduces complexity, and increases code maintainability by exposing only necessary parts of the class.

Are there any drawbacks to using encapsulation?

Yes, while encapsulation improves security and maintainability, it can also lead to increased complexity and may require more boilerplate code to manage accessors and mutators.