What is encapsulation in JavaScript classes?

What is encapsulation in JavaScript classes?

Encapsulation is a fundamental concept in object-oriented programming that restricts access to certain components of an object. In JavaScript, this is often achieved using classes, where you can define private and public properties.

How do I create private properties in a JavaScript class?

You can create private properties in a JavaScript class using the # syntax. For example:

class MyClass {
    #privateProperty;
    constructor(value) {
        this.#privateProperty = value;
    }
}

Can you give me an example of using encapsulation?

Sure! Here's a simple example:

class BankAccount {
    #balance;
    constructor(initialBalance) {
        this.#balance = initialBalance;
    }
    deposit(amount) {
        this.#balance += amount;
    }
    getBalance() {
        return this.#balance;
    }
}

In this example, #balance is a private property.

What are the benefits of using encapsulation?

Encapsulation helps in protecting the internal state of an object, reduces complexity, and enhances code maintainability by exposing only necessary parts of the object.