How do I create private properties in JavaScript classes?

How do I create private properties in JavaScript classes?

In JavaScript, you can create private properties using the # syntax. For example, #myPrivateProperty.

Can you show me an example of a class with private properties?

Sure! Here's a simple example:

class MyClass {
    #privateProperty;

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

    getPrivateProperty() {
        return this.#privateProperty;
    }
}

const myInstance = new MyClass('Hello');
console.log(myInstance.getPrivateProperty()); // Outputs: Hello

What happens if I try to access a private property directly?

If you try to access a private property directly, you'll get a syntax error. For example, myInstance.#privateProperty will not work.

Are there any alternatives to using the # syntax?

Yes, you can use closures or WeakMaps to create private properties, but the # syntax is the most straightforward in modern JavaScript.