When should I use prototypes in JavaScript?

When should I use prototypes in JavaScript?

You should use prototypes when you want to create shared properties or methods for multiple objects, improving memory efficiency.

Can you give me an example of using prototypes?

Sure! You can define a constructor function and add methods to its prototype, like this:

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

Person.prototype.greet = function() {
    console.log(`Hello, my name is ${this.name}`);
};

const alice = new Person('Alice');
alice.greet(); // Hello, my name is Alice

What are the advantages of using prototypes?

Using prototypes allows for memory efficiency since methods are shared across instances, reducing redundancy.

Are there any downsides to using prototypes?

Yes, one downside is that it can lead to confusion if not properly understood, especially for those new to JavaScript.