How do I use prototypes with constructors in JavaScript?

Can you explain how to use prototypes with constructors in JavaScript?

Sure! In JavaScript, constructors are functions used to create objects. Prototypes allow you to add properties and methods to those objects.

How do I define a constructor function?

You can define a constructor function using the function keyword. For example:

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

And how do I add methods to the prototype?

You can add methods to the prototype like this:

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

Can you show me how to create an instance of the constructor?

Absolutely! You can create an instance using the new keyword:

const john = new Person('John', 30);
john.greet(); // Output: Hello, my name is John