How do I use call and apply in JavaScript?

How do I use call and apply in JavaScript?

The call and apply methods are used to invoke functions with a specific this context. Would you like an example?

Yes, please provide an example of both.

Sure! Here's an example using call:

function greet() {
  console.log(`Hello, ${this.name}`);
}

const user = { name: 'Alice' };

greet.call(user); // Output: Hello, Alice

And for apply:

function introduce(age) {
  console.log(`I am ${this.name} and I am ${age} years old.`);
}

introduce.apply(user, [30]); // Output: I am Alice and I am 30 years old.

What are the main differences between call and apply?

The main difference is how arguments are passed. call takes arguments individually, while apply takes an array of arguments.

Can you give me a real-world scenario where I might use these methods?

Absolutely! You might use call or apply when you want to borrow methods from one object and use them in another context, like using array methods on array-like objects.