What are reference types in JavaScript?

What are reference types in JavaScript?

In JavaScript, reference types are data types that store references to the actual data rather than the data itself. Examples include objects, arrays, and functions.

Can you explain how objects work as reference types?

Sure! Objects in JavaScript are collections of key-value pairs. When you assign an object to a variable, you're actually assigning a reference to that object, not the object itself.

What happens if I copy an object to another variable?

If you copy an object to another variable, both variables will reference the same object. Changes made through one variable will affect the other.

How do I create a copy of an object?

You can create a shallow copy of an object using methods like Object.assign() or the spread operator (...). For deep copies, you might use JSON methods or libraries like Lodash.