What are some examples of pass by reference in JavaScript?

Can you explain what pass by reference means in JavaScript?

In JavaScript, pass by reference means that when you assign an object to a variable, you're actually assigning a reference to that object, not the object itself.

Can you give me an example of pass by reference?

Sure! If you have an object like let obj = { name: 'Alice' }; and you assign it to another variable like let newObj = obj;, both newObj and obj point to the same object. Changing newObj.name will also change obj.name.

What happens if I pass an object to a function?

When you pass an object to a function, you're passing a reference to that object. Any changes made to the object inside the function will affect the original object.

Can you show me a code snippet to illustrate this?

Absolutely! Here's a simple example:

function updateName(obj) {
    obj.name = 'Bob';
}

let person = { name: 'Alice' };
updateName(person);
console.log(person.name); // Outputs: Bob