What are references in JavaScript?

What are references in JavaScript?

In JavaScript, references are pointers to objects in memory. When you assign an object to a variable, you're actually assigning a reference to that object.

Can you explain how references differ from primitive values?

Sure! Primitive values (like numbers and strings) are stored directly in the variable, while objects are stored as references. This means that if you copy an object variable, both variables point to the same object.

What happens if I modify an object through one reference?

If you modify an object through one reference, the change will be reflected in all references to that object since they all point to the same memory location.

Can you give an example of this?

Absolutely! If you have let obj1 = { name: 'Alice' }; let obj2 = obj1; obj2.name = 'Bob';, then obj1.name will also be 'Bob' because both variables reference the same object.