What are spread parameters in JavaScript?

Can you explain what spread parameters are in JavaScript?

Sure! Spread parameters allow you to expand an iterable (like an array) into individual elements. They are used in function arguments and array literals.

How do I use spread parameters in a function?

You can use them by placing three dots (...) before the parameter name. For example, function myFunc(...args) {} allows you to pass any number of arguments.

Can you give me an example of using spread parameters with an array?

Absolutely! If you have an array const arr = [1, 2, 3];, you can use spread parameters like this: const newArr = [...arr, 4, 5]; which results in [1, 2, 3, 4, 5].

What about using spread parameters with objects?

You can also use them with objects! For instance, const obj = {a: 1, b: 2}; const newObj = {...obj, c: 3}; creates a new object {a: 1, b: 2, c: 3}.