What is the difference between Array.from and the spread operator?

What is the difference between Array.from and the spread operator?

Array.from creates a new array from an array-like or iterable object, while the spread operator expands elements into an array.

Can you give me an example of how to use both?

Sure! Using Array.from: const arr = Array.from('hello'); results in ['h', 'e', 'l', 'l', 'o']. Using the spread operator: const arr = [...'hello']; gives the same result.

Are there any performance differences between the two?

Generally, Array.from can be slightly slower due to its additional functionality, but the difference is often negligible for small arrays.

When should I use one over the other?

Use Array.from when you need to convert array-like objects or want to apply a mapping function. Use the spread operator for simpler cases of expanding elements.