What are some alternatives to the spread operator in JavaScript?

What are some alternatives to the spread operator in JavaScript?

You can use methods like Object.assign() for objects or Array.prototype.concat() for arrays.

Can you give me an example using Object.assign()?

Sure! You can merge two objects like this: const merged = Object.assign({}, obj1, obj2);.

What about arrays? How can I merge them without the spread operator?

You can use Array.prototype.concat(), like this: const mergedArray = array1.concat(array2);.

Are there any performance differences between these methods?

Yes, performance can vary based on the size of the objects or arrays, but generally, the spread operator is more concise.