spread syntax vs slice method

Question

I was trying to understand what is the difference between spread syntax vs slice method in the following approach.

suppose I want to make an actual copy of an array,

Answer 1

Performance will depend on the engine where its' running. And as with most Javscript code, it will probably be running in various different engines. So, use whatever feels aesthetically better. For me that's spread.

... is sheer beauty.

If you decide to go with slice, skip the 0, just say .slice().