https://www.briangonzalez.org/post/copying-array-javascript
const names = [ 'Jon', 'Jacob', 'Jeff' ]
const copy1 = names.slice() const copy2 = [].concat(names) const copy3 = Object.values(names) const copy4 = [...names] const copy5 = Array.of(...names) const copy6 = JSON.parse(JSON.stringify(names))