How to Deep clone in javascript

Question

How do you deep clone a JavaScript object?

I know there are various functions based on frameworks like JSON.parse(JSON.stringify(o)) and $.extend(t

Answer 1

my addition to all the answers

function deepCopy(arr) {
  if (typeof arr !== 'object') return arr
  if (Array.isArray(arr)) return [...arr].map(deepCopy)
  for (const prop in arr) 
    copy[prop] = deepCopy(arr[prop])
  return copy
}