JavaScript get the last element of an array

Getting the last element of an array is a frequently encountered scenario, and you must have your own commonly used methods. Maybe there's a moment when you're thinking as much as I am: "How does it count to be elegant?".

Suppose we have the following array:

 let arr = ['cat','doggy','pig'];

Take a look at what methods are available to get the last element of an array, and see which one you use most often.

by length

 arr[arr.length-1]
'pig'

arr.slice()

 arr.slice(-1)[0] 
'pig'

arr.pop()

 arr.pop() // 会改变原素组

arr.slice(-1).pop() // 这样不会改变原数组

The above methods can be implemented, but they are not elegant. The following is the method I think is more elegant.

Array.prototype.at()

 arr.at(-1)
'pig'

Simple and clear, in one step. What do you think? There is a better way, let me know in the comments.