怎么優雅的獲取數組最后一項.

const arr = [1,2,3,4,5]

1：const [lastItem] = arr.slice(-1)  

console.log(lastItem)

 

2:const len = arr.length

console.log(arr[len-1])

 

3: const lastItem = arr.pop()

 

4：const {length,last:length-1} = arr 

cosole.log(arr[last])

5: const [lastItem,...rest] = [...arr].reverse()

console.log(lastItem)