I have array [1, 2, 3, 4, 5, 6]
How to get last 3 elements 6, 5, 4 by DESC
I use slice but I get the items in the wrong order
it seems you want to reverse the array you have sliced.
let arr = [1, 2, 3, 4, 5, 6]
let newArr = arr.slice(-3).reverse();
console.log(newArr)if your last 3 elements are not in ascending order already in the original array you can use sort after slice. Well you can use sort for your original problem as well
let arr = [1, 2, 3, 5, 4, 6]
let newArr2 = arr.slice(-3).sort((a,b)=>b-a);
console.log(newArr2)