Find nth element of Array using Javascript methods

I want to write a program to get nth element of given array in javascript. Using javascript methods. Also do not want to use slice. Please guide me on this.

I have tried this

const array = [1, 2, 3, 5]

function filterItems(array, index) {
            return array[index];
        }
        console.log(filterItems(array, 0));

this will output 1. but how to do using javascript methods and without using slice