How to find last element of an array without modifying source array in Vanilla Javascript

Question

I have an array contains

const data = ['a', 'b', 'c', 'd'];

how to find the last element, result should be 'd'

Answer 1

Using the function slice + destructuring assignment.

const data = ['a', 'b', 'c', 'd'],
      [last] = data.slice(-1);

console.log(last);

Answer 2

You could slice from the end (negative index) and get the item of the array.

const data = ['a', 'b', 'c', 'd'];

console.log(data.slice(-1)[0]);