get the last element of array javascript

var foods = ["kiwi","apple","banana"];
var banana = foods[foods.length - 1]; // Getting last element

var colors = ["red","blue","green"];
var green = colors[colors.length - 1];//get last item in the array

var numbers = ["one", "two", "three"];
var lastnumber = numbers[numbers.length - 1];
console.log(lastnumber);

arr.slice(-1)[0] 

arr.slice(-1)[0] 

.pop();

var array = [1,2,3,4,5,6];
var val = array[array.length - 1]; // 6

var linkElement = document.getElementById("BackButton");
var loc_array = document.location.href.split('/');
var newT = document.createTextNode(unescape(capWords(loc_array[loc_array.length-2]))); 
linkElement.appendChild(newT);

let colors = ["red", "yellow", "green"];
let lastELement = colors[colors.length - 1]