getting last element of array javascript

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

arr.slice(-1)[0] 

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

arr.slice(-1)[0] 

.pop();

var colors = ["black", "white", "red", "yellow"];
var yellow = colors[colors.length - 1];

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

if (loc_array[loc_array.length - 1] === 'index.html') {
   // do something
} else {
   // something else
}

const myArray = [1, 2, 3]

console.log(myArray.item(-1))
//=> 3