last element of an array

var my_array = /* some array here */;
var last_element = my_array[my_array.length - 1];

let arr = [1,2,3]
arr[arr.length - 1] //returns last element in an array

arr.slice(-1)[0] 

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

// Find the last item in an array.

arrayName[arrayName.length - 1]

var last = arr.slice(-1)[0]

var myArray = [1, 2, 3, 4];
myArray[myArray.length - 1];

let arr = ['a', 'b', 'c']
arr.slice(-1)[0] // returns last element in an array

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