js last array element

var my_array = /* some array here */;
var last_element = my_array[my_array.length - 1];let nums = [1,2,3,4,5];
let lastOne = nums.pop();
// -> lastOne = 5
// -> nums = [1,2,3,4];const lastItem = colors[colors.length - 1]
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);