js function to adding a element in an array code example

Example 1: js add function to array

//create an new function that can be used by any array
Array.prototype.second = function() {
  return this[1];
};

var myArray = ["item1","item2","item3"];
console.log(myArray.second());//returns 'item2'

Example 2: how to make and add to an array in javascript

var arrayExample = [53,'Hello World!'];
console.log(arrayExample) //Output =>
[53,'Hello World!']

//You can also do this
arrayExample.push(true);

console.log(arrayExample); //Output =>
[53,'Hello World!',true];