how do you use math.random using html elements in an array in javascript code example

Example 1: how to get a random element of an array javascript

var foodItems = ["Bannana", "Apple", "Orange"];
var theFood = foodItems[Math.floor(Math.random() * foodItems.length)];
/* Will pick a random number from the length of the array and will go to the
corosponding number in the array E.G: 0 = Bannana */

Example 2: get random elements from array javascript

array.sort(() => Math.random() - Math.random()).slice(0, n)