in javascript how to invoke from an array code example

Example 1: create array from htmlcollection

//Use the Array.from() method to convert a nodelist or HTMLcollection into an array.

let elements = document.getElementsByClassName("classnameHere");
let arrayOfElements = Array.from(elements);

//Now arrayOfElements is iterable with methods such as .forEach().

Example 2: how to create array in javascript

/* 
	Array class is a global object that is used
    in the construction of arrays
    
    See - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array
*/
let array_1 = new Array(2);
	arr.push("James");
	arr.push("Fred");

let array_2 = ["James", "Fred"];