add element of an array to a string javascript code example

Example 1: how to push items in array in javascript

let items = [1, 2, 3]
items.push(4); // items = [1, 2, 3, 4]

Example 2: js array push

const arr = ["foo", "bar"];
arr.push('baz'); // 3
arr; // ["foo", "bar", "baz"]