editing array with function javascript code example

Example 1: how to modify an array

let browsers = ['chrome', 'firefox', 'edge'];
browsers.unshift('safari');
console.log(browsers); //  ["safari", "chrome", "firefox", "edge"]

Example 2: how to modify an array

let firstNumbers = [1, 2, 3];
let secondNumbers = [4, 5, 6];
let merged = firstNumbers.concat(secondNumbers);
console.log(merged); // [1, 2, 3, 4, 5, 6]