How to Flatten an Array in JavaScript: A Practical Guide
In JavaScript, flattening an array can be a common task. Fortunately, the ES2019 update introduced two new methods, flat and flatMap, to the Array prototype to simplify this process. However, it’s essential to note that these methods are only supported by more recent versions of browsers such as Firefox 62+, Chrome 69+, Edge 76+, and Safari 12+. If you need to support older browsers, you can consider using Babel to backport your code to a previous ECMAScript version....