String Polyfills and Common Interview Methods in JavaScript

Introduction In this blog, you are going to learn how JavaScript built-in methods work internally. You will also learn how developers make JavaScript compatible with older browsers using polyfills. What are polyfills : A polyfill is a piece of JavaScript code that adds support for modern features in older browsers that don’t support them natively. If the browser doesn’t have a feature, we create it ourselves. Example : Let's take an example that older browser doesn't support Array.prototype.incl