JS + Polyfills + GreatFrontEnd = Interview Confidence. Learning JavaScript polyfills was a turning point in my frontend interview prep. Implementing methods like Array.prototype.map, bind, or Promise.all deepened my understanding of how JavaScript works under the hood. What really helped? GreatFrontEnd. Their challenges on re-creating core JS methods were spot-on – practical, clear, and exactly the kind of stuff that comes up in interviews. If you're preparing for frontend interviews, don't just memorize, implement. GreatFrontEnd is an excellent place to start.
