Should I implement polyfills for JavaScript interview preparation?
Yes. Implement map, filter, reduce, bind, and Promise.all from scratch. This tests your understanding of how these methods work internally. Interviewers frequently ask for polyfills.
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More FAQs in How to Study for a JavaScript Interview
Week 1: fundamentals (closures, this, call/apply/bind). Week 2: async (event loop, promises, async/await). Week 3: patterns (currying, debounce, throttle). Week 4: DOM (events, bubbling, delegation, CORS). Week 5: prototypes, polyfills. Week 6: practice and mock interviews. 6 weeks of consistent study.
4-6 weeks of consistent study (1-2 hours per day). This gives enough time to understand each concept deeply, implement from scratch, and practice. Cramming in 1-2 days is not enough for deep JS understanding.
Read the concept, implement it from scratch (no libraries), explain it out loud in simple terms, solve variations, and review after a week. Practice 50+ questions. Do mock interviews with friends or on platforms like Pramp.
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