The answer
It depends on the company. Some allow React, some require vanilla JS. Ask the interviewer. If you have a choice, use what you are fastest with. Vanilla JS shows strong fundamentals; React shows framework proficiency.
What Is the Machine Coding Round in Frontend Interviews?
Should I use React or vanilla JavaScript in the machine coding round?
More FAQs in What Is the Machine Coding Round in Frontend Interviews?
A 90-minute round where you build a UI component or small app from scratch in HTML, CSS, and JavaScript. You are evaluated on functionality, code quality, edge cases, UI/UX, and approach.
OTP input, progress bar, autocomplete search bar, pagination, tab form, file explorer, food ordering app, image carousel, accordion, and modal. Practice building each in 90 minutes.
0-10 min: read and plan. 10-60 min: build core. 60-80 min: edge cases and features. 80-90 min: test and polish. Build the minimum viable feature first, then add features.
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