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AI mock interview for Frontend Developers
Practice the questions frontend interviews actually ask — the event loop, rendering performance, state management, accessibility — and get a report that separates what you know from how you explained it.
Free 10-minute interview with a full report. Paid plans run full-length sessions.
Frontend Developer interview questions you might get
A sample of the starting questions. The live interview follows up on your answer, so no two sessions go the same way.
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Explain what happens between typing a URL and seeing a painted page. Where would you look first if it felt slow?
What it tests: End-to-end browser understanding.
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A list of 5,000 rows makes the page janky when filtering. How do you fix it?
What it tests: Virtualization, memoization and debouncing trade-offs.
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Build an accessible modal dialog. What has to happen with focus?
What it tests: Accessibility done properly, not as an afterthought.
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When would you lift state up versus reach for a global store?
What it tests: State ownership judgment.
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Predict the output order of this snippet mixing setTimeout, a resolved promise and console.log.
What it tests: Event loop and microtask queue.
How a session works
About 20–30 minutes from setup to report. End any time and you still get feedback on what was covered.
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Set your target
Pick a role, level and stack. Add a job description or your resume if you want questions about your real projects.
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Answer live
Speak or type. The interviewer follows up on thin answers, raises the difficulty when you're doing well and switches to code when it fits.
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Read the notes
A report scores every competency, quotes the answers that cost you, and gives you a prep plan for the next session.
A report that quotes you, not a pat on the back
Every score links back to something you actually said.
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Competency scores
Weighted to the role you picked, so a system design gap counts more for a senior backend role than for a frontend junior.
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STAR check on every story
See which part of each behavioral answer was missing — usually the Result.
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How you sounded
Filler words, hedging, "I" versus "we", and whether you cited real numbers — measured from your words, and compared between the first and second half of the interview.
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A prep plan
The two or three things to practice next, and a skill graph that tracks them across sessions.
Competencies — sample report
STAR — "Tell me about a missed deadline"
How you sounded
Questions
Do I need to use React?
No. Mention your framework in the setup and questions adapt. React is the default because it is the most common in frontend interviews.
Will it ask me to write code?
It can. Technical sessions may include a coding question where you write and explain a component or a utility function.
What does the report show?
A score per competency, the answers that pulled each score down with the reason, communication analytics and a prioritized prep plan.
Is it free to try?
Yes. Each month you get a free interview of up to 10 minutes with its scored report. Paid plans add full-length interviews, every track and the full 360 report.