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Lesson 19 — Project 3: Quiz App Cheat Sheet

Full-Stack

In one line: A data-driven quiz app: questions live in an array, rendered dynamically, with a per-question timer and a persisted high score.

Build Checklist

110+ questions as an array of objects

2Render current question dynamically

3Score updates on answer click

4Countdown timer per question

5Results screen + restart button

localStorage Pattern

const best = Math.max(score, Number(localStorage.getItem('highScore')) || 0); localStorage.setItem('highScore', best); const highScore = localStorage.getItem('highScore') || 0;