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Trivia Quiz

A 10-question trivia game with score tracking and instant feedback.

fun
12 downloads

By Lucas

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name: Trivia Quiz description: "A 10-question trivia game with score tracking and instant feedback." category: fun connections: [] version: 1

What it does

Trivia Quiz draws 10 random questions from a built-in bank of 20 general-knowledge questions (capitals, science, history, and sports basics). Each answer gets instant correct/incorrect feedback with the right answer highlighted. Great for a quick brain warm-up or challenging friends.

Setup

  • Open app.html in any browser (works from disk via file://).
  • Tap "Start Quiz" to play a new game of 10 random questions.
  • Your best score is saved automatically and shown on the start screen.

Source

app.html — the complete app (single self-contained file: HTML, CSS, and JavaScript, no external dependencies):

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Trivia Quiz</title>
<style>
  * { box-sizing: border-box; }
  body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(160deg, #2b2d6e, #5b2a86);
    min-height: 100vh;
    color: #fff;
    padding: 20px 12px 40px;
  }
  .wrap { max-width: 480px; margin: 0 auto; }
  h1 { text-align: center; font-size: 2rem; margin: 8px 0 2px; }
  .subtitle { text-align: center; opacity: 0.85; margin-bottom: 18px; font-size: 0.95rem; }
  .card {
    background: rgba(255,255,255,0.10);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 14px;
    padding: 20px;
    backdrop-filter: blur(4px);
  }
  .hud { display: flex; justify-content: space-between; margin-bottom: 12px; font-size: 0.9rem; opacity: 0.9; }
  .progress { height: 8px; background: rgba(255,255,255,0.18); border-radius: 6px; overflow: hidden; margin-bottom: 16px; }
  .progress > div { height: 100%; background: #ffd166; border-radius: 6px; transition: width 0.3s; }
  .question { font-size: 1.2rem; font-weight: 600; margin: 0 0 16px; line-height: 1.4; }
  .opt {
    display: block; width: 100%;
    margin-bottom: 10px; padding: 13px 14px;
    font-size: 1rem; color: #fff; text-align: left;
    background: rgba(255,255,255,0.12);
    border: 2px solid rgba(255,255,255,0.25);
    border-radius: 10px; cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
  }
  .opt:hover:not(:disabled) { background: rgba(255,255,255,0.20); }
  .opt:disabled { cursor: default; opacity: 0.95; }
  .opt.correct { background: #2a9d48; border-color: #2a9d48; }
  .opt.wrong { background: #c0392b; border-color: #c0392b; }
  .feedback { min-height: 1.6em; text-align: center; font-weight: 600; margin: 6px 0 12px; }
  .btn {
    display: inline-block; padding: 12px 26px;
    font-size: 1rem; font-weight: 700; color: #2b2d6e;
    background: #ffd166; border: none; border-radius: 10px; cursor: pointer;
  }
  .btn:hover { background: #ffce54; }
  .center { text-align: center; }
  .big-score { font-size: 3.2rem; font-weight: 800; margin: 6px 0; }
  .best { opacity: 0.9; margin-bottom: 18px; }
  .hidden { display: none; }
  .label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; opacity: 0.8; }
</style>
</head>
<body>
<div class="wrap">
  <h1>Trivia Quiz</h1>
  <p class="subtitle">10 questions. One brain. How many can you get?</p>

  <div id="startScreen" class="card center">
    <p class="label">Best score</p>
    <div class="big-score" id="bestStart">–</div>
    <p>Tap below to start a new game. Questions are drawn at random from a bank of 20.</p>
    <button class="btn" id="startBtn">Start Quiz</button>
  </div>

  <div id="gameScreen" class="card hidden">
    <div class="hud">
      <span id="qCount">Question 1/10</span>
      <span id="scoreHud">Score: 0</span>
    </div>
    <div class="progress"><div id="progBar" style="width:0%"></div></div>
    <p class="question" id="qText"></p>
    <div id="options"></div>
    <div class="feedback" id="feedback"></div>
    <div class="center">
      <button class="btn hidden" id="nextBtn">Next Question</button>
    </div>
  </div>

  <div id="endScreen" class="card center hidden">
    <p class="label">Your score</p>
    <div class="big-score" id="finalScore">0/10</div>
    <p id="verdict"></p>
    <p class="best">Best score: <span id="bestEnd">–</span></p>
    <button class="btn" id="againBtn">Play Again</button>
  </div>
</div>

<script>
"use strict";

var QUESTIONS = [
  { q: "What is the capital of France?", options: ["London", "Berlin", "Paris", "Madrid"], answer: 2 },
  { q: "Which planet is known as the Red Planet?", options: ["Venus", "Mars", "Jupiter", "Saturn"], answer: 1 },
  { q: "What is the chemical formula for water?", options: ["CO2", "O2", "H2O", "NaCl"], answer: 2 },
  { q: "How many continents are there on Earth?", options: ["5", "6", "7", "8"], answer: 2 },
  { q: "What is the largest ocean on Earth?", options: ["Atlantic", "Indian", "Arctic", "Pacific"], answer: 3 },
  { q: "In which year did humans first land on the Moon?", options: ["1959", "1969", "1979", "1989"], answer: 1 },
  { q: "Who wrote 'Romeo and Juliet'?", options: ["Charles Dickens", "Jane Austen", "William Shakespeare", "Mark Twain"], answer: 2 },
  { q: "What is the largest planet in our solar system?", options: ["Earth", "Saturn", "Jupiter", "Neptune"], answer: 2 },
  { q: "How many legs does a spider have?", options: ["6", "8", "10", "12"], answer: 1 },
  { q: "What is the capital of Australia?", options: ["Sydney", "Melbourne", "Canberra", "Perth"], answer: 2 },
  { q: "How many rings are on the Olympic flag?", options: ["4", "5", "6", "7"], answer: 1 },
  { q: "Which sport is played with a puck?", options: ["Basketball", "Ice hockey", "Tennis", "Golf"], answer: 1 },
  { q: "How many players are on a soccer (football) team on the field?", options: ["9", "10", "11", "12"], answer: 2 },
  { q: "What is the currency of Japan?", options: ["Won", "Yuan", "Yen", "Ringgit"], answer: 2 },
  { q: "At sea level, water boils at what temperature in Celsius?", options: ["90°C", "100°C", "110°C", "120°C"], answer: 1 },
  { q: "The Great Wall is located in which country?", options: ["India", "China", "Egypt", "Mexico"], answer: 1 },
  { q: "How many days are in a leap year?", options: ["365", "366", "367", "364"], answer: 1 },
  { q: "Which river flows through Egypt?", options: ["Amazon", "Nile", "Danube", "Mississippi"], answer: 1 },
  { q: "Which of these animals is a marsupial?", options: ["Kangaroo", "Polar bear", "Giraffe", "Wolf"], answer: 0 },
  { q: "What is the capital of Canada?", options: ["Toronto", "Vancouver", "Ottawa", "Montreal"], answer: 2 }
];

var TOTAL_PER_GAME = 10;
var game = [];
var currentIndex = 0;
var score = 0;
var locked = false;

var startScreen = document.getElementById("startScreen");
var gameScreen = document.getElementById("gameScreen");
var endScreen = document.getElementById("endScreen");
var qCount = document.getElementById("qCount");
var scoreHud = document.getElementById("scoreHud");
var progBar = document.getElementById("progBar");
var qText = document.getElementById("qText");
var optionsBox = document.getElementById("options");
var feedback = document.getElementById("feedback");
var nextBtn = document.getElementById("nextBtn");
var startBtn = document.getElementById("startBtn");
var againBtn = document.getElementById("againBtn");
var bestStart = document.getElementById("bestStart");
var bestEnd = document.getElementById("bestEnd");
var finalScore = document.getElementById("finalScore");
var verdict = document.getElementById("verdict");

function getBest() {
  var v = window.localStorage.getItem("triviaQuizBest");
  return v === null ? null : parseInt(v, 10);
}

function setBest(v) {
  window.localStorage.setItem("triviaQuizBest", String(v));
}

function showBest() {
  var b = getBest();
  var text = b === null ? "–" : b + "/" + TOTAL_PER_GAME;
  bestStart.textContent = text;
  bestEnd.textContent = text;
}

function shuffle(arr) {
  var a = arr.slice();
  for (var i = a.length - 1; i > 0; i--) {
    var j = Math.floor(Math.random() * (i + 1));
    var t = a[i]; a[i] = a[j]; a[j] = t;
  }
  return a;
}

function startGame() {
  game = shuffle(QUESTIONS).slice(0, TOTAL_PER_GAME);
  currentIndex = 0;
  score = 0;
  startScreen.classList.add("hidden");
  endScreen.classList.add("hidden");
  gameScreen.classList.remove("hidden");
  renderQuestion();
}

function renderQuestion() {
  locked = false;
  feedback.textContent = "";
  nextBtn.classList.add("hidden");
  var item = game[currentIndex];
  qCount.textContent = "Question " + (currentIndex + 1) + "/" + TOTAL_PER_GAME;
  scoreHud.textContent = "Score: " + score;
  progBar.style.width = (currentIndex / TOTAL_PER_GAME * 100) + "%";
  qText.textContent = item.q;
  optionsBox.innerHTML = "";
  item.options.forEach(function(opt, i) {
    var b = document.createElement("button");
    b.className = "opt";
    b.textContent = opt;
    b.addEventListener("click", function() { pickAnswer(i); });
    optionsBox.appendChild(b);
  });
}

function pickAnswer(i) {
  if (locked) return;
  locked = true;
  var item = game[currentIndex];
  var buttons = optionsBox.children;
  buttons[item.answer].classList.add("correct");
  if (i === item.answer) {
    score++;
    scoreHud.textContent = "Score: " + score;
    feedback.textContent = "Correct! Well done.";
  } else {
    buttons[i].classList.add("wrong");
    feedback.textContent = "Incorrect — the answer was: " + item.options[item.answer];
  }
  for (var k = 0; k < buttons.length; k++) buttons[k].disabled = true;
  nextBtn.textContent = (currentIndex === TOTAL_PER_GAME - 1) ? "See Results" : "Next Question";
  nextBtn.classList.remove("hidden");
}

function nextQuestion() {
  if (currentIndex < TOTAL_PER_GAME - 1) {
    currentIndex++;
    renderQuestion();
  } else {
    endGame();
  }
}

function endGame() {
  gameScreen.classList.add("hidden");
  endScreen.classList.remove("hidden");
  finalScore.textContent = score + "/" + TOTAL_PER_GAME;
  var msg;
  if (score === TOTAL_PER_GAME) msg = "Perfect score! You are a trivia champion.";
  else if (score >= 8) msg = "Excellent work — nearly perfect!";
  else if (score >= 6) msg = "Solid knowledge. Keep it up!";
  else if (score >= 4) msg = "Not bad — room to grow.";
  else msg = "Tough round! Give it another shot.";
  verdict.textContent = msg;
  var best = getBest();
  if (best === null || score > best) {
    setBest(score);
    bestEnd.textContent = score + "/" + TOTAL_PER_GAME + " (new best!)";
  } else {
    showBest();
  }
  showBest();
}

startBtn.addEventListener("click", startGame);
againBtn.addEventListener("click", startGame);
nextBtn.addEventListener("click", nextQuestion);
showBest();
</script>
</body>
</html>

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