50projects50days/quiz-app/script.js
Brad Traversy 9a25d6022f Quiz app
2020-10-20 09:28:28 -04:00

98 lines
2.4 KiB
JavaScript

const quizData = [
{
question: "Which language runs in a web browser?",
a: "Java",
b: "C",
c: "Python",
d: "JavaScript",
correct: "d",
},
{
question: "What does CSS stand for?",
a: "Central Style Sheets",
b: "Cascading Style Sheets",
c: "Cascading Simple Sheets",
d: "Cars SUVs Sailboats",
correct: "b",
},
{
question: "What does HTML stand for?",
a: "Hypertext Markup Language",
b: "Hypertext Markdown Language",
c: "Hyperloop Machine Language",
d: "Helicopters Terminals Motorboats Lamborginis",
correct: "a",
},
{
question: "What year was JavaScript launched?",
a: "1996",
b: "1995",
c: "1994",
d: "none of the above",
correct: "b",
},
];
const quiz = document.getElementById('quiz')
const answerEls = document.querySelectorAll('.answer')
const questionEl = document.getElementById('question')
const a_text = document.getElementById('a_text')
const b_text = document.getElementById('b_text')
const c_text = document.getElementById('c_text')
const d_text = document.getElementById('d_text')
const submitBtn = document.getElementById('submit')
let currentQuiz = 0
let score = 0
loadQuiz()
function loadQuiz() {
deselectAnswers()
const currentQuizData = quizData[currentQuiz]
questionEl.innerText = currentQuizData.question
a_text.innerText = currentQuizData.a
b_text.innerText = currentQuizData.b
c_text.innerText = currentQuizData.c
d_text.innerText = currentQuizData.d
}
function deselectAnswers() {
answerEls.forEach(answerEl => answerEl.checked = false)
}
function getSelected() {
let answer
answerEls.forEach(answerEl => {
if(answerEl.checked) {
answer = answerEl.id
}
})
return answer
}
submitBtn.addEventListener('click', () => {
const answer = getSelected()
if(answer) {
if(answer === quizData[currentQuiz].correct) {
score++
}
currentQuiz++
if(currentQuiz < quizData.length) {
loadQuiz()
} else {
quiz.innerHTML = `
<h2>You answered ${score}/${quizData.length} questions correctly</h2>
<button onclick="location.reload()">Reload</button>
`
}
}
})