Hello readers, today in this blog you will learn how to create a quiz application with timer using HTML CSS and JavaScript. Earlier I shared a blog about how to create a responsive personal portfolio website and now it's time to create a quiz web app using JavaScript.
This program [quiz app with timer], has three levels or boxes and these boxes are shown by clicking on a specific button. First, on the webpage, a button labeled "Start Quiz" is displayed and when you click on that button, the info box with popup animation appears.
This infobox contains some quiz rules and two buttons labeled "Exit" and "Continue". When you click the exit button, the info box is hidden but when you click the continue button, the quiz box appears.
Create a quiz app with timer using HTML CSS and JavaScript
The quiz box has a title with a title on the left and a timer box on the right. This timer starts to decrease in 15 to 0 seconds and there is also a timeline indicator that slides from left to right according to the timer. If the user selects an option within 15 to 0 seconds, the timer will be turned off and all available options will be disabled.
If the user's selected option is correct, the color of the selected option, the background color changes to green, and a tick icon is displayed to notify the user that the selected answer is correct. If the user selects an incorrect option, the color of the selected option, the background color turns red, and a cross icon is displayed to notify the user that the selected option is incorrect and the correct option will be selected automatically.
If the user does not select an option within 15 to 0 seconds, the timer will stop when it reaches 0 and the correct option for that query will be selected automatically. Next, there are next buttons to show the next question and this quiz has a total of five questions.
Finally, the result box will be displayed and the user's score and two buttons [Replay Quiz, Quiz Quiz] will be displayed. Clicking will reload the current window and the quiz will start from scratch.
In the video, you see the actual preview of the quiz application with timer and I hope you understand the code behind creating this quiz box layout. In this video, I have written only HTML and CSS code, and in the second part of this video, I have completed the JavaScript codes of this program. If you haven't seen Part 2 of this video, click here to watch it now.
You can use this quiz and you can also add more questions to this quiz. In the source code, I've written a lot of comments about how you can add more questions and explain every Javascript line in this quiz. If you are a beginner, you may have difficulty understanding JavaScript codes but you can easily understand HTML and CSS codes and I have tried to explain all the JavaScript lines including comments, hope you understand.
To create this program (quiz application with timer). First you need to create four files, one HTML file, one CSS file and the other two JavaScript files. After creating these files, paste the following codes into your file.
First, create an HTML file named index.html and paste the provided code into your HTML file. Remember, you need to create a file with the .html extension.
<!DOCTYPE html>
<!-- Created By MasudComputerBD - www.masudcomputerbd.com -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Awesome Quiz App | MasudComputerBD</title>
<link rel="stylesheet" href="style.css">
<!-- FontAweome CDN Link for Icons -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css"/>
</head>
<body>
<!-- start Quiz button -->
<div class="start_btn"><button>Start Quiz</button></div>
<!-- Info Box -->
<div class="info_box">
<div class="info-title"><span>Some Rules of this Quiz</span></div>
<div class="info-list">
<div class="info">1. You will have only <span>15 seconds</span> per each question.</div>
<div class="info">2. Once you select your answer, it can't be undone.</div>
<div class="info">3. You can't select any option once time goes off.</div>
<div class="info">4. You can't exit from the Quiz while you're playing.</div>
<div class="info">5. You'll get points on the basis of your correct answers.</div>
</div>
<div class="buttons">
<button class="quit">Exit Quiz</button>
<button class="restart">Continue</button>
</div>
</div>
<!-- Quiz Box -->
<div class="quiz_box">
<header>
<div class="title">Awesome Quiz Application</div>
<div class="timer">
<div class="time_left_txt">Time Left</div>
<div class="timer_sec">15</div>
</div>
<div class="time_line"></div>
</header>
<section>
<div class="que_text">
<!-- Here I've inserted question from JavaScript -->
</div>
<div class="option_list">
<!-- Here I've inserted options from JavaScript -->
</div>
</section>
<!-- footer of Quiz Box -->
<footer>
<div class="total_que">
<!-- Here I've inserted Question Count Number from JavaScript -->
</div>
<button class="next_btn">Next Que</button>
</footer>
</div>
<!-- Result Box -->
<div class="result_box">
<div class="icon">
<i class="fas fa-crown"></i>
</div>
<div class="complete_text">You've completed the Quiz!</div>
<div class="score_text">
<!-- Here I've inserted Score Result from JavaScript -->
</div>
<div class="buttons">
<button class="restart">Replay Quiz</button>
<button class="quit">Quit Quiz</button>
</div>
</div>
<!-- Inside this JavaScript file I've inserted Questions and Options only -->
<script src="js/questions.js"></script>
<!-- Inside this JavaScript file I've coded all Quiz Codes -->
<script src="js/script.js"></script>
</body>
</html>
</html>
Second, create a CSS file named style.css and paste the provided code into your CSS file. Remember, you need to create a file with the .css extension.
/* importing google fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap');
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
body{
background: #007bff;
}
::selection{
color: #fff;
background: #007bff;
}
.start_btn,
.info_box,
.quiz_box,
.result_box{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2),
0 6px 20px 0 rgba(0, 0, 0, 0.19);
}
.info_box.activeInfo,
.quiz_box.activeQuiz,
.result_box.activeResult{
opacity: 1;
z-index: 5;
pointer-events: auto;
transform: translate(-50%, -50%) scale(1);
}
.start_btn button{
font-size: 25px;
font-weight: 500;
color: #007bff;
padding: 15px 30px;
outline: none;
border: none;
border-radius: 5px;
background: #fff;
cursor: pointer;
}
.info_box{
width: 540px;
background: #fff;
border-radius: 5px;
transform: translate(-50%, -50%) scale(0.9);
opacity: 0;
pointer-events: none;
transition: all 0.3s ease;
}
.info_box .info-title{
height: 60px;
width: 100%;
border-bottom: 1px solid lightgrey;
display: flex;
align-items: center;
padding: 0 30px;
border-radius: 5px 5px 0 0;
font-size: 20px;
font-weight: 600;
}
.info_box .info-list{
padding: 15px 30px;
}
.info_box .info-list .info{
margin: 5px 0;
font-size: 17px;
}
.info_box .info-list .info span{
font-weight: 600;
color: #007bff;
}
.info_box .buttons{
height: 60px;
display: flex;
align-items: center;
justify-content: flex-end;
padding: 0 30px;
border-top: 1px solid lightgrey;
}
.info_box .buttons button{
margin: 0 5px;
height: 40px;
width: 100px;
font-size: 16px;
font-weight: 500;
cursor: pointer;
border: none;
outline: none;
border-radius: 5px;
border: 1px solid #007bff;
transition: all 0.3s ease;
}
.quiz_box{
width: 550px;
background: #fff;
border-radius: 5px;
transform: translate(-50%, -50%) scale(0.9);
opacity: 0;
pointer-events: none;
transition: all 0.3s ease;
}
.quiz_box header{
position: relative;
z-index: 2;
height: 70px;
padding: 0 30px;
background: #fff;
border-radius: 5px 5px 0 0;
display: flex;
align-items: center;
justify-content: space-between;
box-shadow: 0px 3px 5px 1px rgba(0,0,0,0.1);
}
.quiz_box header .title{
font-size: 20px;
font-weight: 600;
}
.quiz_box header .timer{
color: #004085;
background: #cce5ff;
border: 1px solid #b8daff;
height: 45px;
padding: 0 8px;
border-radius: 5px;
display: flex;
align-items: center;
justify-content: space-between;
width: 145px;
}
.quiz_box header .timer .time_left_txt{
font-weight: 400;
font-size: 17px;
user-select: none;
}
.quiz_box header .timer .timer_sec{
font-size: 18px;
font-weight: 500;
height: 30px;
width: 45px;
color: #fff;
border-radius: 5px;
line-height: 30px;
text-align: center;
background: #343a40;
border: 1px solid #343a40;
user-select: none;
}
.quiz_box header .time_line{
position: absolute;
bottom: 0px;
left: 0px;
height: 3px;
background: #007bff;
}
section{
padding: 25px 30px 20px 30px;
background: #fff;
}
section .que_text{
font-size: 25px;
font-weight: 600;
}
section .option_list{
padding: 20px 0px;
display: block;
}
section .option_list .option{
background: aliceblue;
border: 1px solid #84c5fe;
border-radius: 5px;
padding: 8px 15px;
font-size: 17px;
margin-bottom: 15px;
cursor: pointer;
transition: all 0.3s ease;
display: flex;
align-items: center;
justify-content: space-between;
}
section .option_list .option:last-child{
margin-bottom: 0px;
}
section .option_list .option:hover{
color: #004085;
background: #cce5ff;
border: 1px solid #b8daff;
}
section .option_list .option.correct{
color: #155724;
background: #d4edda;
border: 1px solid #c3e6cb;
}
section .option_list .option.incorrect{
color: #721c24;
background: #f8d7da;
border: 1px solid #f5c6cb;
}
section .option_list .option.disabled{
pointer-events: none;
}
section .option_list .option .icon{
height: 26px;
width: 26px;
border: 2px solid transparent;
border-radius: 50%;
text-align: center;
font-size: 13px;
pointer-events: none;
transition: all 0.3s ease;
line-height: 24px;
}
.option_list .option .icon.tick{
color: #23903c;
border-color: #23903c;
background: #d4edda;
}
.option_list .option .icon.cross{
color: #a42834;
background: #f8d7da;
border-color: #a42834;
}
footer{
height: 60px;
padding: 0 30px;
display: flex;
align-items: center;
justify-content: space-between;
border-top: 1px solid lightgrey;
}
footer .total_que span{
display: flex;
user-select: none;
}
footer .total_que span p{
font-weight: 500;
padding: 0 5px;
}
footer .total_que span p:first-child{
padding-left: 0px;
}
footer button{
height: 40px;
padding: 0 13px;
font-size: 18px;
font-weight: 400;
cursor: pointer;
border: none;
outline: none;
color: #fff;
border-radius: 5px;
background: #007bff;
border: 1px solid #007bff;
line-height: 10px;
opacity: 0;
pointer-events: none;
transform: scale(0.95);
transition: all 0.3s ease;
}
footer button:hover{
background: #0263ca;
}
footer button.show{
opacity: 1;
pointer-events: auto;
transform: scale(1);
}
.result_box{
background: #fff;
border-radius: 5px;
display: flex;
padding: 25px 30px;
width: 450px;
align-items: center;
flex-direction: column;
justify-content: center;
transform: translate(-50%, -50%) scale(0.9);
opacity: 0;
pointer-events: none;
transition: all 0.3s ease;
}
.result_box .icon{
font-size: 100px;
color: #007bff;
margin-bottom: 10px;
}
.result_box .complete_text{
font-size: 20px;
font-weight: 500;
}
.result_box .score_text span{
display: flex;
margin: 10px 0;
font-size: 18px;
font-weight: 500;
}
.result_box .score_text span p{
padding: 0 4px;
font-weight: 600;
}
.result_box .buttons{
display: flex;
margin: 20px 0;
}
.result_box .buttons button{
margin: 0 10px;
height: 45px;
padding: 0 20px;
font-size: 18px;
font-weight: 500;
cursor: pointer;
border: none;
outline: none;
border-radius: 5px;
border: 1px solid #007bff;
transition: all 0.3s ease;
}
.buttons button.restart{
color: #fff;
background: #007bff;
}
.buttons button.restart:hover{
background: #0263ca;
}
.buttons button.quit{
color: #007bff;
background: #fff;
}
.buttons button.quit:hover{
color: #fff;
background: #007bff;
}
Finally, create a JavaScript file called Question.js and paste the provided code into your JavaScript file. Remember, you need to create a file with .js extension. In this file, we store all the queries in an array.
// creating an array and passing the number, questions, options, and answers
let questions = [
{
numb: 1,
question: "What does HTML stand for?",
answer: "Hyper Text Markup Language",
options: [
"Hyper Text Preprocessor",
"Hyper Text Markup Language",
"Hyper Text Multiple Language",
"Hyper Tool Multi Language"
]
},
{
numb: 2,
question: "What does CSS stand for?",
answer: "Cascading Style Sheet",
options: [
"Common Style Sheet",
"Colorful Style Sheet",
"Computer Style Sheet",
"Cascading Style Sheet"
]
},
{
numb: 3,
question: "What does PHP stand for?",
answer: "Hypertext Preprocessor",
options: [
"Hypertext Preprocessor",
"Hypertext Programming",
"Hypertext Preprogramming",
"Hometext Preprocessor"
]
},
{
numb: 4,
question: "What does SQL stand for?",
answer: "Structured Query Language",
options: [
"Stylish Question Language",
"Stylesheet Query Language",
"Statement Question Language",
"Structured Query Language"
]
},
{
numb: 5,
question: "What does XML stand for?",
answer: "eXtensible Markup Language",
options: [
"eXtensible Markup Language",
"eXecutable Multiple Language",
"eXTra Multi-Program Language",
"eXamine Multiple Language"
]
},
// you can uncomment the below codes and make duplicate as more as you want to add question
// but remember you need to give the numb value serialize like 1,2,3,5,6,7,8,9.....
// {
// numb: 6,
// question: "Your Question is Here",
// answer: "Correct answer of the question is here",
// options: [
// "Option 1",
// "option 2",
// "option 3",
// "option 4"
// ]
// },
];
Last, create a JavaScript file with the name of script.js and paste the given codes in your JavaScript file. Remember, you’ve to create a file with .js extension.
//selecting all required elements
const start_btn = document.querySelector(".start_btn button");
const info_box = document.querySelector(".info_box");
const exit_btn = info_box.querySelector(".buttons .quit");
const continue_btn = info_box.querySelector(".buttons .restart");
const quiz_box = document.querySelector(".quiz_box");
const result_box = document.querySelector(".result_box");
const option_list = document.querySelector(".option_list");
const time_line = document.querySelector("header .time_line");
const timeText = document.querySelector(".timer .time_left_txt");
const timeCount = document.querySelector(".timer .timer_sec");
// if startQuiz button clicked
start_btn.onclick = ()=>{
info_box.classList.add("activeInfo"); //show info box
}
// if exitQuiz button clicked
exit_btn.onclick = ()=>{
info_box.classList.remove("activeInfo"); //hide info box
}
// if continueQuiz button clicked
continue_btn.onclick = ()=>{
info_box.classList.remove("activeInfo"); //hide info box
quiz_box.classList.add("activeQuiz"); //show quiz box
showQuetions(0); //calling showQestions function
queCounter(1); //passing 1 parameter to queCounter
startTimer(15); //calling startTimer function
startTimerLine(0); //calling startTimerLine function
}
let timeValue = 15;
let que_count = 0;
let que_numb = 1;
let userScore = 0;
let counter;
let counterLine;
let widthValue = 0;
const restart_quiz = result_box.querySelector(".buttons .restart");
const quit_quiz = result_box.querySelector(".buttons .quit");
// if restartQuiz button clicked
restart_quiz.onclick = ()=>{
quiz_box.classList.add("activeQuiz"); //show quiz box
result_box.classList.remove("activeResult"); //hide result box
timeValue = 15;
que_count = 0;
que_numb = 1;
userScore = 0;
widthValue = 0;
showQuetions(que_count); //calling showQestions function
queCounter(que_numb); //passing que_numb value to queCounter
clearInterval(counter); //clear counter
clearInterval(counterLine); //clear counterLine
startTimer(timeValue); //calling startTimer function
startTimerLine(widthValue); //calling startTimerLine function
timeText.textContent = "Time Left"; //change the text of timeText to Time Left
next_btn.classList.remove("show"); //hide the next button
}
// if quitQuiz button clicked
quit_quiz.onclick = ()=>{
window.location.reload(); //reload the current window
}
const next_btn = document.querySelector("footer .next_btn");
const bottom_ques_counter = document.querySelector("footer .total_que");
// if Next Que button clicked
next_btn.onclick = ()=>{
if(que_count < questions.length - 1){ //if question count is less than total question length
que_count++; //increment the que_count value
que_numb++; //increment the que_numb value
showQuetions(que_count); //calling showQestions function
queCounter(que_numb); //passing que_numb value to queCounter
clearInterval(counter); //clear counter
clearInterval(counterLine); //clear counterLine
startTimer(timeValue); //calling startTimer function
startTimerLine(widthValue); //calling startTimerLine function
timeText.textContent = "Time Left"; //change the timeText to Time Left
next_btn.classList.remove("show"); //hide the next button
}else{
clearInterval(counter); //clear counter
clearInterval(counterLine); //clear counterLine
showResult(); //calling showResult function
}
}
// getting questions and options from array
function showQuetions(index){
const que_text = document.querySelector(".que_text");
//creating a new span and div tag for question and option and passing the value using array index
let que_tag = '<span>'+ questions[index].numb + ". " + questions[index].question +'</span>';
let option_tag = '<div class="option"><span>'+ questions[index].options[0] +'</span></div>'
+ '<div class="option"><span>'+ questions[index].options[1] +'</span></div>'
+ '<div class="option"><span>'+ questions[index].options[2] +'</span></div>'
+ '<div class="option"><span>'+ questions[index].options[3] +'</span></div>';
que_text.innerHTML = que_tag; //adding new span tag inside que_tag
option_list.innerHTML = option_tag; //adding new div tag inside option_tag
const option = option_list.querySelectorAll(".option");
// set onclick attribute to all available options
for(i=0; i < option.length; i++){
option[i].setAttribute("onclick", "optionSelected(this)");
}
}
// creating the new div tags which for icons
let tickIconTag = '<div class="icon tick"><i class="fas fa-check"></i></div>';
let crossIconTag = '<div class="icon cross"><i class="fas fa-times"></i></div>';
//if user clicked on option
function optionSelected(answer){
clearInterval(counter); //clear counter
clearInterval(counterLine); //clear counterLine
let userAns = answer.textContent; //getting user selected option
let correcAns = questions[que_count].answer; //getting correct answer from array
const allOptions = option_list.children.length; //getting all option items
if(userAns == correcAns){ //if user selected option is equal to array's correct answer
userScore += 1; //upgrading score value with 1
answer.classList.add("correct"); //adding green color to correct selected option
answer.insertAdjacentHTML("beforeend", tickIconTag); //adding tick icon to correct selected option
console.log("Correct Answer");
console.log("Your correct answers = " + userScore);
}else{
answer.classList.add("incorrect"); //adding red color to correct selected option
answer.insertAdjacentHTML("beforeend", crossIconTag); //adding cross icon to correct selected option
console.log("Wrong Answer");
for(i=0; i < allOptions; i++){
if(option_list.children[i].textContent == correcAns){ //if there is an option which is matched to an array answer
option_list.children[i].setAttribute("class", "option correct"); //adding green color to matched option
option_list.children[i].insertAdjacentHTML("beforeend", tickIconTag); //adding tick icon to matched option
console.log("Auto selected correct answer.");
}
}
}
for(i=0; i < allOptions; i++){
option_list.children[i].classList.add("disabled"); //once user select an option then disabled all options
}
next_btn.classList.add("show"); //show the next button if user selected any option
}
function showResult(){
info_box.classList.remove("activeInfo"); //hide info box
quiz_box.classList.remove("activeQuiz"); //hide quiz box
result_box.classList.add("activeResult"); //show result box
const scoreText = result_box.querySelector(".score_text");
if (userScore > 3){ // if user scored more than 3
//creating a new span tag and passing the user score number and total question number
let scoreTag = '<span>and congrats! , You got <p>'+ userScore +'</p> out of <p>'+ questions.length +'</p></span>';
scoreText.innerHTML = scoreTag; //adding new span tag inside score_Text
}
else if(userScore > 1){ // if user scored more than 1
let scoreTag = '<span>and nice , You got <p>'+ userScore +'</p> out of <p>'+ questions.length +'</p></span>';
scoreText.innerHTML = scoreTag;
}
else{ // if user scored less than 1
let scoreTag = '<span>and sorry , You got only <p>'+ userScore +'</p> out of <p>'+ questions.length +'</p></span>';
scoreText.innerHTML = scoreTag;
}
}
function startTimer(time){
counter = setInterval(timer, 1000);
function timer(){
timeCount.textContent = time; //changing the value of timeCount with time value
time--; //decrement the time value
if(time < 9){ //if timer is less than 9
let addZero = timeCount.textContent;
timeCount.textContent = "0" + addZero; //add a 0 before time value
}
if(time < 0){ //if timer is less than 0
clearInterval(counter); //clear counter
timeText.textContent = "Time Off"; //change the time text to time off
const allOptions = option_list.children.length; //getting all option items
let correcAns = questions[que_count].answer; //getting correct answer from array
for(i=0; i < allOptions; i++){
if(option_list.children[i].textContent == correcAns){ //if there is an option which is matched to an array answer
option_list.children[i].setAttribute("class", "option correct"); //adding green color to matched option
option_list.children[i].insertAdjacentHTML("beforeend", tickIconTag); //adding tick icon to matched option
console.log("Time Off: Auto selected correct answer.");
}
}
for(i=0; i < allOptions; i++){
option_list.children[i].classList.add("disabled"); //once user select an option then disabled all options
}
next_btn.classList.add("show"); //show the next button if user selected any option
}
}
}
function startTimerLine(time){
counterLine = setInterval(timer, 29);
function timer(){
time += 1; //upgrading time value with 1
time_line.style.width = time + "px"; //increasing width of time_line with px by time value
if(time > 549){ //if time value is greater than 549
clearInterval(counterLine); //clear counterLine
}
}
}
function queCounter(index){
//creating a new span tag and passing the question number and total question
let totalQueCounTag = '<span><p>'+ index +'</p> of <p>'+ questions.length +'</p> Questions</span>';
bottom_ques_counter.innerHTML = totalQueCounTag; //adding new span tag inside bottom_ques_counter
}
That 's all, now you' ve successfully succumbed to a crunch a quiz up with timer also using killing sis & javascript.
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