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JSQuiz.html
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<!DOCTYPE html>
<html lang="en">
<head>
<!-- ad sense tag-->
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-1733919132650092"
crossorigin="anonymous"></script>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-FBJL1SB5QM"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag() { dataLayer.push(arguments); }
gtag('js', new Date());
gtag('config', 'G-FBJL1SB5QM');
</script>
<title>JavaScript QUIZ - Test Your Coding Knowledge | CodingNation</title>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="title" content="Coding-nation">
<meta name="description"
content="CodingNation is a comprehensive code tutorial website, providing beginner to advanced coding tutorials, coding exercises, and coding challenges to help you learn to code and build your skills.">
<meta name="keywords"
content="Coding-nation, CodeNation, HTML tutorials, python tutorials, css tutorials, c tutorials,React js tutorials, javascript tutorials,java tutorials, php tutorials, code editor, online code editor, Codebot,chatbot,quizzes">
<meta name="robots" content="index, follow">
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<link rel="stylesheet" href="../Styles/Quiz.css" />
<link rel="icon" type="image/png" sizes="32x32" href="../images/favicon.png">
<!-- Latest compiled and minified CSS -->
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<!-- Latest compiled JavaScript -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
<link href='https://unpkg.com/boxicons@2.1.4/css/boxicons.min.css' rel='stylesheet'>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.3/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.7.2/font/bootstrap-icons.css" rel="stylesheet">
</head>
<body onload="NextQuestion(0)">
<div class="chatbot-icon">
<a href="../codebot.html"><i class='bx bx-bot'></i></i>
</a>
</div>
<!--navigation bar-->
<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
<div class="container-fluid">
<a class="navbar-brand" href="../index.html">CodingNation</a>
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aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
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</button>
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<a class="nav-link" href="../index.html">Home</a>
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aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">Courses</a>
<ul class="dropdown-menu">
<li>
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<a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown">Practice</a>
<ul class="dropdown-menu">
<li>
<a class="dropdown-item" href="../HTMLQuiz.html" target="_blank">HTML Quiz</a>
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data-bs-toggle="dropdown">Exercises</a>
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<a class="nav-link" href="../About.html">About</a>
</li>
</ul>
</div>
</div>
</nav>
<main>
<!-- creating a modal for when quiz ends -->
<div class="modal-container" id="score-modal">
<div class="modal-content-container">
<h1>Congratulations, Quiz Completed.</h1>
<div class="grade-details">
<p style="font-size: 16px">Result :</p>
<p>Wrong Answers : <span id="wrong-answers"></span></p>
<p>Right Answers : <span id="right-answers"></span></p>
<p>Grade : <span id="grade-percentage"></span>%</p>
<p><span id="remarks"></span></p>
</div>
<div class="modal-button-container">
<button onclick="closeScoreModal()">Continue</button>
</div>
</div>
</div>
<!-- end of modal of quiz details-->
<div class="game-quiz-container">
<div class="game-details-container">
<h1>Score : <span id="player-score"></span> / 20</h1>
<h1>Question : <span id="question-number"></span> / 20</h1>
</div>
<div class="game-question-container">
<h1 id="display-question"></h1>
</div>
<div class="game-options-container">
<div class="modal-container" id="option-modal">
<div class="modal-content-container">
<h1>Please Pick An Option</h1>
<div class="modal-button-container">
<button onclick="closeOptionModal()">Continue</button>
</div>
</div>
</div>
<span>
<input type="radio" id="option-one" name="option" class="radio" value="optionA" />
<label for="option-one" class="option" id="option-one-label"></label>
</span>
<span>
<input type="radio" id="option-two" name="option" class="radio" value="optionB" />
<label for="option-two" class="option" id="option-two-label"></label>
</span>
<span>
<input type="radio" id="option-three" name="option" class="radio" value="optionC" />
<label for="option-three" class="option" id="option-three-label"></label>
</span>
<span>
<input type="radio" id="option-four" name="option" class="radio" value="optionD" />
<label for="option-four" class="option" id="option-four-label"></label>
</span>
</div>
<div class="next-button-container">
<button onclick="handleNextQuestion()">Next Question</button>
</div>
</div>
</main>
<script>
//this would be the object shape for storing the questions
//you can change the questions to your own taste or even add more questions..
const questions = [
{
question: "What does JavaScript stand for?",
optionA: "JavaServer Pages",
optionB: "JavaServer Programming Language",
optionC: "Java Script",
optionD: "JavaScript is not an acronym",
correctOption: "optionD",
},
{
question:
"Which keyword is used to declare a variable in JavaScript?",
optionA: "var",
optionB: "variable",
optionC: "let",
optionD: "const",
correctOption: "optionA",
},
{
question:
"What is the result of the following expression: 10 + 5 * 2?",
optionA: "30",
optionB: "20",
optionC: "15",
optionD: "25",
correctOption: "optionD",
},
{
question:
"What is the syntax for a single-line comment in JavaScript?",
optionA: "// This is a comment",
optionB: "<!-- This is a comment -->",
optionC: "* This is a comment",
optionD: "/* This is a comment */",
correctOption: "optionA",
},
{
question:
"What is the syntax for a multi-line comment in JavaScript?",
optionA: "// This is a comment",
optionB: "<!-- This is a comment -->",
optionC: "* This is a comment",
optionD: "/* This is a comment */",
correctOption: "optionD",
},
{
question:
"Which of the following is not a valid way to declare a variable in JavaScript?",
optionA: "var x = 5;",
optionB: "let y = 'hello';",
optionC: "const z = [1, 2, 3];",
optionD: "boolean a = true;",
correctOption: "optionD",
},
{
question:
"What is the output of the following code: console.log('5' == 5)?",
optionA: "true",
optionB: "false",
optionC: "NaN",
optionD: "undefined",
correctOption: "optionA",
},
{
question:
"What is the output of the following code: console.log('5' === 5)?",
optionA: "true",
optionB: "false",
optionC: "NaN",
optionD: "undefined",
correctOption: "optionB",
},
{
question:
"What is the output of the following code: console.log(1/0)?",
optionA: "NaN",
optionB: "Infinity",
optionC: "-Infinity",
optionD: "undefined",
correctOption: "optionB",
},
{
question:
"What is the output of the following code: console.log('Hello' + 'World')?",
optionA: "'HelloWorld'",
optionB: "'Hello World'",
optionC: "'WorldHello'",
optionD: "'Hello' 'World'",
correctOption: "optionA",
},
{
question:
"What is the output of the following code: console.log(typeof null)?",
optionA: "null",
optionB: "object",
optionC: "undefined",
optionD: "number",
correctOption: "optionB",
},
{
question:
"Which built-in method returns the index of the first occurrence of a specified value in a string?",
optionA: "indexOf()",
optionB: "search()",
optionC: "findIndex()",
optionD: "startsWith()",
correctOption: "optionA",
},
{
question:
"What is the output of the following code? console.log(typeof [])",
optionA: "undefined",
optionB: "null",
optionC: "string",
optionD: "object",
correctOption: "optionD",
},
{
question:
"What is the difference between `==` and `===` in JavaScript?",
optionA: "`==` performs a type conversion, while `===` does not",
optionB: "`===` performs a type conversion, while `==` does not",
optionC: "`==` and `===` are the same",
optionD: "none of the above",
correctOption: "optionA",
},
{
question:
"Which of the following is not a JavaScript loop statement?",
optionA: "for",
optionB: "while",
optionC: "do-while",
optionD: "switch",
correctOption: "optionD",
},
{
question:
"Which of the following is a primitive data type in JavaScript?",
optionA: "array",
optionB: "object",
optionC: "boolean",
optionD: "function",
correctOption: "optionC",
},
{
question: "What is the purpose of the `let` keyword in JavaScript?",
optionA: "to declare a block-scoped variable",
optionB: "to declare a global variable",
optionC: "to declare a function",
optionD: "none of the above",
correctOption: "optionA",
},
{
question: "What does the `this` keyword refer to in JavaScript?",
optionA: "the current file",
optionB: "the global object",
optionC: "the parent object",
optionD: "the current object",
correctOption: "optionD",
},
{
question:
"Which of the following is not a valid way to declare a function in JavaScript?",
optionA: "function myFunction() {}",
optionB: "let myFunction = function() {}",
optionC: "myFunction = function() {}",
optionD: "myFunction() {}",
correctOption: "optionD",
},
{
question:
"What is the difference between `var`, `let`, and `const` in JavaScript?",
optionA:
"`var` has function scope, while `let` and `const` have block scope",
optionB:
"`var` has block scope, while `let` and `const` have function scope",
optionC: "`let` and `const` are immutable, while `var` is mutable",
optionD: "there is no difference",
correctOption: "optionA",
},
];
let shuffledQuestions = []; //empty array to hold shuffled selected questions out of all available questions
function handleQuestions() {
//function to shuffle and push 10 questions to shuffledQuestions array
//app would be dealing with 10questions per session
while (shuffledQuestions.length <= 19) {
const random =
questions[Math.floor(Math.random() * questions.length)];
if (!shuffledQuestions.includes(random)) {
shuffledQuestions.push(random);
}
}
}
let questionNumber = 1; //holds the current question number
let playerScore = 0; //holds the player score
let wrongAttempt = 0; //amount of wrong answers picked by player
let indexNumber = 0; //will be used in displaying next question
// function for displaying next question in the array to dom
//also handles displaying players and quiz information to dom
function NextQuestion(index) {
handleQuestions();
const currentQuestion = shuffledQuestions[index];
document.getElementById("question-number").innerHTML = questionNumber;
document.getElementById("player-score").innerHTML = playerScore;
document.getElementById("display-question").innerHTML =
currentQuestion.question;
document.getElementById("option-one-label").innerHTML =
currentQuestion.optionA;
document.getElementById("option-two-label").innerHTML =
currentQuestion.optionB;
document.getElementById("option-three-label").innerHTML =
currentQuestion.optionC;
document.getElementById("option-four-label").innerHTML =
currentQuestion.optionD;
}
function checkForAnswer() {
const currentQuestion = shuffledQuestions[indexNumber]; //gets current Question
const currentQuestionAnswer = currentQuestion.correctOption; //gets current Question's answer
const options = document.getElementsByName("option"); //gets all elements in dom with name of 'option' (in this the radio inputs)
let correctOption = null;
options.forEach((option) => {
if (option.value === currentQuestionAnswer) {
//get's correct's radio input with correct answer
correctOption = option.labels[0].id;
}
});
//checking to make sure a radio input has been checked or an option being chosen
if (
options[0].checked === false &&
options[1].checked === false &&
options[2].checked === false &&
options[3].checked == false
) {
document.getElementById("option-modal").style.display = "flex";
}
//checking if checked radio button is same as answer
options.forEach((option) => {
if (
option.checked === true &&
option.value === currentQuestionAnswer
) {
document.getElementById(correctOption).style.backgroundColor =
"green";
playerScore++; //adding to player's score
indexNumber++; //adding 1 to index so has to display next question..
//set to delay question number till when next question loads
setTimeout(() => {
questionNumber++;
}, 1000);
} else if (option.checked && option.value !== currentQuestionAnswer) {
const wrongLabelId = option.labels[0].id;
document.getElementById(wrongLabelId).style.backgroundColor = "red";
document.getElementById(correctOption).style.backgroundColor =
"green";
wrongAttempt++; //adds 1 to wrong attempts
indexNumber++;
//set to delay question number till when next question loads
setTimeout(() => {
questionNumber++;
}, 1000);
}
});
}
//called when the next button is called
function handleNextQuestion() {
checkForAnswer(); //check if player picked right or wrong option
unCheckRadioButtons();
//delays next question displaying for a second just for some effects so questions don't rush in on player
setTimeout(() => {
if (indexNumber <= 19) {
//displays next question as long as index number isn't greater than 9, remember index number starts from 0, so index 9 is question 10
NextQuestion(indexNumber);
} else {
handleEndGame(); //ends game if index number greater than 9 meaning we're already at the 10th question
}
resetOptionBackground();
}, 1000);
}
//sets options background back to null after display the right/wrong colors
function resetOptionBackground() {
const options = document.getElementsByName("option");
options.forEach((option) => {
document.getElementById(option.labels[0].id).style.backgroundColor =
"";
});
}
// unchecking all radio buttons for next question(can be done with map or foreach loop also)
function unCheckRadioButtons() {
const options = document.getElementsByName("option");
for (let i = 0; i < options.length; i++) {
options[i].checked = false;
}
}
// function for when all questions being answered
function handleEndGame() {
let remark = null;
let remarkColor = null;
// condition check for player remark and remark color
if (playerScore <= 3) {
remark =
"Bad Grades, Keep Practicing the HTML <a href='https://www.coding-nation.com/jascri.html'>Click Here</a>.";
remarkColor = "red";
} else if (playerScore >= 8 && playerScore < 14) {
remark =
"Below Average Grades, Keep Practicing the HTML <a href='https://www.coding-nation.com/jascri.html'>Click Here</a>..";
remarkColor = "orange";
} else if (playerScore >= 14 && playerScore < 17) {
remark =
"Average Grades, Keep Practicing the HTML<a href='https://www.coding-nation.com/jascri.html'>Click Here</a>..";
remarkColor = "orange";
} else if (playerScore >= 17) {
remark = "Excellent, Keep on Going!.";
remarkColor = "green";
}
const playerGrade = (playerScore / 20) * 100;
//data to display to score board
document.getElementById("remarks").innerHTML = remark;
document.getElementById("remarks").style.color = remarkColor;
document.getElementById("grade-percentage").innerHTML = playerGrade;
document.getElementById("wrong-answers").innerHTML = wrongAttempt;
document.getElementById("right-answers").innerHTML = playerScore;
document.getElementById("score-modal").style.display = "flex";
}
//closes score modal, resets game and reshuffles questions
function closeScoreModal() {
questionNumber = 1;
playerScore = 0;
wrongAttempt = 0;
indexNumber = 0;
shuffledQuestions = [];
NextQuestion(indexNumber);
document.getElementById("score-modal").style.display = "none";
}
//function to close warning modal
function closeOptionModal() {
document.getElementById("option-modal").style.display = "none";
}
</script>
</body>
</html>