diff --git a/index.html b/index.html index 534cd886..6272b587 100644 --- a/index.html +++ b/index.html @@ -23,12 +23,13 @@

JavaScript Quiz

+
Remaining Time: 00:00
- + - - - \ No newline at end of file + diff --git a/src/index.js b/src/index.js index 03737ba3..3162a2e4 100644 --- a/src/index.js +++ b/src/index.js @@ -14,68 +14,92 @@ document.addEventListener("DOMContentLoaded", () => { // End view elements const resultContainer = document.querySelector("#result"); - /************ SET VISIBILITY OF VIEWS ************/ // Show the quiz view (div#quizView) and hide the end view (div#endView) quizView.style.display = "block"; endView.style.display = "none"; - /************ QUIZ DATA ************/ - + // Array with the quiz questions const questions = [ new Question("What is 2 + 2?", ["3", "4", "5", "6"], "4", 1), - new Question("What is the capital of France?", ["Miami", "Paris", "Oslo", "Rome"], "Paris", 1), - new Question("Who created JavaScript?", ["Plato", "Brendan Eich", "Lea Verou", "Bill Gates"], "Brendan Eich", 2), - new Question("What is the mass–energy equivalence equation?", ["E = mc^2", "E = m*c^2", "E = m*c^3", "E = m*c"], "E = mc^2", 3), + new Question( + "What is the capital of France?", + ["Miami", "Paris", "Oslo", "Rome"], + "Paris", + 1 + ), + new Question( + "Who created JavaScript?", + ["Plato", "Brendan Eich", "Lea Verou", "Bill Gates"], + "Brendan Eich", + 2 + ), + new Question( + "What is the mass–energy equivalence equation?", + ["E = mc^2", "E = m*c^2", "E = m*c^3", "E = m*c"], + "E = mc^2", + 3 + ), // Add more questions here ]; - const quizDuration = 120; // 120 seconds (2 minutes) - + const quizDuration = 60; // 120 seconds (2 minutes) /************ QUIZ INSTANCE ************/ - + // Create a new Quiz instance object const quiz = new Quiz(questions, quizDuration, quizDuration); // Shuffle the quiz questions quiz.shuffleQuestions(); - /************ SHOW INITIAL CONTENT ************/ // Convert the time remaining in seconds to minutes and seconds, and pad the numbers with zeros if needed - const minutes = Math.floor(quiz.timeRemaining / 60).toString().padStart(2, "0"); + const minutes = Math.floor(quiz.timeRemaining / 60) + .toString() + .padStart(2, "0"); const seconds = (quiz.timeRemaining % 60).toString().padStart(2, "0"); // Display the time remaining in the time remaining container const timeRemainingContainer = document.getElementById("timeRemaining"); + timeRemainingContainer.innerText = `${minutes}:${seconds}`; // Show first question showQuestion(); - + showTime(); /************ TIMER ************/ - - let timer; - - + function showTime() { + let timer = setInterval(() => { + const minutes = Math.floor(quiz.timeRemaining / 60) + .toString() + .padStart(2, "0"); + const seconds = (quiz.timeRemaining % 60).toString().padStart(2, "0"); + timeRemainingContainer.innerText = `${minutes}:${seconds}`; + if (quiz.timeRemaining <= 0) { + setTimeout(() => { + showResults(); + }, 2000); + timeRemainingContainer.innerText = "Time's up!"; + + clearInterval(timer); + } + quiz.timeRemaining--; + }, 1000); + } /************ EVENT LISTENERS ************/ nextButton.addEventListener("click", nextButtonHandler); - - /************ FUNCTIONS ************/ // showQuestion() - Displays the current question and its choices // nextButtonHandler() - Handles the click on the next button // showResults() - Displays the end view and the quiz results - - function showQuestion() { // If the quiz has ended, show the results if (quiz.hasEnded()) { @@ -91,74 +115,83 @@ document.addEventListener("DOMContentLoaded", () => { const question = quiz.getQuestion(); // Shuffle the choices of the current question by calling the method 'shuffleChoices()' on the question object question.shuffleChoices(); - - // YOUR CODE HERE: // // 1. Show the question // Update the inner text of the question container element and show the question text + questionContainer.innerText = question.text; + const choices = question.choices; - // 2. Update the green progress bar // Update the green progress bar (div#progressBar) width so that it shows the percentage of questions answered - - progressBar.style.width = `65%`; // This value is hardcoded as a placeholder - + const percentageCompleted = + ((quiz.currentQuestionIndex + 1) * 100) / quiz.questions.length; + progressBar.style.width = percentageCompleted + "%"; // This value is hardcoded as a placeholder - - // 3. Update the question count text + // 3. Update the question count text // Update the question count (div#questionCount) show the current question out of total questions - - questionCount.innerText = `Question 1 of 10`; // This value is hardcoded as a placeholder + questionCount.innerText = `Question ${quiz.currentQuestionIndex + 1} of ${ + quiz.questions.length + }`; // This value is hardcoded as a placeholder - // 4. Create and display new radio input element with a label for each choice. // Loop through the current question `choices`. - // For each choice create a new radio input with a label, and append it to the choice container. - // Each choice should be displayed as a radio input element with a label: - /* + // For each choice create a new radio input with a label, and append it to the choice container. + // Each choice should be displayed as a radio input element with a label: + /*
*/ - // Hint 1: You can use the `document.createElement()` method to create a new element. - // Hint 2: You can use the `element.type`, `element.name`, and `element.value` properties to set the type, name, and value of an element. - // Hint 3: You can use the `element.appendChild()` method to append an element to the choices container. - // Hint 4: You can use the `element.innerText` property to set the inner text of an element. - + // Hint 1: You can use the `document.createElement()` method to create a new element. + // Hint 2: You can use the `element.type`, `element.name`, and `element.value` properties to set the type, name, and value of an element. + // Hint 3: You can use the `element.appendChild()` method to append an element to the choices container. + // Hint 4: You can use the `element.innerText` property to set the inner text of an element. + + choices.forEach((choiceValue) => { + let inputTag = document.createElement("input"); + inputTag.setAttribute("type", "radio"); + inputTag.setAttribute("name", "choice"); + inputTag.setAttribute("value", choiceValue); + let label = document.createElement("label"); + label.innerText = choiceValue; + choiceContainer.appendChild(inputTag); + choiceContainer.appendChild(label); + choiceContainer.appendChild(document.createElement("br")); + }); } - - - function nextButtonHandler () { + function nextButtonHandler() { let selectedAnswer; // A variable to store the selected answer value - - // YOUR CODE HERE: // // 1. Get all the choice elements. You can use the `document.querySelectorAll()` method. - // 2. Loop through all the choice elements and check which one is selected - // Hint: Radio input elements have a property `.checked` (e.g., `element.checked`). - // When a radio input gets selected the `.checked` property will be set to true. - // You can use check which choice was selected by checking if the `.checked` property is true. + // Hint: Radio input elements have a property `.checked` (e.g., `element.checked`). + // When a radio input gets selected the `.checked` property will be set to true. + // You can use check which choice was selected by checking if the `.checked` property is true. - // 3. If an answer is selected (`selectedAnswer`), check if it is correct and move to the next question - // Check if selected answer is correct by calling the quiz method `checkAnswer()` with the selected answer. - // Move to the next question by calling the quiz method `moveToNextQuestion()`. - // Show the next question by calling the function `showQuestion()`. - } - - - + // Check if selected answer is correct by calling the quiz method `checkAnswer()` with the selected answer. + // Move to the next question by calling the quiz method `moveToNextQuestion()`. + // Show the next question by calling the function `showQuestion()`. + const choices = document.querySelectorAll("input"); + choices.forEach((choice) => { + if (choice.checked === true) { + selectedAnswer = choice.value; + } + }); + + quiz.checkAnswer(selectedAnswer); + quiz.moveToNextQuestion(); + showQuestion(); + } function showResults() { - // YOUR CODE HERE: // // 1. Hide the quiz view (div#quizView) @@ -166,9 +199,20 @@ document.addEventListener("DOMContentLoaded", () => { // 2. Show the end view (div#endView) endView.style.display = "flex"; - + // 3. Update the result container (div#result) inner text to show the number of correct answers out of total questions - resultContainer.innerText = `You scored 1 out of 1 correct answers!`; // This value is hardcoded as a placeholder + resultContainer.innerText = `You scored ${quiz.correctAnswers} out of ${quiz.questions.length} correct answers!`; // This value is hardcoded as a placeholder + + let restartBtn = document.querySelector("#restartButton"); + restartBtn.addEventListener("click", () => { + endView.style.display = "none"; + quizView.style.display = "flex"; + quiz.currentQuestionIndex = 0; + quiz.correctAnswers = 0; + quiz.shuffleQuestions(); + showQuestion(); + quiz.timeRemaining = 120; + showTime(); + }); } - -}); \ No newline at end of file +}); diff --git a/src/question.js b/src/question.js index 68f6631a..f6b67e86 100644 --- a/src/question.js +++ b/src/question.js @@ -1,7 +1,16 @@ class Question { - // YOUR CODE HERE: - // - // 1. constructor (text, choices, answer, difficulty) + constructor(text, choices, answer, difficulty) { + this.text = text; + this.choices = choices; + this.answer = answer; + this.difficulty = difficulty; + } - // 2. shuffleChoices() -} \ No newline at end of file + shuffleChoices() { + for (let i = this.choices.length - 1; i > 0; i--) { + const j = Math.floor(Math.random() * (i + 1)); + + [this.choices[i], this.choices[j]] = [this.choices[j], this.choices[i]]; + } + } +} diff --git a/src/quiz.js b/src/quiz.js index d94cfd14..5b2bfd9a 100644 --- a/src/quiz.js +++ b/src/quiz.js @@ -1,15 +1,70 @@ class Quiz { - // YOUR CODE HERE: - // - // 1. constructor (questions, timeLimit, timeRemaining) + // YOUR CODE HERE: + // + // 1. constructor (questions, timeLimit, timeRemaining) + constructor(questions, timeLimit, timeRemaining) { + this.questions = questions; + this.timeLimit = timeLimit; + this.timeRemaining = timeRemaining; + this.correctAnswers = 0; + this.currentQuestionIndex = 0; + } - // 2. getQuestion() - - // 3. moveToNextQuestion() + // 2. getQuestion() + getQuestion() { + return this.questions[this.currentQuestionIndex]; + } - // 4. shuffleQuestions() + // 3. moveToNextQuestion() + moveToNextQuestion() { + this.currentQuestionIndex++; + } - // 5. checkAnswer(answer) + // 4. shuffleQuestions() + shuffleQuestions() { + for (let i = this.questions.length - 1; i > 0; i--) { + const j = Math.floor(Math.random() * (i + 1)); + [this.questions[i], this.questions[j]] = [ + this.questions[j], + this.questions[i], + ]; + } + } - // 6. hasEnded() -} \ No newline at end of file + // 5. checkAnswer(answer) + checkAnswer(answer) { + const currentQuestionAnswer = + this.questions[this.currentQuestionIndex].answer; + if (currentQuestionAnswer === answer) { + this.correctAnswers++; + return true; + } + return false; + } + + // 6. hasEnded() + hasEnded() { + if (this.currentQuestionIndex < this.questions.length) { + return false; + } + if ((this.currentQuestionIndex = this.questions.length)) { + return true; + } + } + + filterQuestionsByDifficulty(difficulty) { + if (difficulty >= 1 && difficulty <= 3) { + this.questions = this.questions.filter( + (question) => question.difficulty === difficulty + ); + } + } + + averageDifficulty() { + let sumOfDifficulty = this.questions.reduce((accumulator, question) => { + return accumulator + question.difficulty; + }, 0); + let averageOfDifficulty = sumOfDifficulty / this.questions.length; + return averageOfDifficulty; + } +}