Project done

index.html

@@ -39,7 +39,7 @@ <h1>JavaScript Quiz</h1>
           <div id="result"></div>
         </div>
         <!-- The below 'Restart Quiz' button is commented out because it is not used initially -->
-        <!-- <button id="restartButton" class="button-secondary">Restart Quiz</button> -->
+        <button id="restartButton" class="button-secondary">Restart Quiz</button>
       </div>
     </div>
 

src/index.js

@@ -32,7 +32,7 @@ document.addEventListener("DOMContentLoaded", () => {
     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 = 5; // 120 seconds (2 minutes)
 
 
   /************  QUIZ INSTANCE  ************/
@@ -43,7 +43,7 @@ document.addEventListener("DOMContentLoaded", () => {
   quiz.shuffleQuestions();
 
 
-  /************  SHOW INITIAL CONTENT  ************/
+  /************  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");
@@ -52,30 +52,49 @@ document.addEventListener("DOMContentLoaded", () => {
   // Display the time remaining in the time remaining container
   const timeRemainingContainer = document.getElementById("timeRemaining");
   timeRemainingContainer.innerText = `${minutes}:${seconds}`;
-
-  // Show first question
-  showQuestion();
-
-
+
+  showQuestion()
   /************  TIMER  ************/
-
   let timer;
-
+  function startCountdown() {
+     setInterval(() => {
+      quiz.timeRemaining--;
+      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) {
+          console.log('Time is up!');
+          clearInterval(timer);
+          showResults();
+        }
+     }, 1000 )
+  }
+startCountdown();
+
+function restartQuiz() {
+  const restartButton = document.getElementById('restartButton');
+  restartButton.addEventListener('click', () => {
+    quiz.currentQuestionIndex = 0;
+    quiz.correctAnswers = 0;
+    quiz.shuffleQuestions();
+    quiz.timeRemaining = quizDuration;
+    showQuestion();
+    startCountdown();
+    quizView.style.display = 'block';
+    endView.style.display = 'none';
+  })
+}
+restartQuiz() ;
 
   /************  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()) {
@@ -91,28 +110,22 @@ 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;
 
     // 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
-
-
+    progressBar.style.width = `${(quiz.currentQuestionIndex / quiz.questions.length) * 100}%`; // This value is hardcoded as a placeholder
 
     // 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`.
@@ -128,47 +141,62 @@ document.addEventListener("DOMContentLoaded", () => {
       // 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.
 
+      console.log(question);
+
+      question.choices.forEach((choice) => {
+          const inputEl = document.createElement('input');
+          inputEl.type = 'radio';
+          inputEl.name = 'choice';
+          inputEl.value = choice;
+          const labelEl = document.createElement('label');
+          labelEl.innerText = choice;
+          const newLine = document.createElement('br');
+          choiceContainer.appendChild(inputEl);
+          choiceContainer.appendChild(labelEl);
+          choiceContainer.appendChild(newLine);
+      })
   }
-
-
-
   function nextButtonHandler () {
-    let selectedAnswer; // A variable to store the selected answer value
-
+    let selectedAnswer; 
 
-
-    // YOUR CODE HERE:
-    //
     // 1. Get all the choice elements. You can use the `document.querySelectorAll()` method.
-
+    const choices = document.querySelectorAll('input[type="radio"]');
 
     // 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.
-
-
+
     // 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()`.
-  }  
-
-
 
+      choices.forEach(choice => {
+        if (choice.checked) {
+          selectedAnswer = choice.value; 
+        }
+      });
+      if (!selectedAnswer) {
+        alert('Please select an answer before proceeding.');
+        return;
+      }
+      if (selectedAnswer === quiz.questions[quiz.currentQuestionIndex].answer) {
+        quiz.correctAnswers++; 
+      }
+      quiz.currentQuestionIndex++; 
+      showQuestion();
+  }  
 
   function showResults() {
-
     // YOUR CODE HERE:
-    //
     // 1. Hide the quiz view (div#quizView)
     quizView.style.display = "none";
 
     // 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
   }
-
 });

src/question.js

@@ -1,7 +1,17 @@
 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;
+    }
+
+    shuffleChoices() {
+        for (let i = this.choices.length - 1; i > 0; i--){
+            let j = Math.floor(Math.random() * (i + 1));
+            [this.choices[i], this.choices[j]] = [this.choices[j], this.choices[i]];
+        }
+        return this.shuffleChoices;
+    } 
+}
 
-    // 2. shuffleChoices()
-}

src/quiz.js

@@ -1,15 +1,58 @@
 class Quiz {
-    // 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()
+  getQuestion() {
+    return this.questions[this.currentQuestionIndex];
+  }
 
-    // 4. shuffleQuestions()
+  moveToNextQuestion() {
+    this.currentQuestionIndex++;
+  }
 
-    // 5. checkAnswer(answer)
+  shuffleQuestions() {
+    for (let i = this.questions.length - 1; i > 0; i--) {
+      let j = Math.floor(Math.random() * (i + 1));
+      [this.questions[i], this.questions[j]] = [
+        this.questions[j],
+        this.questions[i],
+      ];
+    }
+    return this.shuffleQuestions;
+  }
 
-    // 6. hasEnded()
-}
+  checkAnswer(answer) {
+    if (answer) {
+      this.correctAnswers++;
+    }
+  }
+  hasEnded() {
+    if (this.currentQuestionIndex < this.questions.length) {
+      return false;
+    } else if (this.currentQuestionIndex === this.questions.length) {
+      return true;
+    }
+  }
+  filterQuestionsByDifficulty(difficulty) {
+    if (typeof difficulty !== "number" || difficulty < 1 || difficulty > 3) {
+      return;
+    }
+    this.questions = this.questions.filter(
+      (question) => question.difficulty === difficulty
+    );
+  }
+  averageDifficulty() {
+    if (this.questions.length === 0) 
+      return 0;
+    const totalDifficulty = this.questions.reduce(
+      (sum, question) => sum + question.difficulty,
+      0
+    );
+    return totalDifficulty / this.questions.length;
+  }
+}