WD-FT-July 25 Alejandro Duque Javascript-quiz-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

@@ -1,174 +1,228 @@
 document.addEventListener("DOMContentLoaded", () => {
-  /************  HTML ELEMENTS  ************/
-  // View divs
-  const quizView = document.querySelector("#quizView");
-  const endView = document.querySelector("#endView");
-
-  // Quiz view elements
-  const progressBar = document.querySelector("#progressBar");
-  const questionCount = document.querySelector("#questionCount");
-  const questionContainer = document.querySelector("#question");
-  const choiceContainer = document.querySelector("#choices");
-  const nextButton = document.querySelector("#nextButton");
-
-  // 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),
-    // Add more questions here
-  ];
-  const quizDuration = 120; // 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 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();
-
-
-  /************  TIMER  ************/
-
-  let timer;
-
-
-  /************  EVENT LISTENERS  ************/
+    /************  HTML ELEMENTS  ************/
+    // View divs
+    const quizView = document.querySelector("#quizView");
+    const endView = document.querySelector("#endView");
+
+    // Quiz view elements
+    const progressBar = document.querySelector("#progressBar");
+    const questionCount = document.querySelector("#questionCount");
+    const questionContainer = document.querySelector("#question");
+    const choiceContainer = document.querySelector("#choices");
+    const nextButton = document.querySelector("#nextButton");
+
+    // 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 the term for a group of flamingos?", ["A flock", "A flamboyance", "A colony", "A parade"], "A flamboyance", 2),
+        new Question("What is the only fruit that has its seeds on the outside?", ["Strawberry", "Apple", "Banana", "Cherry"], "Strawberry", 1),
+        new Question("What color is the Black Panther?", ["Black", "White", "Pink", "Blue"], "Black", 1),
+        new Question("What’s heavier: 1 kilogram of feathers or 1 kilogram of bricks?", ["Feathers", "Bricks", "They weigh the same", "Depends on the size"], "They weigh the same", 1),
+        new Question("I’m so fragile that if you say my name, you’ll break me. What am I?", ["Glass", "Silence", "Me", "A word"], "Silence", 1),
+        new Question("What two words, when combined, hold the most letters?", ["Post Office", "Post pre", "My Office", "Nothing"], "Post Office", 1),
+        new Question("What word is spelled incorrectly in every single dictionary?", ["Incorrectly", "None", "Almost none", "Every word"], "Incorrectly", 1),
+        new Question("What's the meaning of the word 'Guarrito' in Málaga?", ["Small person that doesn't shower", "Normal person that doesn't shower", "A bird", "An electric drill"], "A electric drill", 3),
+        new Question("In binary what is 2 + 2?", ["4", "22", "010", "0100"], "0100", 2),
+        new Question("Which Doctor's companion was the first in saying 'It's smaller on the outside', instead of the classical 'It's bigger on the inside'?", ["Clara Oswald", "Rose Tyler", "That seems sexual, and I don't watch porn?¿?", "Donna Noble"], "Clara Oswald", 2),
+    ];
+    const quizDuration = 20; // 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  ************/
+    function secondsToStrings(timeInseconds) {
+        const minutes = Math.floor(timeInseconds / 60)
+            .toString()
+            .padStart(2, "0");
+        const seconds = (timeInseconds % 60).toString().padStart(2, "0");
+        return `${minutes}:${seconds}`;
+    }
+    // Convert the time remaining in seconds to minutes and seconds, and pad the numbers with zeros if needed
 
-  nextButton.addEventListener("click", nextButtonHandler);
+    // Display the time remaining in the time remaining container
+    const timeRemainingContainer = document.getElementById("timeRemaining");
+    timeRemainingContainer.innerText = secondsToStrings(quiz.timeRemaining);
 
+    // Show first question
+    showQuestion();
 
+    /************  TIMER  ************/
 
-  /************  FUNCTIONS  ************/
+    let timer = setInterval(() => {
+        quiz.timeRemaining--;
+        timeRemainingContainer.innerText = secondsToStrings(quiz.timeRemaining);
+        if (quiz.timeRemaining === 0) {
+            clearInterval(timer);
+            showResults();
+        }
+    }, 1000);
 
-  // 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
+    /************  EVENT LISTENERS  ************/
 
+    nextButton.addEventListener("click", nextButtonHandler);
 
+    /************  FUNCTIONS  ************/
 
-  function showQuestion() {
-    // If the quiz has ended, show the results
-    if (quiz.hasEnded()) {
-      showResults();
-      return;
-    }
+    // 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
 
-    // Clear the previous question text and question choices
-    questionContainer.innerText = "";
-    choiceContainer.innerHTML = "";
+    function showQuestion() {
+        // If the quiz has ended, show the results
+        if (quiz.hasEnded()) {
+            showResults();
+            return;
+        }
 
-    // Get the current question from the quiz by calling the Quiz class method `getQuestion()`
-    const question = quiz.getQuestion();
-    // Shuffle the choices of the current question by calling the method 'shuffleChoices()' on the question object
-    question.shuffleChoices();
-
-
+        // Clear the previous question text and question choices
+        questionContainer.innerText = "";
+        choiceContainer.innerHTML = "";
 
-    // YOUR CODE HERE:
-    //
-    // 1. Show the question
-    // Update the inner text of the question container element and show the question text
+        // Get the current question from the quiz by calling the Quiz class method `getQuestion()`
+        const question = quiz.getQuestion();
+        // Shuffle the choices of the current question by calling the method 'shuffleChoices()' on the question object
+        question.shuffleChoices();
 
-
-    // 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
+        // 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
+        let progressPercentage = (quiz.currentQuestionIndex / quiz.questions.length) * 100;
+        progressBar.style.width = `${progressPercentage}%`; // 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
+        // 3. Update the question count text
+        // Update the question count (div#questionCount) show the current question out of total questions
 
+        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:
-      /* 
+        // 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:
+        /* 
           <input type="radio" name="choice" value="CHOICE TEXT HERE">
           <label>CHOICE TEXT HERE</label>
         <br>
       */
-      // 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.
-
-  }
-
-
-
-  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.
-
-
-    // 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()`.
-  }  
+        // 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.
+
+        // choiceContainer.innerHTML = `
+        // <input type="radio" name="choice" value="ABC">
+        // <label>ABC</label>
+        // <br>
+        // <input type="radio" name="choice" value="123">
+        // <label>123</label>
+        // `;
+
+        question.choices.forEach((eachChoice) => {
+            let inputNode = document.createElement("input");
+            inputNode.type = "radio";
+            inputNode.name = "choice";
+            inputNode.value = eachChoice;
+            let labelNode = document.createElement("label");
+            labelNode.innerText = eachChoice;
+            let brNode = document.createElement("br");
+
+            choiceContainer.append(inputNode, labelNode, brNode);
+        });
+    }
 
+    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.
+
+        let choiceElementsNodeList = document.querySelectorAll("#choices input");
+        // 2. Loop through all the choice elements and check which one is selected
+        choiceElementsNodeList.forEach((eachChoice) => {
+            if (eachChoice.checked) {
+                selectedAnswer = eachChoice.value;
+            }
+        });
+
+        if (selectedAnswer) {
+            quiz.checkAnswer(selectedAnswer);
+            quiz.moveToNextQuestion();
+            showQuestion();
+        }
+
+        // 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()`.
+    }
+    function showEndView() {
+        // 1. Hide the quiz view (div#quizView)
+        quizView.style.display = "none";
 
+        // 2. Show the end view (div#endView)
+        endView.style.display = "flex";
+    }
+    function showQuizView() {
+        endView.style.display = "none";
+        quizView.style.display = "flex";
+    }
 
+    function showResults() {
+        // YOUR CODE HERE:
+        //
+        showEndView();
 
-  function showResults() {
+        clearInterval(timer);
 
-    // YOUR CODE HERE:
-    //
-    // 1. Hide the quiz view (div#quizView)
-    quizView.style.display = "none";
+        // 3. Update the result container (div#result) inner text to show the number of correct answers out of total questions
+        resultContainer.innerText = `You scored ${quiz.correctAnswers} out of ${quiz.questions.length} correct answers!`; // This value is hardcoded as a placeholder
+    }
 
-    // 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
-  }
-
-});
+    const restartBtn = document.querySelector("#restartButton");
+    restartBtn.addEventListener("click", () => {
+        showQuizView();
+        quiz.currentQuestionIndex = 0;
+        quiz.correctAnswers = 0;
+
+        quiz.shuffleQuestions();
+
+        showQuestion();
+
+        quiz.timeRemaining = quiz.timeLimit;
+        timeRemainingContainer.innerText = secondsToStrings(quiz.timeRemaining);
+
+        timer = setInterval(() => {
+            quiz.timeRemaining--;
+            timeRemainingContainer.innerText = secondsToStrings(quiz.timeRemaining);
+            if (quiz.timeRemaining === 0) {
+                clearInterval(timer);
+                showResults();
+            }
+        }, 1000);
+    });
+});