js实现点击上一题和下一题出现对应的题目,

最新推荐文章于 2022-11-23 14:40:58 发布

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最新推荐文章于 2022-11-23 14:40:58 发布

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分类专栏： JS素材文章标签： JS 试题

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本文介绍了一个基于HTML、CSS和JavaScript构建的在线测验系统，该系统采用动态加载页面技术，实现了测验题目和答案的选择、提交及结果展示功能。测验包含多个选择题，涉及中国菜系、茶叶分类等知识领域，用户可以通过前后翻页和提交按钮进行操作。

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<!DOCTYPE html>
<html>

   <head>
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=0">
       <title>测验表2</title>
       <style type="text/css">
           @import url(https://fonts.googleapis.com/css?family=Work+Sans:300,600);
           body {
               font-size: 20px;
               font-family: 'Work Sans', sans-serif;
               color: #333;
               font-weight: 300;
               text-align: center;
               background-color: #f8f6f0;
           }

           h1 {
               font-weight: 300;
               margin: 0px;
               padding: 10px;
               font-size: 16px;
               background-color: #444;
               color: #fff;
           }

           .question {
               font-size: 30px;
               margin-bottom: 10px;
           }

           .answers {
               margin-bottom: 20px;
               text-align: left;
               display: inline-block;
           }

           .answers label {
               display: block;
               margin-bottom: 10px;
           }

           button {
               font-family: 'Work Sans', sans-serif;
               font-size: 16px;
               background-color: #279;
               color: #fff;
               border: 0px;
               border-radius: 3px;
               padding: 10px;
               cursor: pointer;
               margin-bottom: 20px;
               margin-top: 20px;
           }

           button:hover {
               background-color: #38a;
           }

           .slide {
               position: absolute;
               left: 0px;
               top: 0px;
               width: 100%;
               z-index: 1;
               opacity: 0;
               transition: opacity 0.5s;
           }

           .active-slide {
               opacity: 1;
               z-index: 2;
           }

           .quiz-container {
               position: relative;
               height: 200px;
               margin-top: 40px;
           }
       </style>
   </head>

   <body>
       <h1>测试表</h1>
       <div class="quiz-container" style="margin-bottom: 100px;">
           <div id="quiz"></div>
       </div>
       <button id="previous">前一题</button>
       <button id="next">下一题</button>
       <button id="submit">提交</button>
       <div id="results"></div>
       <script type="text/javascript">
           (function() {
               const myQuestions = [{
                       question: "“大煮干丝”是哪个菜系的代表菜之一( )。",
                       answers: {
                           A: "四川菜系",
                           B: "山东菜系",
                           C: "广东菜系",
                           D: "淮扬菜系"
                       },
                       correctAnswer: "D"
                   },
                   {
                       question: "红茶属于( )茶。",
                       answers: {
                           A: "半发酵",
                           B: "发酵",
                           C: "不发酵",
                           D: "微发酵"
                       },
                       correctAnswer: "A"
                   },
                   {
                       question: "满汉全席起兴于（）。",
                       answers: {
                           A: "清代",
                           B: "唐代",
                           C: "宋代",
                           D: "两汉"
                       },
                       correctAnswer: "A"
                   },
                   {
                       question: "满汉全席起兴于（）。",
                       answers: {
                           A: "清代",
                           B: "清代",
                           C: "清代",
                           D: "两汉"
                       },
                       correctAnswer: "ABC"
                   }
               ];

               function buildQuiz() {
                   // we'll need a place to store the HTML output
                   const output = [];

                   // for each question...
                   myQuestions.forEach((currentQuestion, questionNumber) => {
                       // we'll want to store the list of answer choices
                       const answers = [];

                       // and for each available answer...
                       for(letter in currentQuestion.answers) {
                           // ...add an HTML radio button
                           if(currentQuestion.correctAnswer.length > 1) {
                               answers.push(
                                   `<label>
   <input type="checkbox" name="question${questionNumber}" value="${letter}">
   ${letter} :
   ${currentQuestion.answers[letter]}
   </label>`
                               );
                           } else {
                               answers.push(
                                   `<label>
   <input type="radio" name="question${questionNumber}" value="${letter}">
   ${letter} :
   ${currentQuestion.answers[letter]}
   </label>`
                               );
                           }

}

                       // add this question and its answers to the output
                       output.push(
                           `<div class="slide">
<div class="question"> ${currentQuestion.question} </div>
<div class="answers"> ${answers.join("")} </div>
</div>`
                       );
                   });

                   // finally combine our output list into one string of HTML and put it on the page
                   quizContainer.innerHTML = output.join("");
               }

               function showResults() {
                   // gather answer containers from our quiz
                   const answerContainers = quizContainer.querySelectorAll(".answers");

// keep track of user's answers
let numCorrect = 0;

                   // for each question...
                   myQuestions.forEach((currentQuestion, questionNumber) => {
                       // find selected answer
                       const answerContainer = answerContainers[questionNumber];
                       const selector = `input[name=question${questionNumber}]:checked`;
                       const userAnswer = (answerContainer.querySelector(selector) || {}).value;

                       // if answer is correct
                       if(userAnswer === currentQuestion.correctAnswer) {
                           // add to the number of correct answers
                           numCorrect++;

                           // color the answers green
                           answerContainers[questionNumber].style.color = "lightgreen";
                       } else {
                           // if answer is wrong or blank
                           // color the answers red
                           answerContainers[questionNumber].style.color = "red";
                       }
                   });

                   // show number of correct answers out of total
                   resultsContainer.innerHTML = `你答对了${myQuestions.length}中的${numCorrect}`;
               }

               function showSlide(n) {
                   slides[currentSlide].classList.remove("active-slide");
                   slides[n].classList.add("active-slide");
                   currentSlide = n;

                   if(currentSlide === 0) {
                       previousButton.style.display = "none";
                   } else {
                       previousButton.style.display = "inline-block";
                   }

                   if(currentSlide === slides.length - 1) {
                       nextButton.style.display = "none";
                       submitButton.style.display = "inline-block";
                   } else {
                       nextButton.style.display = "inline-block";
                       submitButton.style.display = "none";
                   }
               }

               function showNextSlide() {
                   showSlide(currentSlide + 1);
               }

               function showPreviousSlide() {
                   showSlide(currentSlide - 1);
               }

               const quizContainer = document.getElementById("quiz");
               const resultsContainer = document.getElementById("results");
               const submitButton = document.getElementById("submit");

// display quiz right away
buildQuiz();

               const previousButton = document.getElementById("previous");
               const nextButton = document.getElementById("next");
               const slides = document.querySelectorAll(".slide");
               let currentSlide = 0;

showSlide(0);

               // on submit, show results
               submitButton.addEventListener("click", showResults);
               previousButton.addEventListener("click", showPreviousSlide);
               nextButton.addEventListener("click", showNextSlide);
           })();
       </script>
   </body>

</html>