Question

我认为自己的逻辑存在问题。应该发生的是，用户将输入所提出问题的答案。提交问题后，当前文本（第一个问题）将消失，并且数组中的下一个问题将代替第一个问题。

当前，这些问题继续堆积在彼此上，而没有删除前一个问题。每次尝试添加更多代码以删除该元素时，都会给我一个错误。

请帮助！我正在慢慢添加此代码功能，但现在我被此添加/删除文本问题所困扰。

$(function() {
  $("#submit").on("click", askQuestion)

  var questions = [{
      question: "Is the price higher or lower than $40.00?",
      answer: "higher"
    },
    {
      question: "Is the price higher or lower than $100.00?",
      answer: "higher"
    },
    {
      question: "Is the price higher or lower than $50.00?",
      answer: "lower"
    }
  ];

  function askQuestion() {
    if (answer && document.querySelector("#user-answer").value == answer) {
      document.querySelector("#correct").style.display = "block";
      document.querySelector("#sorry").style.display = "none";
      answer = randomQuestion()
    } else {
      document.querySelector("#correct").style.display = "none";
      document.querySelector("#sorry").style.display = "block";

    }
  }

  function randomQuestion() {
    var question = questions[Math.floor(Math.random() * questions.length)];

    document.querySelector("#user-answer").value = "";

    var element = document.createElement("div");
    element.innerHTML = question.question;

    $("#question").append(element.firstChild);

    return question.answer;
  }

  var answer = randomQuestion();
});

<html>
<head>
  <meta charset="UTF-8">
  <title>Game time</title>
</head>
<body>
  <h1>Question and Answer</h1>
  <div>
    <h2 id="question"></h2>
  </div>
  <label for="text">Answer:</label>
  <input id="user-answer" type="text" value="">
  <button id="submit" type="submit">Submit</button>
  <p id="sorry" style="display: none">Sorry...</p>
  <p id="correct" style="display: none">You got it!</p>
  <script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
  <script src="main.js"></script>
</body>
</html>

Answer 1

您应该在更改问题时使用append，而不是对其进行附加。

您可以使用： $("#question").html(element.firstChild);

代替$("#question").append(element.firstChild);

$(function() {

  $("#submit").on("click", askQuestion)

  var questions = [{
      question: "Is the price higher or lower than $40.00?",
      answer: "higher"
    },
    {
      question: "Is the price higher or lower than $100.00?",
      answer: "higher"
    },
    {
      question: "Is the price higher or lower than $50.00?",
      answer: "lower"
    }
  ];

  function askQuestion() {
    if (answer && document.querySelector("#user-answer").value == answer) {
      document.querySelector("#correct").style.display = "block";
      document.querySelector("#sorry").style.display = "none";
      answer = randomQuestion()
    } else {
      document.querySelector("#correct").style.display = "none";
      document.querySelector("#sorry").style.display = "block";

    }
  }


  function randomQuestion() {
    var question = questions[Math.floor(Math.random() * questions.length)];

    document.querySelector("#user-answer").value = "";

    var element = document.createElement("div");
    element.innerHTML = question.question;

    $("#question").html(element.firstChild);

    return question.answer;

  }

  var answer = randomQuestion();

});

<html>

<head>
  <meta charset="UTF-8">
  <title>Game time</title>
</head>

<body>
  <h1>Question and Answer</h1>
  <div>
    <h2 id="question"></h2>
  </div>
  <label for="text">Answer:</label>
  <input id="user-answer" type="text" value="">
  <button id="submit" type="submit">Submit</button>

  <p id="sorry" style="display: none">Sorry...</p>
  <p id="correct" style="display: none">You got it!</p>

  <script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha256-FgpCb/KJQlLNfOu91ta32o/NMZxltwRo8QtmkMRdAu8=" crossorigin="anonymous"></script>
  <script src="main.js"></script>
</body>

</html>

Answer 2

您正在使用append方法。如果要完全覆盖文本，可以使用.text（jQuery）方法或.innerText（Vanilla js）

使用jQuery / JavaScript做出答案后删除文本

2 个答案: