重置进度条值jQuery

时间:2016-06-05 21:03:59

标签: javascript jquery html css

一旦测验结束,我正试图在测验中重置进度条。

如果您按照以下链接进行操作:

  1. 回答问题
  2. Prog bar根据一系列问题上升
  3. 测验到达结束
  4. Prog bar保持在100%
  5. 以下是工作代码http://codepen.io/fun/pen/RRPdbb?editors=1010

    的链接

    增加进度条的部分是

      progress += questions.length * 100 / questions.length / questions.length;
    
      if ($('#progress').val() >= 100) {
        $('#progress').val(0);
      }
      $('#progress').val(progress);
    

    但是这只会增加而不会重置。

    希望你能提供帮助,这是代码。

      var test_status, options, pos = 0,
      question, optA, optB, optC, option_radio, user_guess, correct = 0,
      progress = 0;
    
    var questions = [
      ['What is 4 * 4?', '16', '34', '18', 'A'],
      ['What is 80 / 20?', '49', '4', '3', 'B'],
      ['What is 760 - 160?', '650', '500', '600', 'C'],
      ['What is 330 + 150?', '480', '800', '400', 'A']
    ];
    // Function to get ids
    function _(x) {
      return document.getElementById(x);
    };
    // Function to ask the question
    function askQuestion() {
      // End of quiz
      if (pos >= questions.length) {
        test_status.innerHTML = 'Test Complete. You scored ' + correct + ' out of ' + questions.length;
        options.innerHTML = '<br>' + 'To attempt the quiz again' + '<br><br>' + '<button onclick = "askQuestion()"> Click here</button>';
        pos = 0;
        correct = 0;
        return false;
    
      }
    
      // Get position of question
      question = questions[pos][0];
      // Get positions of options
      optA = questions[pos][1];
      optB = questions[pos][2];
      optC = questions[pos][3];
      // Get test status id
      test_status = _('test_status');
      // Get options id
      options = _('options');
      // Print question stage
      test_status.innerHTML = "<h2> You are on question " + (pos + 1) + " out of " + questions.length + "</h2>";
      // Print current question
      options.innerHTML = "<h3>" + question + "</h3>";
      // Print options for Q
      options.innerHTML += "<input type ='radio' name ='options' value ='A'> " + optA + "<br>";
      options.innerHTML += "<input type ='radio' name ='options' value ='B'> " + optB + "<br>";
      options.innerHTML += "<input type ='radio' name ='options' value ='C'> " + optC + "<br><br>";
      // Add a submit button
      options.innerHTML += "<button onclick ='checkAnswer()'>submit</buton>";
    
    };
    // Check answer 
    function checkAnswer() {
    
      // Get name attr from raio 
      option_radio = document.getElementsByName('options');
      // loop through each radio
      for (var i = 0; i < option_radio.length; i++) {
        // check if option_radio is check
        if (option_radio[i].checked) {
          user_choice = option_radio[i].value;
        }
      }
      // check is correct
      if (user_choice == questions[pos][4]) {
        correct++;
        // increment progress based on questions length
      }
      pos++;
    
      progress += questions.length * 100 / questions.length / questions.length;
    
      if ($('#progress').val() >= 100) {
        $('#progress').val(0);
      }
      $('#progress').val(progress);
    
      askQuestion();
    
    };
    
    askQuestion();
    

2 个答案:

答案 0 :(得分:3)

这是一个逻辑错误。只需在检查之前设置值即可。

  $('#progress').val(progress);
  if ($('#progress').val() >= 100) {
    $('#progress').val(0);
  }

答案 1 :(得分:0)

检查变量progress的值而不是元素的值

 progress += questions.length * 100 / questions.length / questions.length;

  if (progress >= 100) {
    $('#progress').val(0);
  }
  $('#progress').val(progress);