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javascript - 第二次单击按钮不起作用（JQuery）

问题描述

我在按钮单击事件上有一个 onClick 函数。
问题是此功能仅对每个按钮有效一次

HTML：

<div id="playerScore">120</div>
            <div class="col-md-12 bg-dark">
               <div class="btn-group d-flex align-content-stretch" role="group" aria-label="Basic example">
                  <button type="button" data-score="5" class="btn scoreBtn btn-secondary">5</button>
                  <button type="button" data-score="6" class="btn scoreBtn btn-secondary">6</button>
                  <button type="button" data-score="7" class="btn scoreBtn btn-secondary">7</button>
                  <button type="button" data-score="8" id="scoreBtn" class="btn scoreBtn btn-secondary">8</button>
               </div>
            </div>
            <div class="col-md-12 bg-dark">
               <div class="btn-group d-flex align-content-stretch" role="group" aria-label="Basic example">
                  <button type="button" data-score="9" class="btn scoreBtn btn-secondary">9</button>
                  <button type="button" data-score="10" class="btn scoreBtn btn-secondary">10</button>
                  <button type="button" data-score="11" class="btn scoreBtn btn-secondary">11</button>
                  <button type="button" data-score="12" class="btn scoreBtn btn-secondary">12</button>
               </div>
            </div>

查询：

 var playerScore = 100; //starting score
  $('#playerScore').html(playerScore); // set starting player score

$(".scoreBtn").click(function() {
         var getCurrentScore = playerScore; //get player score
         var clickedScore = $(this).attr("data-score"); // get clicked button score
         var newScore = getCurrentScore - clickedScore; // subtract current score from clicked button score

         $('#playerScore').html(newScore); //update current score

      });

当我第一次单击任何按钮时它可以工作，但是当我第二次单击同一个按钮时它不起作用。

标签： javascriptjqueryhtml

解决方案

玩家分数定义为 100，并且您不会在单击按钮时获得更新的分数。您可以通过更新函数中的分数来解决此问题，这可以通过执行以下操作来完成：

var getCurrentScore = $('#playerScore').text(); //get player score

你的功能变成：

$(".scoreBtn").click(function() {
     var getCurrentScore = $('#playerScore').text(); //get player score
     var clickedScore = $(this).attr("data-score"); // get clicked button score
     var newScore = getCurrentScore - clickedScore; // subtract current score from clicked button score

     $('#playerScore').html(newScore); //update current score
});

在以下代码段中尝试一下：

var playerScore = 100; //starting score
$('#playerScore').html(playerScore); // set starting player score

$(".scoreBtn").click(function() {
   var getCurrentScore = $('#playerScore').text(); //get player score
   var clickedScore = $(this).attr("data-score"); // get clicked button score
   var newScore = getCurrentScore - clickedScore; // subtract current score from clicked button score

   $('#playerScore').html(newScore); //update current score

});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="playerScore">120</div>
<div class="col-md-12 bg-dark">
   <div class="btn-group d-flex align-content-stretch" role="group" aria-label="Basic example">
      <button type="button" data-score="5" class="btn scoreBtn btn-secondary">5</button>
      <button type="button" data-score="6" class="btn scoreBtn btn-secondary">6</button>
      <button type="button" data-score="7" class="btn scoreBtn btn-secondary">7</button>
      <button type="button" data-score="8" id="scoreBtn" class="btn scoreBtn btn-secondary">8</button>
   </div>
</div>
<div class="col-md-12 bg-dark">
   <div class="btn-group d-flex align-content-stretch" role="group" aria-label="Basic example">
      <button type="button" data-score="9" class="btn scoreBtn btn-secondary">9</button>
      <button type="button" data-score="10" class="btn scoreBtn btn-secondary">10</button>
      <button type="button" data-score="11" class="btn scoreBtn btn-secondary">11</button>
      <button type="button" data-score="12" class="btn scoreBtn btn-secondary">12</button>
   </div>
</div>

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