使用jQuery和Bootstrap实现前端点赞功能

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>对span标签控制鼠标点击</title>
    <script type="text/javascript" src="js/jquery-3.3.1.js" ></script>
    <script type="text/javascript" src="js/bootstrap.min.js" ></script>
  </head>
  <body>
    <h5 style="font-family: '微软雅黑';">图片文字并排摆放，文字局域图片腰部</h5>
    <!--<span style="font-family: '微软雅黑';color: orangered;font-size: 10px; ">注意：有些浏览器不支持旋转的特性transform:正如你所看到的<br/></span>-->
     
    <span id="goodSpan" onclick="sendGood()">
      <img src="img/good.jpg" style="width: 25px; height: 25px;" /> 
    </span>
    [<span id="good"></span>]
      
    <span id="badSpan" onclick="sendBad()">
      <img src="img/good.jpg" style="width: 25px; height: 25px; transform: rotate(180deg);" /> 
    </span>
    [<span id="bad"></span>]
     
    <script>
      /*点赞的数量：*/
      document.getElementById("good").innerText = "";
      var good = document.getElementById("good").textContent;
       
      document.getElementById("bad").innerText = "";
      var bad = document.getElementById("bad").textContent;
      window.onload = function(){
        if (good == "") {
          good = 0;
          document.getElementById("good").innerText = 0;
        }
        if (bad == "") {
          bad = 0;
          document.getElementById("bad").innerText = 0;
        }       
      }
       
      /*点赞的数量：*/
      function sendGood(){
        good = parseInt(good) + 1;
        document.getElementById("good").innerText = good;
         
        document.getElementById("goodSpan").onclick = function(e){
          e.preventDefault();
          e.stopImmediatePropagation();
        }
      }
       
       
      /*踩的数量：*/
      function sendBad(){
        bad = parseInt(bad) + 1;
        document.getElementById("bad").innerText = bad;
        document.getElementById("badSpan").onclick = function(e){
          e.preventDefault();
          e.stopImmediatePropagation();
        }
      }
    </script>
  </body>
</html>