未捕获的 ReferenceError：未定义 jsPDF

Question

新手上路，请多包涵

所以这是我的 HTML 代码，我试图将 div abc 中输出的任何内容获取到可下载的 pdf 文件。

 <!-- Page Heading -->
<div class="row">
    <div class="col-lg-12">
        <h1 class="page-header">
            Reports
        </h1>
        <ol class="breadcrumb">
            <li>
                <i class="fa fa-dashboard"></i>  <a href="dashboard">Dashboard</a>
            </li>
            <li class="active">
                <i class="fa fa-edit"></i> Reports
            </li>

        </ol>
        <body>
          <div id="abc">
</div>
<div id="editor"></div>
<button id="cmd">Download Survey Report</button>
        <div id="abc">

        </div>
        </body>

        <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.3/jspdf.min.js"></script>
        <script>

                var doc = new jsPDF();
                var specialElementHandlers = {
                  '#editor': function (element, renderer) {
                return true;
            }
        };

        $('#cmd').click(function () {
            doc.fromHTML($('#abc').html(), 15, 15, {
                'width': 170,
                    'elementHandlers': specialElementHandlers
            });
            doc.save('SurveyReport.pdf');
        });
        </script>

        <script>
        firebase.auth().onAuthStateChanged(function(user){
          if(user){
            var userID = user.uid;
            RetrieveSurvey(userID,1,PrintSurvey(document.getElementById("abc")));
          }
        })
        </script>

    </div>
</div>

我在控制台上收到此错误：