Generate pdf in angular

[![Ayuda amigos me genera este error][1]][1]

estoy haciendo un generador de php y lo tengo de esta manera pero no me funciona

ts del componente

convertJsonToPdf(){

  var elem = document.getElementById("generate");
      var doc = new jsPDF ('1', 'pt', 'letter');
      var elem = document.getElementById("table");
      var data = doc.autoTableHtmlToJson(elem);

      var positions = [];
      doc.autoTable(data.columns, data.rows);

      doc.save("table.pdf");

    }

html del componente
<button type="button" class="botonclic2 btn btn-outline-info" (click)="convertJsonToPdf()">Generar PDF</button>


Me guie de esto
Hello, try it.

To work with jspdf-autotable in angular 5, one must install jspdf and jspdf-autotable via npm

npm install jspdf-autotable --save
also add the jspdf and jspdf-autotable files to the scripts array in angular-cli.json

"scripts": [
"../node_modules/jspdf/dist/jspdf.min.js",
"../node_modules/jspdf-autotable/dist/jspdf.plugin.autotable.js"
],
and in component never import jspdf or jspdf-autotable just

declare var jsPDF: any;
Of course before working with jspdf-autotable one should install jspdf and for development @types/jspdf via npm

npm install jspdf --save
npm install @types/jspdf --save-dev