title: Combine existing bundled JavaScript WebPack module with TypeScript and re-bundle them
body: <p>I have converted my angularjs application from javascript to typescript and I tried different ways to import formula-parser <a href="https://github.com/handsontable/formula-parser/" rel="nofollow noreferrer">https://github.com/handsontable/formula-parser/</a> to typescript and defined formulaParser in typings.d.ts but formulaParser always is undefined.</p>
  
  <pre><code>import "./formula-parser.js";
  
  import   formulaParser from "./formula-parser"
  
  var parser = new formulaParser.Parser();
  </code></pre>
  
  <p>I couldn't find any appropriate solution so I just defined formulaParser as</p>
  
  <pre><code> var formulaParser: any;
  </code></pre>
  
  <p>and included the js file in the html page without any bundling.</p>