title: pdfmake - cant find the font files on vfs
body: <p>I have the following code I am using to test drive <code>PDFmake</code>.
  I am having an issue with the location of the font files. I see documentation that seem to indicate that after pulling in the <strong>vfs_fonts</strong> file that I should be able to see them. However this is not the case for me.</p>
  
  <pre><code>function createPdf(assessmentId: string): string {
    const pdfMake = require('pdfmake/build/pdfmake.js');
    const pdfFonts = require('pdfmake/build/vfs_fonts.js');
    pdfMake.vfs = pdfFonts.pdfMake.vfs;
  
    //required font setup, requires that you link to the fonts shipped with npm
  
    const fontDescriptors = {
      Roboto: {
        normal: 'Roboto-Regular.ttf',
        bold: 'Roboto-Medium.ttf',
        italics: 'Roboto-Italic.ttf',
        bolditalics: 'Roboto-Italic.ttf',
      }
    };
    const termpaper = new PdfLayout();
    const docDefinition = termpaper.layout
    const printer = new Printer(fontDescriptors);
  
    //get a reference to the PdfKit instance, which is a streaming interface
  
    const pdfDoc = printer.createPdfKitDocument(docDefinition);
  
    return "pdflocation";
  }
  </code></pre>
  
  <p>When this code executes I get this error.</p>
  
  <blockquote>
    <p>Error: </p>
    
    <p>ENOENT: no such file or directory, open 'Roboto-Medium.ttf'
        at Error (native)
        at Object.fs.openSync (fs.js:642:18)
        at Object.fs.readFileSync (fs.js:510:33)
        at Object.fontkit.openSync (/user_code/node_modules/pdfmake/node_modules/fontkit/index.js:43:19)
        at Function.PDFFont.open (/user_code/node_modules/pdfmake/node_modules/pdfkit/js/font.js:14:24)
        at PDFDocument.font (/user_code/node_modules/pdfmake/node_modules/pdfkit/js/mixins/fonts.js:39:28)
        at FontProvider.provideFont (/user_code/node_modules/pdfmake/src/fontProvider.js:49:58)
        at /user_code/node_modules/pdfmake/src/textTools.js:258:27
        at Array.forEach (native)
        at measure (/user_code/node_modules/pdfmake/src/textTools.js:240:13)</p>
  </blockquote>
  
  <p>What do I need to do to properly find these font files?</p>