I created a function generated pdf that are using

   const pdfDocGenerator = pdfMake.createPdf(docDefinition);
    pdfDocGenerator.getBase64((pdfData) => {
      resolve({
        pdfData: `data:application/pdf;base64,${pdfData}`,
        onlyData: pdfData,
      });
    });

the code pdfDocGenerator.getBase64 saying its undefined but pdfDocGenerator is having a value.

my pdfDocGenerator console.

can someone help with this Im using new promise inside of generatepdf file and there's an index file that calling the generatedpdf

added information

what if I want created pdf and open with still not working blank

CODE REPRODUCE: https://stackblitz.com/edit/react-gw7c3h?file=src%2FApp.js