Notes

// Example blobs (replace with your actual blobs)
const blob1 = new Blob([/* First PDF blob data */], { type: 'application/pdf' });
const blob2 = new Blob([/* Second PDF blob data */], { type: 'application/pdf' });

async function mergePDFBlobs(blob1, blob2) {
const { PDFDocument } = PDFLib;

// Load PDFs from blobs
const pdfDoc1 = await PDFDocument.load(await blob1.arrayBuffer());
const pdfDoc2 = await PDFDocument.load(await blob2.arrayBuffer());

// Create a new PDF document
const mergedPdf = await PDFDocument.create();

// Copy pages from each PDF to the merged PDF
const copiedPages1 = await mergedPdf.copyPages(pdfDoc1, pdfDoc1.getPageIndices());
copiedPages1.forEach(page => mergedPdf.addPage(page));

const copiedPages2 = await mergedPdf.copyPages(pdfDoc2, pdfDoc2.getPageIndices());
copiedPages2.forEach(page => mergedPdf.addPage(page));

// Save the merged PDF as a blob
const mergedPdfBlob = await mergedPdf.save();

return new Blob([mergedPdfBlob], { type: 'application/pdf' });
}

// Usage example
mergePDFBlobs(blob1, blob2).then(mergedBlob => {
// Use mergedBlob as needed (e.g., download or display)
console.log('Merged PDF blob:', mergedBlob);
}).catch(error => {
console.error('Error merging PDF blobs:', error);
});