Load a PDF from a Stream

Q: How can I load a PDF from a stream?

A: PSPDFKit for Web can load a document from an ArrayBuffer. You will need to convert your stream into an ArrayBuffer that can be passed in PSPDFKit.Configuration#pdf. Here is a possible way to do so:

// replace "URL" with your stream URL
  // Retrieve its body as ReadableStream
  .then(response => response.body)
  .then(rs => {
    const reader = rs.getReader();

    return new ReadableStream({
      async start(controller) {
        while (true) {
          const { done, value } = await reader.read();

          // When no more data needs to be consumed, break the reading
          if (done) {

          // Enqueue the next data chunk into our target stream

        // Close the stream
  // Create a new response out of the stream
  .then(rs => new Response(rs))
  // Create an object URL for the response
  .then(response => response.arrayBuffer())
  .then(arrayBuffer => {
      document: arrayBuffer
    }).then(instance => {
      // Your PSPDFKit code here

This snippet was adapted from a MDN example.