node-anvil VS pdfjs

First thing, make sure you have an API key, then install the Anvil Node API client:

We’ve gone through all the steps for integrating Anvil’s embedded signing process into your React app, from generating a signature packet using the Anvil Node-client to embedding the signing page using the Anvil React component library. I hope through this blog you’ve gained a better understanding of how the process works so you can incorporate this tool into your app!

Option 1. Generating the PDF with the node-anvil library:

While the examples will be in JavaScript / Node using the node-anvil client library, concepts are the same across platforms. node-anvil abstracts authentication and GraphQL requests for us, but the meat of the integration is in the variables passed to the GraphQL mutation, which will work the same on any platform.

pdfjs was pretty good when I used it https://github.com/rkusa/pdfjs

We use the pdfjs package here to generate the PDF for us. It just has dummy content in our case. You might generate it from scratch or compose it from other PDFs in your real-world app. See more on pdfjs usage in the docs. The most important part is the output we return in line 12. For a static site, aim to return an object with a body field which is a string. For SSR you can return a Response object instead and even stream HTML. We use binary encoding here which makes sure Astro encodes PDFs including images (for example) correctly — thanks to @altano for tip here.