Factur-X / ZUGFeRD

import { PDFEngines } from "chromiumly";

const invoice = await PDFEngines.facturX({
  files: ["path/to/document.pdf"],
  facturx: {
    facturxXml: "path/to/invoice.xml",
    facturxConformanceLevel: "EN 16931",
    facturxDocumentType: "INVOICE", // optional, defaults to 'INVOICE'
    facturxVersion: "1.0", // optional, defaults to '1.0'
  },
});

type FacturXOptions = {
  facturxXml: PathLikeOrReadStream; // The Factur-X CII invoice XML; embedded as factur-x.xml regardless of the given filename.
  facturxConformanceLevel:
    | "MINIMUM"
    | "BASIC WL"
    | "BASIC"
    | "EN 16931"
    | "EXTENDED"
    | "XRECHNUNG";
  facturxDocumentType?: "INVOICE" | "ORDER" | "ORDER_RESPONSE" | "ORDER_CHANGE"; // Defaults to 'INVOICE'.
  facturxVersion?: string; // Defaults to '1.0'.
  pdfa?: "PDF/A-3a" | "PDF/A-3b" | "PDF/A-3u";
  pdfUA?: boolean;
};

import { HtmlConverter } from "chromiumly";

const htmlConverter = new HtmlConverter();
const buffer = await htmlConverter.convert({
  html: "path/to/index.html",
  facturx: {
    facturxXml: "path/to/invoice.xml",
    facturxConformanceLevel: "EN 16931",
  },
});