Improve pdfjs support

[sigmaSd]

Currently for pdfjs to work you need this

import DOMMatrix from "npm:@thednp/dommatrix@2.0.12";
globalThis.DOMMatrix = DOMMatrix;
globalThis.process = undefined;
Object.defineProperty(navigator, "platform", {
  value: "Linux",
});
const pdfjsLib = await import("npm:pdfjs-dist@5.4.149");
pdfjsLib.GlobalWorkerOptions.workerSrc = import.meta.resolve("npm:pdfjs-dist@5.4.149/build/pdf.worker.mjs");

Depends on:

• DOMMatrix feat(unstable): Geometry Interfaces Module Level 1 #27527
• navigator.platform Add navigator.platform #24117

What other improvements:

• currently you need to hide process global, I guess this can be improved upstream by detecting deno correctly
• would be great if deno detected the worker automatically
• it shows a warning about using fake worker, maybe there is a way to make it work with normal web workers since deno does support it

Note: The node legacy branch obviously works but it requires ffi (for npm canvas) while this one require no permission

[JLCarveth]

I have doing been the following when using pdfjs:

deno.json:

{
  "nodeModulesDir": "auto",
  "imports": {
    "pdfjs-dist": "npm:pdfjs-dist@5.3.93"
  }
}

main.ts

import * as pdfjsLib from "pdfjs-dist/legacy/build/pdf.mjs";

async function loadPDF(filePath) {
  const data = await Deno.readFile(filePath);
  const pdf = await pdfjsLib.getDocument({ data }).promise;
  console.log(`PDF loaded with ${pdf.numPages} pages`);
}

// Replace with your PDF file path
loadPDF("./example.pdf");

❯ deno run -Ar main.ts
PDF loaded with 1 pages

[sigmaSd]

Yeah that's the legacy build , I want to avoid that be because it requires ffi permission