Node Pdf to png without system level dependencies

Pdf2Png.js

var Canvas = require('canvas');
var assert = require('assert');
var fs = require('fs');
var pdfjsLib = require('pdfjs-dist');

function NodeCanvasFactory() {}
NodeCanvasFactory.prototype = {
  create: function NodeCanvasFactory_create(width, height) {
    assert(width > 0 && height > 0, 'Invalid canvas size');
    var canvas = Canvas.createCanvas(width, height);
    var context = canvas.getContext('2d');
    return {
      canvas: canvas,
      context: context,
    };
  },

  reset: function NodeCanvasFactory_reset(canvasAndContext, width, height) {
    assert(canvasAndContext.canvas, 'Canvas is not specified');
    assert(width > 0 && height > 0, 'Invalid canvas size');
    canvasAndContext.canvas.width = width;
    canvasAndContext.canvas.height = height;
  },

  destroy: function NodeCanvasFactory_destroy(canvasAndContext) {
    assert(canvasAndContext.canvas, 'Canvas is not specified');
    // Zeroing the width and height cause Firefox to release graphics
    // resources immediately, which can greatly reduce memory consumption.
    canvasAndContext.canvas.width = 0;
    canvasAndContext.canvas.height = 0;
    canvasAndContext.canvas = null;
    canvasAndContext.context = null;
  },
};


// Relative path of the PDF file.
const toImg = async (pdfData) => {
  const pdfDocument = await pdfjsLib.getDocument(new Uint8Array(pdfData)).promise
  // Get the first page.
  const page = await pdfDocument.getPage(0)
  // Render the page on a Node canvas with 100% scale.
  const viewport = page.getViewport({ scale: 1.0, });
  const canvasFactory = new NodeCanvasFactory();
  const canvasAndContext = canvasFactory.create(viewport.width, viewport.height);
  const renderContext = { canvasContext: canvasAndContext.context,
    viewport: viewport,
    canvasFactory: canvasFactory,
  };

  await page.render(renderContext).promise
  return canvasAndContext.canvas.toBuffer();
}
const pdfURL = 'test.pdf';

toImg(fs.readFileSync(pdfURL)).then(buf => process.stdout.write(buf))