JSPM

const fs = require('fs');
var source = fs.readFileSync('test.jpg');
var typedArray = new Uint8Array(source);
const Module = require('dbrjs');
Module.onRuntimeInitialized = function() {
    let dbr = new Module.BarcodeReaderWasm("<License>");
    let results = dbr.DecodeFileInMemory(typedArray, "");
    let json = JSON.parse(results);
    let barcodeResults = json['textResult'];
    let txts = [];
    for (let i = 0; i < barcodeResults.length; ++i) {
        txts.push(Buffer.from(barcodeResults[i].BarcodeText, 'base64').toString('ascii'));
      }
    console.log(txts.join(", "));
};

var reader;
Module.onRuntimeInitialized = function () {
  document.getElementById('anim-loading').style.display = 'none';
  buttonFile.disabled = false;
  buttonVideo.disabled = false;
  reader = new Module.BarcodeReaderWasm("<License>");
};

if (reader) {
    try {
        // results = reader.DecodeBuffer(idd.buffer, imageWidth, imageHeight, imageWidth * 4, 7, "");
        let results = reader.DecodeFileInMemory(arrayBuffer, "");
        let json = JSON.parse(results);
        let barcodeResults = json['textResult'];
        let txts = [];
        for (let i = 0; i < barcodeResults.length; ++i) {
          txts.push(b64DecodeUnicode(barcodeResults[i].BarcodeText));
        }
        barcode_result.textContent = txts.join(", ");
      } catch (e) {
        console.log(e);
      }
}