PrimordialUniverse/worker/decoderWorker.js

const Events = {
  DecodeMessage: 0,
  UpdateStats: 1,
  WASMReady: 2,
  CacheFrame: 3,
  RecordVideo: 4,
  OnlyEmitSignal: 5,
  WASMReadyCost: 6,
  PanoramaMessage: 7,
  RequestIFrame: 8,
  ConsoleLog: 9,
  ConsoleError: 10,
};
const printConsole = {
  log: (msg) => self.postMessage({ event: Events.ConsoleLog, printMsg: msg }),
  error: (msg, code) =>
    self.postMessage({ event: Events.ConsoleError, printMsg: msg, code: code }),
};

class Decoder {
  constructor() {}
  loadWASM(url) {
    printConsole.log("Load WASM from " + String(url));
    try {
      self.importScripts(url);
    } catch (e) {
      printConsole.error(e.message, "5003");
    }
  }
}
if ("function" === typeof importScripts) {
  printConsole.log("22222");
}

self.decoder = new Decoder();

self.onmessage = (event) => {
  switch (event.data.event) {
    case 0:
      self.postMessage({});
      break;
    case 9:
      self.decoder.loadWASM(event.data.url);
      printConsole.log("22222");
    default:
      break;
  }
};