message: removing window reference
diff: @@ -63,7 +63,7 @@ export class Ticker {
  // call tick initially
  tick();`,
  ]);
  - const blobUrl = window.URL.createObjectURL(blob);
  + const blobUrl = URL.createObjectURL(blob);
  const worker = new Worker(blobUrl);
  worker.onmessage = this._callback.bind(this);
  @@ -75,7 +75,7 @@ export class Ticker {
  * Create a timeout loop
  */
  private _createTimeout(): void {
  - this._timeout = window.setTimeout(() => {
  + this._timeout = setTimeout(() => {
  this._createTimeout();
  this._callback();
  }, this._updateInterval * 1000);
  