gecko-dev/dom/workers/test/location_worker.js

/**
 * Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/
 */
for (var string in self.location) {
  var value =
    typeof self.location[string] === "function"
      ? self.location[string]()
      : self.location[string];
  postMessage({ string: string, value: value });
}
postMessage({ string: "testfinished" });