testing/web-platform/tests/service-workers/service-worker/resources/postmessage-on-load-worker.js


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if ('DedicatedWorkerGlobalScope' in self &&
    self instanceof DedicatedWorkerGlobalScope) {
  postMessage('dedicated worker script loaded');
} else if ('SharedWorkerGlobalScope' in self &&
    self instanceof SharedWorkerGlobalScope) {
  self.onconnect = evt => {
    evt.ports[0].postMessage('shared worker script loaded');
  };
}