Service worker hello world
The following service worker gets a ping message and responds to it with “pong”:
self.addEventListener("message", (ev) => ev.source.postMessage("pong"));
I’m hosting this service worker at /service-worker.js.
This page registers that service worker as its controller,
wait for the service worker to be ready,
then send it a “ping” message:
if (window.navigator && window.navigator.serviceWorker) {
window.navigator.serviceWorker.addEventListener("message", (ev) => console.log("Received message:", ev.data));
window.navigator.serviceWorker.register("/service-worker.js");
window.navigator.serviceWorker.ready.then((reg) => reg.active.postMessage({"method":"ping"}));
}
Open the JavaScript console. You should see:
Received message: pong
Tagged . All content copyright James Fisher 2017. This post is not associated with my employer.
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