Get page URL parameters from a service worker

Question

How do I get page URL with parameters from a service worker?

I have tried self.registration.scope but that doesn't include the parameters.

Answer 1

You can get waiting.scriptURL or active.scriptURL, pass result to URL() constructor, get .search property of object

  navigator.serviceWorker.register("sw.js?abc=123")
  .then(function(reg) {
    const scriptURL = reg.waiting && reg.waiting.scriptURL || reg.active.scriptURL;
    const url =  new URL(scriptURL);
    const queryString = url.search;
    console.log(queryString);
  }).catch(function(err) {
    console.log("err", err);
  });

Answer 2

I'm not clear as to whether you're asking about getting the service worker script's URL, or the URLs of all of the client pages that are open under the service worker's scope. So... here's how to do both:

// Get a URL object for the service worker script's location.
const swScriptUrl = new URL(self.location);

// Get URL objects for each client's location.
self.clients.matchAll({includeUncontrolled: true}).then(clients => {
  for (const client of clients) {
    const clientUrl = new URL(client.url);
  }
});

In either of those cases, once you have a URL object, you can use its searchParams property if you're interested in the query parameters:

if (url.searchParams.get('key') === 'value') {
  // Do something if the URL contains key=value as a query parameter.
}