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<!DOCTYPE html>
<title>Helper frame</title>
<!-- This resource file is used in the WPT at:
wpt/storage/partitioned-estimate-usage-details-service-workers.tentative.https.sub.html
A full list of the test steps referenced here are defined in that WPT -->
<script>
// Helper function to obtain service worker usage details for both the same-
// partition iframe and cross-partition iframe.
const usageDetails = async () => {
return (await navigator.storage.estimate())
.usageDetails.serviceWorkerRegistrations || 0
}
// Define test variables.
let details = {};
// Step 5: Our same-partition iframe intercepts the "get-details"
// postMessage, obtains the service worker usage details available to the
// iframe, and postMessages the usage back to the test window.
window.addEventListener("message", async event => {
if (event.data === "get-details") {
details.source = "same-site";
details.init = await usageDetails();
event.source.postMessage(details, event.source.origin);
}
});
// Step 8: Once created and loaded, our cross-partition iframe has an
// on-load listener that is triggered. To check that our script is executing
// in the cross-partition iframe (and not the same-partition iframe), we
// check that our parent has a valid opener value.
window.addEventListener("load", async () => {
if (parent.opener) {
// Step 9: Then, our cross-partition iframe obtains the service worker
// usage details available to it and postMessages the usage back
// to the test window.
details.source = "cross-site";
details.init = await usageDetails();
parent.opener.postMessage(details, parent.opener.origin);
}
});
// Step 1: Notify our parent test window that the same-partition iframe
// has been created. (Note: this script is shared between both the same-
// partition iframe and the cross-partition iframe, but is only
// intercepted by the test window in the case of the same-partition iframe).
// This postMessage alerts our test window that it can begin recording
// service worker usage.
window.parent.postMessage("iframe-is-ready", window.parent.origin);
</script>