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Showing content from http://developer.mozilla.org/en-US/docs/Web/API/NavigationPreloadManager/disable below:

NavigationPreloadManager: disable() method - Web APIs

Baseline Widely available

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is available in Web Workers.

The disable() method of the NavigationPreloadManager interface halts the automatic preloading of service-worker-managed resources previously started using enable() It returns a promise that resolves with undefined.

The method may be called in the service worker's activate event handler (before the fetch event handler can be called).

None.

A Promise that resolves with undefined.

InvalidStateError DOMException

There is no active worker associated with the registration to which this NavigationPreloadManager belongs.

The code below shows how to disable preloading, after first using ServiceWorkerRegistration.navigationPreload to test that it is supported.

addEventListener("activate", (event) => {
  event.waitUntil(
    (async () => {
      if (self.registration.navigationPreload) {
        // Disable navigation preloads!
        await self.registration.navigationPreload.disable();
      }
    })(),
  );
});

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