How do I force clear cache in Angular

Question

With the help of proper programming, can you explain how I force clear cache in Angular?

Answer 1

To force clear the cache in Angular, especially when using service workers for caching, you can implement a custom service worker to handle cache clearing. This involves adding message listeners to the service worker to detect when to clear the cache. You can trigger the cache clearing process from your Angular app when necessary, such as when a user logs out.

Steps to clear the cache:

Modify the Service Worker: In your custom service worker, listen for messages and clear the cache using the caches.delete() API.

self.addEventListener('message', async (event) => {

  if (event.data && event.data.type === 'CLEAR_CACHE') {

    const cacheNames = await self.caches.keys();

    for (let name of cacheNames) {

      await self.caches.delete(name);

    }

  }

});

Send Message from Angular App: When needed, you can send a message from the Angular app to trigger the cache clearing.

if (navigator.serviceWorker.controller) {

  navigator.serviceWorker.controller.postMessage({ type: 'CLEAR_CACHE' });

}

Ensure Service Worker Activation: Ensure that the service worker updates and takes control immediately after installation to clear old caches.