clearCache method

@override Future<void> clearCache()

Clears the browser's Cache Storage.

Implementation

@override
Future<void> clearCache() async {
  try {
    // The Cache API is only available in secure contexts (HTTPS), except for localhost.
    // We use a try-catch block to handle cases where it might be unavailable.
    final JSArray<JSString> keys = await window.caches.keys().toDart;
    final List<String> dartKeys =
        keys.toDart.map((jsString) => jsString.toDart).toList();

    // Filter for caches that are typically created by Flutter web apps.
    final flutterCacheKeys =
        dartKeys
            .where(
              (key) =>
                  key.startsWith('flutter-') || key.contains('-asset-cache'),
            )
            .toList();

    if (flutterCacheKeys.isEmpty) {
      debugPrint('WebCacheClear: No caches found to clear.');
      return;
    }

    debugPrint(
      'WebCacheClear: Found Flutter caches: $flutterCacheKeys. Attempting to delete...',
    );

    for (final String key in flutterCacheKeys) {
      // The key needs to be converted back to JSString for the delete method.
      await window.caches.delete(key).toDart;
      debugPrint('WebCacheClear: Deleted cache with key: $key');
    }
  } catch (e) {
    debugPrint(
      'WebCacheClear: An error occurred while clearing cache: $e. This can happen if the site is not served over HTTPS.',
    );
  }
}