support clearing application code cache

src/lib/cache.ts

@@ -229,6 +229,23 @@ export function clearMapDataCache(): Promise<void> {
     });
 }
 
+export function clearApplicationCodeCache(): Promise<void> {
+    if (!window.caches) {
+        logger.error('caches API is not supported in this browser');
+        return Promise.reject();
+    }
+
+    return window.caches.delete(SW_CODE_CACHE_NAME).then(success => {
+        if (success) {
+            logger.info(`cache "${SW_CODE_CACHE_NAME}" cleared successfully`);
+        } else {
+            logger.warn(`failed to clear cache "${SW_CODE_CACHE_NAME}"`);
+        }
+    }).catch(error => {
+        logger.error(`failed to clear cache "${SW_CODE_CACHE_NAME}"`, error);
+    });
+}
+
 export function clearAllBrowserCaches(): Promise<void> {
     if (!window.caches) {
         logger.error('caches API is not supported in this browser');