Update the JSDoc for enableIndexedDbPersistence (#7852)

Author: milaGGL

docs-devsite/firestore_.md

@@ -26,8 +26,8 @@ https://github.com/firebase/firebase-js-sdk
 |  [connectFirestoreEmulator(firestore, host, port, options)](./firestore_.md#connectfirestoreemulator_7c247cd) | Modify this instance to communicate with the Cloud Firestore emulator.<!-- -->Note: This must be called before this instance has been used to do any operations. |
 |  [disableNetwork(firestore)](./firestore_.md#disablenetwork_231a8e0) | Disables network usage for this instance. It can be re-enabled via [enableNetwork()](./firestore_.md#enablenetwork_231a8e0)<!-- -->. While the network is disabled, any snapshot listeners, <code>getDoc()</code> or <code>getDocs()</code> calls will return results from cache, and any write operations will be queued until the network is restored. |
 |  [doc(firestore, path, pathSegments)](./firestore_.md#doc_1eb4c23) | Gets a <code>DocumentReference</code> instance that refers to the document at the specified absolute path. |
-|  [enableIndexedDbPersistence(firestore, persistenceSettings)](./firestore_.md#enableindexeddbpersistence_224174f) | Attempts to enable persistent storage, if possible.<!-- -->Must be called before any other functions (other than [initializeFirestore()](./firestore_.md#initializefirestore_fc7d200)<!-- -->, [getFirestore()](./firestore_.md#getfirestore) or [clearIndexedDbPersistence()](./firestore_.md#clearindexeddbpersistence_231a8e0)<!-- -->.<!-- -->If this fails, <code>enableIndexedDbPersistence()</code> will reject the promise it returns. Note that even after this failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled.<!-- -->There are several reasons why this can fail, which can be identified by the <code>code</code> on the error.<!-- -->\* failed-precondition: The app is already open in another browser tab. \* unimplemented: The browser is incompatible with the offline persistence implementation.<!-- -->Persistence cannot be used in a Node.js environment. |
-|  [enableMultiTabIndexedDbPersistence(firestore)](./firestore_.md#enablemultitabindexeddbpersistence_231a8e0) | Attempts to enable multi-tab persistent storage, if possible. If enabled across all tabs, all operations share access to local persistence, including shared execution of queries and latency-compensated local document updates across all connected instances.<!-- -->If this fails, <code>enableMultiTabIndexedDbPersistence()</code> will reject the promise it returns. Note that even after this failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled.<!-- -->There are several reasons why this can fail, which can be identified by the <code>code</code> on the error.<!-- -->\* failed-precondition: The app is already open in another browser tab and multi-tab is not enabled. \* unimplemented: The browser is incompatible with the offline persistence implementation. |
+|  [enableIndexedDbPersistence(firestore, persistenceSettings)](./firestore_.md#enableindexeddbpersistence_224174f) | Attempts to enable persistent storage, if possible.<!-- -->On failure, <code>enableIndexedDbPersistence()</code> will reject the promise or throw an exception. There are several reasons why this can fail, which can be identified by the <code>code</code> on the error.<!-- -->\* failed-precondition: The app is already open in another browser tab. \* unimplemented: The browser is incompatible with the offline persistence implementation.<!-- -->Note that even after a failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled.<!-- -->Note: <code>enableIndexedDbPersistence()</code> must be called before any other functions (other than [initializeFirestore()](./firestore_.md#initializefirestore_fc7d200)<!-- -->, [getFirestore()](./firestore_.md#getfirestore) or [clearIndexedDbPersistence()](./firestore_.md#clearindexeddbpersistence_231a8e0)<!-- -->.<!-- -->Persistence cannot be used in a Node.js environment. |
+|  [enableMultiTabIndexedDbPersistence(firestore)](./firestore_.md#enablemultitabindexeddbpersistence_231a8e0) | Attempts to enable multi-tab persistent storage, if possible. If enabled across all tabs, all operations share access to local persistence, including shared execution of queries and latency-compensated local document updates across all connected instances.<!-- -->On failure, <code>enableMultiTabIndexedDbPersistence()</code> will reject the promise or throw an exception. There are several reasons why this can fail, which can be identified by the <code>code</code> on the error.<!-- -->\* failed-precondition: The app is already open in another browser tab and multi-tab is not enabled. \* unimplemented: The browser is incompatible with the offline persistence implementation.<!-- -->Note that even after a failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled. |
 |  [enableNetwork(firestore)](./firestore_.md#enablenetwork_231a8e0) | Re-enables use of the network for this [Firestore](./firestore_.firestore.md#firestore_class) instance after a prior call to [disableNetwork()](./firestore_.md#disablenetwork_231a8e0)<!-- -->. |
 |  [getPersistentCacheIndexManager(firestore)](./firestore_.md#getpersistentcacheindexmanager_231a8e0) | Returns the PersistentCache Index Manager used by the given <code>Firestore</code> object. The <code>PersistentCacheIndexManager</code> instance, or <code>null</code> if local persistent storage is not in use. |
 |  [loadBundle(firestore, bundleData)](./firestore_.md#loadbundle_bec5b75) | Loads a Firestore bundle into the local cache. |
@@ -459,13 +459,13 @@ If the final path has an odd number of segments and does not point to a document
 
 Attempts to enable persistent storage, if possible.
 
-Must be called before any other functions (other than [initializeFirestore()](./firestore_.md#initializefirestore_fc7d200)<!-- -->, [getFirestore()](./firestore_.md#getfirestore) or [clearIndexedDbPersistence()](./firestore_.md#clearindexeddbpersistence_231a8e0)<!-- -->.
+On failure, `enableIndexedDbPersistence()` will reject the promise or throw an exception. There are several reasons why this can fail, which can be identified by the `code` on the error.
 
-If this fails, `enableIndexedDbPersistence()` will reject the promise it returns. Note that even after this failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled.
+\* failed-precondition: The app is already open in another browser tab. \* unimplemented: The browser is incompatible with the offline persistence implementation.
 
-There are several reasons why this can fail, which can be identified by the `code` on the error.
+Note that even after a failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled.
 
-\* failed-precondition: The app is already open in another browser tab. \* unimplemented: The browser is incompatible with the offline persistence implementation.
+Note: `enableIndexedDbPersistence()` must be called before any other functions (other than [initializeFirestore()](./firestore_.md#initializefirestore_fc7d200)<!-- -->, [getFirestore()](./firestore_.md#getfirestore) or [clearIndexedDbPersistence()](./firestore_.md#clearindexeddbpersistence_231a8e0)<!-- -->.
 
 Persistence cannot be used in a Node.js environment.
 
@@ -497,12 +497,12 @@ A `Promise` that represents successfully enabling persistent storage.
 
 Attempts to enable multi-tab persistent storage, if possible. If enabled across all tabs, all operations share access to local persistence, including shared execution of queries and latency-compensated local document updates across all connected instances.
 
-If this fails, `enableMultiTabIndexedDbPersistence()` will reject the promise it returns. Note that even after this failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled.
-
-There are several reasons why this can fail, which can be identified by the `code` on the error.
+On failure, `enableMultiTabIndexedDbPersistence()` will reject the promise or throw an exception. There are several reasons why this can fail, which can be identified by the `code` on the error.
 
 \* failed-precondition: The app is already open in another browser tab and multi-tab is not enabled. \* unimplemented: The browser is incompatible with the offline persistence implementation.
 
+Note that even after a failure, the [Firestore](./firestore_.firestore.md#firestore_class) instance will remain usable, however offline persistence will be disabled.
+
 <b>Signature:</b>
 
 ```typescript

packages/firestore/src/api/database.ts

@@ -305,20 +305,20 @@ export function configureFirestore(firestore: Firestore): void {
 /**
  * Attempts to enable persistent storage, if possible.
  *
- * Must be called before any other functions (other than
- * {@link initializeFirestore}, {@link (getFirestore:1)} or
- * {@link clearIndexedDbPersistence}.
+ * On failure, `enableIndexedDbPersistence()` will reject the promise or
+ * throw an exception. There are several reasons why this can fail, which can be
+ * identified by the `code` on the error.
  *
- * If this fails, `enableIndexedDbPersistence()` will reject the promise it
- * returns. Note that even after this failure, the {@link Firestore} instance will
- * remain usable, however offline persistence will be disabled.
+ *   * failed-precondition: The app is already open in another browser tab.
+ *   * unimplemented: The browser is incompatible with the offline persistence
+ *     implementation.
  *
- * There are several reasons why this can fail, which can be identified by
- * the `code` on the error.
+ * Note that even after a failure, the {@link Firestore} instance will remain
+ * usable, however offline persistence will be disabled.
  *
- *   * failed-precondition: The app is already open in another browser tab.
- *   * unimplemented: The browser is incompatible with the offline
- *     persistence implementation.
+ * Note: `enableIndexedDbPersistence()` must be called before any other functions
+ * (other than {@link initializeFirestore}, {@link (getFirestore:1)} or
+ * {@link clearIndexedDbPersistence}.
  *
  * Persistence cannot be used in a Node.js environment.
  *
@@ -371,17 +371,17 @@ export function enableIndexedDbPersistence(
  * shared execution of queries and latency-compensated local document updates
  * across all connected instances.
  *
- * If this fails, `enableMultiTabIndexedDbPersistence()` will reject the promise
- * it returns. Note that even after this failure, the {@link Firestore} instance will
- * remain usable, however offline persistence will be disabled.
- *
- * There are several reasons why this can fail, which can be identified by
- * the `code` on the error.
+ * On failure, `enableMultiTabIndexedDbPersistence()` will reject the promise or
+ * throw an exception. There are several reasons why this can fail, which can be
+ * identified by the `code` on the error.
  *
  *   * failed-precondition: The app is already open in another browser tab and
  *     multi-tab is not enabled.
- *   * unimplemented: The browser is incompatible with the offline
- *     persistence implementation.
+ *   * unimplemented: The browser is incompatible with the offline persistence
+ *     implementation.
+ *
+ * Note that even after a failure, the {@link Firestore} instance will remain
+ * usable, however offline persistence will be disabled.
  *
  * @param firestore - The {@link Firestore} instance to enable persistence for.
  * @returns A `Promise` that represents successfully enabling persistent