Make web use the redux settings/profile

react/features/base/storage/README.md

@@ -6,18 +6,20 @@ store/state into window.localStorage (on Web) or AsyncStorage (on mobile).
 Usage
 =====
 If a subtree of the redux store should be persisted (e.g.
-`'features/base/profile'`), then persistence for that subtree should be
+`'features/base/settings'`), then persistence for that subtree should be
 requested by registering the subtree with `PersistenceRegistry`.
 
-For example, to register the field `profile` of the redux subtree
-`'features/base/profile'` to be persisted, use:
+For example, to register the field `displayName` of the redux subtree
+`'features/base/settings'` to be persisted, use:
 ```javascript
-PersistenceRegistry.register('features/base/profile', {
-    profile: true
+PersistenceRegistry.register('features/base/settings', {
+    displayName: true
 });
 ```
 
-in the `reducer.js` of the `base/profile` feature.
+in the `reducer.js` of the `base/settings` feature.
+
+If the second parameter is omitted, the entire feature state is persisted.
 
 When it's done, Jitsi Meet will automatically persist these subtrees and
 rehydrate them on startup.
@@ -31,3 +33,12 @@ throttling timeout can be configured in
 ```
 react/features/base/storage/middleware.js#PERSIST_STATE_DELAY
 ```
+
+Serialization
+=============
+The API JSON.stringify() is currently used to serialize feature states,
+therefore its limitations affect the persistency feature too. E.g. complex
+objects, such as Maps (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map)
+or Sets (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set)
+cannot be automatically persisted at the moment. The same applies to Functions
+(which is not a good practice to store in Redux anyhow).