[FEATURE] Introduce wrapper for sessionStorage (#1108)

See Core Feature 91738
See #1082

Documentation/ApiOverview/JavaScript/Modules/Index.rst

@@ -20,3 +20,4 @@ be used by extensions.
    Modals
    MultiStepWizard
    DocumentService
+   SessionStorageWrapper

Documentation/ApiOverview/JavaScript/Modules/SessionStorageWrapper.rst

@@ -0,0 +1,25 @@
+.. include:: /Includes.rst.txt
+
+.. _modules-sessionstorage:
+
+======================
+SessionStorage Wrapper
+======================
+
+TYPO3 ships a module acting as a wrapper for :js:`sessionStorage`. It
+behaves similar to the :js:`localStorage`, except that the stored data is dropped
+after the browser session has ended.
+
+The module :js:`TYPO3/CMS/Core/Storage/BrowserSession` allows
+to store data in the :js:`sessionStorage`.
+
+API Methods
+-----------
+
+* `get(key)` To fetch the data behind the key.
+* `set(key, value)` To set/override a key with any arbitrary content.
+* `isset(key)` (bool) checks if the key is in use.
+* `unset(key)` To remove a key from the storage.
+* `clear()` to empty all data inside the storage.
+* `unsetByPrefix(prefix)` to empty all data inside the storage with their keys
+  starting with a prefix