Feature: #64031 - JavaScript Storage API

See Issue #64031


Accessing the Backend User configuration ($BE_USER->uc) can be handled in JavaScript with a common and simple key-value storage manner, allowing to store any data. Additionally, the use of HTML5s localStorage allows to store any data in the same way inside the browser. All localStorage data is prefixed with "t3-" in order to avoid collisions with other data from the same browserStorage.


API Methods

The API provides two objects available in the top frame attached to the global TYPO3 object:

  1. top.TYPO3.Storage.Client
  2. top.TYPO3.Storage.Persistent

Each object has the following 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.
  • clear() to empty all data inside the storage.


To fetch data from the persistent user configuration, simple use the key known already:


Storing / Updating data in the storage works like this, and can contain any data type.

top.TYPO3.Storage.Persistent.set('startModule', 'web_info');

The same is possible for browserStorage using top.TYPO3.Storage.Client.