RoamingSettings

(1.1) (Interface) The settings created by using the methods of the RoamingSettings object are saved per add-in and per user.

get	Retrieves the specified setting. Method
remove	Removes the specified setting. Method
saveAsync	Saves the settings. Method
set	Sets or creates the specified setting. Method

get

Retrieves the specified setting. Method

remove

Removes the specified setting. Method

saveAsync

Saves the settings. Method

set

Sets or creates the specified setting. Method

REMARKS

* Any settings previously saved by an add-in are loaded when it is initialized, so during the lifetime of the session you can just use the set and get methods to work with the in-memory copy of the settings property bag. When you want to persist the settings so that they are available the next time the add-in is used, use the saveAsync method.
* The value is stored in the document as the serialized JSON representation of its data type. A maximum of 32KB is available for the settings of each add-in.
* The set method creates a new setting of the specified name if it does not already exist, or sets an existing setting of the specified name.
* Any changes made to settings using the set function will not be saved to the server until the saveAsync function is called.
* For the Microsoft documentation refer to docs.microsoft.com