Shared runtime requirement sets

Requirement sets are named groups of API members. Office Add-ins use requirement sets specified in the manifest or use a runtime check to determine whether an Office application supports APIs that an add-in needs. For more information, see Office versions and requirement sets.

Parts of an Office Add-in that run JavaScript code, such as task panes, function files launched from add-in commands, and Excel custom functions, can share a single JavaScript runtime. This enables all the parts to share a set of global variables, to share a set of loaded libraries, and to communicate with each other without having to pass messages through a persisted storage. For more information, see Configure your Office Add-in to use a shared JavaScript runtime.

The following table lists the Shared Runtime requirement sets, the supported Office client applications, and the minimum builds or versions for those applications where applicable.

Requirement set Office on Windows
- Microsoft 365 subscription
- retail perpetual Office 2016 and later
Office on Windows
(volume-licensed perpetual)
Office on Mac Office on iPad Office on the web Office Online Server
SharedRuntime 1.2 Excel: Version 2108 (Build 14326.20508) Not supported Excel: Not supported Excel: Supported Not supported
SharedRuntime 1.1 Excel: Version 2002 (Build 12527.20092)

PowerPoint: Version 2102 (Build 13722.10000)

Word: Version 2205 (Build 15202.10000)
Excel 2021: Version 2108 (Build 12527.20092)

PowerPoint 2021: Version 2108 (13722.10000)
Excel: 16.35


Word: 16.61.401.0
Not supported Excel, PowerPoint, Word: Supported Not supported

Office versions and build numbers

To find out more about versions, build numbers, and Office Online Server, see:

Office Common API requirement sets

For information about Common API requirement sets, see Office Common API requirement sets.

SharedRuntime API 1.1

The SharedRuntime API 1.1 is the first version of the API. For details, see the Office.Addin reference topic.

SharedRuntime API 1.2

The SharedRuntime API 1.2 adds the Office.BeforeDocumentCloseNotification interface, which helps ensure that workbooks don't close while an add-in process is running.


SharedRuntime 1.2 is only supported in Excel.

See also