Office JavaScript API reference documentation

Use this page to quickly find the Office JavaScript API reference for the Office host from which you're building an add-in.

Choose the right API model

• Use application-specific APIs when you're building for Excel, Outlook, PowerPoint, Word, or OneNote and need access to host-specific objects and features.
• Use common APIs for cross-host features such as UI, dialogs, and client settings.

Start with application-specific APIs whenever possible. Use common APIs for scenarios that application-specific APIs don't support. For more information about these API models, see Develop Office Add-ins.

Project add-ins currently use common APIs because there isn't an application-specific JavaScript API for Project.

API reference by host

Excel API reference
JavaScript APIs for building Excel add-ins

Outlook API reference
JavaScript APIs for building Outlook add-ins

Word API reference
JavaScript APIs for building Word add-ins

PowerPoint API reference
JavaScript APIs for building PowerPoint add-ins

OneNote API reference
JavaScript APIs for building OneNote add-ins

Common API reference
JavaScript APIs that can be used by any Office Add-in