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Custom functions enable you to add new functions to Excel by defining those functions in JavaScript as part of an add-in. Users within Excel can access custom functions just as they would any native function in Excel, such asSUM().

This repository contains the source code used by theYo Office generator when you create a new custom functions project. You can also use this repository as a sample to base your own custom functions project from if you choose not to use the generator. For more detailed information about custom functions in Excel, see theCustom functions overview article in the Office Add-ins documentation or see theadditional resources section of this repository.

This template supports debugging custom functions fromVisual Studio Code. For more information seeCustom functions debugging. For general information on debugging task panes and other Office Add-in parts, seeTest and debug Office Add-ins.

We'd love to get your feedback about this sample. You can send your feedback to us in theIssues section of this repository.

Questions about Office Add-ins development in general should be posted toMicrosoft Q&A. If your question is about the Office JavaScript APIs, make sure it's tagged with [office-js-dev].

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• Custom functions overview
• Custom functions best practices
• Custom functions runtime
• Office Add-ins documentation
• Office Add-ins samples

This project has adopted theMicrosoft Open Source Code of Conduct. For more information, see theCode of Conduct FAQ or contactopencode@microsoft.com with any additional questions or comments.

Copyright (c) 2019 Microsoft Corporation. All rights reserved.