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Overview of debugging Office Add-ins

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Debugging Office Add-ins is essentially the same as debugging any web application. However, a single set of tools won't work for all add-in developers. This is because add-ins can be developed on different operating systems and run cross-platform. This article helps you find the detailed debugging guidance for your development environment.

Tip

This article is concerned with debugging in the narrow sense of setting breakpoints and stepping through code. For guidance on testing and troubleshooting, start with Test Office Add-ins and Troubleshoot development errors with Office Add-ins.

Note

Although you should test your add-in on all the platforms that you want to support, you'll only very rarely need to debug on an environment different from your development computer. For this reason, this article uses "your development computer" and "your development environment" to refer to the environment on which you're debugging. If a problem in the code occurs only on a platform other than the one on your development computer, and you need to set breakpoints or step through code to solve it, then the environment on which you're debugging isn't literally your development environment.

Server-side or client-side?

Debugging the server-side code of an Office Add-in is the same as debugging the server-side of any web application. See the debugging instructions for your IDE or other tools. The following are examples for some of the most popular tools.

The rest of this article is concerned only with debugging client-side JavaScript (which may be transpiled from TypeScript).

Special cases

There are some special cases in which the debugging process differs from normal for a given combination of platform, Office application, and development environment. If you're debugging any of these special cases, use the links in this section to find the proper guidance. Otherwise, continue to General guidance.

General guidance

To find guidance for debugging client-side code, the first variable is the operating system of your development computer.

Debug on Windows

The following provides general guidance to debugging on Windows. Debugging on Windows depends on your IDE.

For information about which runtime is being used, see Browsers and webview controls used by Office Add-ins and Runtimes in Office Add-ins.

Tip

In recent versions of Office, one way to identify the webview control that Office is using is through the personality menu on any add-in where it's available. (The personality menu isn't supported in Outlook.) Open the menu and select Security Info. In the Security Info dialog on Windows, the Runtime reports Microsoft Edge, Microsoft Edge Legacy, or Internet Explorer. The runtime isn't included on the dialog in older versions of Office.

Debug on Mac

Use the Safari Web Inspector. Instructions are in Debug Office Add-ins on a Mac.

Debug on Linux

There is no desktop version of Office for Linux, so you'll need to sideload the add-in to Office on the web to test and debug it. Debugging guidance is in Debug add-ins in Office on the web.

Note

We don't recommend that you develop Office Add-ins on a Linux computer except in the unusual case where you can be sure that all the add-in's users will be accessing the add-in through Office on the web from a Linux computer.

Debug add-ins in staging or production

To debug an add-in that is already in staging or production, attach a debugger from the UI of the add-in. For instructions, see Attach a debugger from the task pane.

See also