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enable-debugging-on-edge-devtools.md

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When the add-in is running in Microsoft Edge, "UI-less" code will not be able to attach to a debugger by default. UI-less code is any code running while the task pane is not visible, such as function commands. To enable debugging, you need to run the following Windows PowerShell commands.

  1. Run the following command to get information for the Microsoft.Win32WebViewHost app package.

    Get-AppxPackage Microsoft.Win32WebViewHost

    The command lists app package information similar to the following output.

    Name              : Microsoft.Win32WebViewHost
Publisher         : CN=Microsoft Windows, O=Microsoft Corporation, L=Redmond, S=Washington, C=US
Architecture      : Neutral
ResourceId        : neutral
Version           : 10.0.18362.449
PackageFullName   : Microsoft.Win32WebViewHost_10.0.18362.449_neutral_neutral_cw5n1h2txyewy
InstallLocation   : C:\Windows\SystemApps\Microsoft.Win32WebViewHost_cw5n1h2txyewy
IsFramework       : False
PackageFamilyName : Microsoft.Win32WebViewHost_cw5n1h2txyewy
PublisherId       : cw5n1h2txyewy
IsResourcePackage : False
IsBundle          : False
IsDevelopmentMode : False
NonRemovable      : True
IsPartiallyStaged : False
SignatureKind     : System
Status            : Ok

  2. Run the following command to enable debugging. Use the value for the PackageFullName listed from the previous command.

    setx JS_DEBUG <PackageFullName>

  3. If Office was already running, close and restart Office so that it picks up the debugging change.