Two TaskPane created on OneNote

[Acibi]

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Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: OneNote on the Web
• Host [Excel, Word, PowerPoint, etc.]: OneNote
• Office version number: 16.0.18624.41001
• Operating System: Mac
• Browser (if using Office on the web): Google Chrome

Expected behavior

Upon displaying the TaskPane, OneNote should create only one <iframe>.

Current behavior

When displaying the TaskPane for the second or any subsequent calls, OneNote creates two <iframe> if there is a TaskPaneID define in the manifest.

Steps to reproduce:

1. Have a AddIn with a button with a TaskPane action with TaskPaneID defined.
2. Display the TaskPane.
3. Close the TaskPane
4. Display the TaskPane again

Every time the TaskPane is displayed, two <iframe> instances are created and both are cleared when the TaskPane is closed.

By omitting the TaskPaneID from the action in the manifest, only one <iFrame> is created.

[github-actions]

Here are some similar issues that might help you. Please check if they can solve your problem.

• OneNote web add-in opens two iframes in taskpane when taskpane button is pressed twice #4686

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Possible solution (Extracted from existing issue, might be incorrect; please verify carefully)

Solution 1:

This is a bug (9216582). We will track it and post updates here once available. Thank you for reporting this issue!

Reference:

• OneNote web add-in opens two iframes in taskpane when taskpane button is pressed twice #4686 (comment)

Solution 2:

If you want to close the task pane, you'll need to click on the x on the upper right of the add-in. Clicking on the ribbon button for the add-in won't close the task pane.

Reference:

• OneNote web add-in opens two iframes in taskpane when taskpane button is pressed twice #4686 (comment)

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[mattgeim]

@EsterBergen can you take a look please?

[EsterBergen]

Hi- @Acibi - do you know if this still repros?