Office-JS Exception when setting underlined font property on PowerPoint for Mac Version 16.94 (25020927) - worked in 16.93

[David-Mueller]

Office-JS Exception when setting underlined font property

It is not possible to set the "font.underline" property with the latest PowerPoint and office-js versions when running on the "Mac" platform.

Your Environment

• Platform [PC desktop, Mac, iOS, Office on the web]: Mac
• Host [Excel, Word, PowerPoint, etc.]: PowerPoint
• Office version number: 16.94 (25020927)
• Operating System: MacOS 15.3 (24D60)
• Browser (if using Office on the web): native desktop app

Expected behavior

The underline style can be set.

Current behavior

Exception thrown when setting the underline property to "None":

InvalidArgument
errorLocation: "ShapeFont.underline"
statement: "font.underline = ...;"

Steps to reproduce

1. Run this code with a non-empty text element shape selected:

    PowerPoint.run(async (context) => {
        const shapes = context.presentation.getSelectedShapes()
        shapes.load("items")
        await context.sync()

        for (const shape of shapes.items) {
            shape.load("textFrame")
            await context.sync()

            const textFrame = shape.textFrame
            textFrame.load("textRange")
            await context.sync()

            const textRange = textFrame.textRange
            textRange.load("font")
            await context.sync()

            textRange.font.underline = "None"
            await context.sync()
        }
    })

Link to live example(s)

not available publicly

Provide additional details

The issue seems to only affect Mac.

Context

We are developing an office js-based PowerPpint Addin.

Useful logs

• Console errors
• Screenshots
• Test file (if only happens on a particular file)

Thank you for taking the time to report an issue. Our triage team will respond to you in less than 72 hours. Normally, response time is <10 hours Monday through Friday. We do not triage on weekends.

[zartinn]

This worked on 16.93 before! This bug was introduced with the newest PowerPoint update to 16.94.

There are at least a couple of new bugs introduced with 16.94. Here a different bug that got introduced:
#5390