[Problem/Bug]: CoreWebView2WindowFeatures/ICoreWebView2WindowFeatures returning invalid values for top and left when provided with negative values in window.open()

[mikamikem]

What happened?

The top and left values on ICoreWebView2WindowFeatures and CoreWebView2WindowFeatures appear to be signed integer values that are simply cast to unsigned integer values. If a website uses negative values (which should be invalid for these properties), the values returned are not uint.MaxValue as the docs specify, but a very large uint value that corresponds to the negative value cast to a uint.

Importance

Important. My app's user experience is significantly compromised.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

126.0.2544.0

SDK Version

1.0.1722.45

Framework

WPF

Operating System

Windows 10

OS Version

19045.4355

Repro steps

1. Go to https://javascript.info/popup-windows#example-a-minimalistic-window
2. Click the run button on the first example to open a popup with a negative left and top value.
3. Observe the values returned by CoreWebView2WindowFeatures.Top and CoreWebView2WindowFeatures.Left.

Expected:
Both values should be uint.MaxValue because negative values are invalid for these fields.

Observed
Values are uint.MaxValue - 1000 + 1 which is the signed integer value of -1000 used in the example.

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Don't know

Last working version (if regression)

No response

AB#46380638

[johna-ms]

Thanks for reporting this! I can repro this and am adding it to our backlog