[Bug]: Electron setContentBounds / setContentSize doesn't work

[brondibur]

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a bug report that matches the one I want to file, without success.

Electron Version

30.0.4

What operating system are you using?

macOS

Operating System Version

macOS Sonoma 14.4.1

What arch are you using?

arm64 (including Apple Silicon)

Last Known Working Electron version

No response

Expected Behavior

setContentBounds / setContentSize resize the contents relative to the window.

Actual Behavior

setContentBounds / setContentSize actually behave like setBounds and set the bounds of the entire window instead of the contents within it.

Testcase Gist URL

https://gist.github.com/brondibur/f063baec603e95a206a3e69afafd32a1

Additional Information

In the Fiddle Gist, setContentBounds({ x: 10, y: 10, width: 400, height: 300 }) should set the contents as 400x300 originating from (10, 10) within the 800x600 window, whereas it converts the BrowserWindow to 400x300 that originates from (10, 10) of the screen.
Same goes for setContentSize

[brondibur]

Hi @codebytere

Bug reports for this issue have been incorrectly closed multiple times (#41665, #33969, #23758).

Can you please take a look?

[codebytere]

This unfortunately has never worked as you expect - we should probably reclassify this as a feature request or otherwise decide what to do with those functions.

[codebytere]

@brondibur following up on this - it was never intended to work that way. It resizes the window bounds according to then content area, but it never resized content without affecting window bounds at all. You can use webContentsView to do what you want.