MOUSE_MODE_CONFINED_HIDDEN doesn't work on the web platform

[ahopness]

Tested versions

• Reproduced in: 4.3.stable & 4.2.2.stable.

System information

Windows 10 - Chrome 128 - Godot 4.3.stable - Compatibility

Issue description

My game is using Input.mouse_mode = MOUSE_MODE_CONFINED_HIDDEN because you're suposed to move your cursor a lot inside of it. The mode doesn't seem to work on web, it doesnt hide or confine the cursor.
I don't know if this is on pourpouse - it might be -but if it is, it's undocumented.

On windows (working correctly)

On web (not working)

Is there a way to fix this?

Steps to reproduce

How to test the MRP

1. Play the project both on windows and the web
2. Open 'main.gd' file and uncomment line 7
3. Play again both on windows and the web (it won't work on the web)

Minimal reproduction project (MRP)

mouse_filter_test.zip

[tehsquidge]

Hey,

I had a little look at the source and found this:

godot/platform/web/display_server_web.cpp

Line 554 in 44fa552

ERR_FAIL_COND_MSG(p_mode == MOUSE_MODE_CONFINED || p_mode == MOUSE_MODE_CONFINED_HIDDEN, "MOUSE_MODE_CONFINED is not supported for the Web platform.");

MOUSE_MODE_CONFINED_HIDDEN isn't supported on web. The error message here could probably be clearer as it only mentions MOUSE_MODE_HIDDEN and fails to mention MOUSE_MODE_CONFINED_HIDDEN.

An immediate solution for you might to do something like this:
Input.mouse_mode = Input.MOUSE_MODE_HIDDEN if OS.get_name() == "Web" else Input.MOUSE_MODE_CONFINED_HIDDEN

I'm happy to do any work on improving the error message or documentation if I can get some direction on it.

Would it make sense for MOUSE_MODE_CONFINED_HIDDEN to fallback to MOUSE_MODE_HIDDEN on Web?

Cheers!