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Implement something Pointer/Mouse Lock

I would like to hide the mouse during my experiment and I also need to reset the position of the mouse in certain trials. I read that mouse.setPos() is actually not available in PsychoJS.

Would it be possible to implement something like a Pointer/Mouse lock by adding custom JS to my experiment? Something like what is described here:

Here is a demo from the firefox API (

I’ve not tested on Pavlovia yet but if you can use mouse = event.Mouse(visible=False) then you should be able to display a replacement pointer at a given offset from where the mouse really is.

I wrote a game on PsychoPy using this in 2017 – I’ve just checked and it still works locally so I’ll upload it to Pavlovia at some point.