during panning, editor does not follow mouse cursor when it's outside of the element

See the screen recording below. Perhaps this could be fixed by using setPointerCapture() when dragging begins?

https://developer.mozilla.org/en-US/docs/Web/API/Element/setPointerCapture

https://user-images.githubusercontent.com/93272954/171086151-e9661fbb-13ad-4cc6-9af1-fba5669c63e4.mov

[jerosoler]

Wow! Work correct! 😉

I did not know this method. It is very simple to implement:

    editor.pointerdown = (e) => {
        editor.container.onpointermove = editor.position(e);
        editor.container.setPointerCapture(e.pointerId);
    } 
    editor.pointerup = (e) => {
        editor.container.onpointermove = null;
        editor.container.releasePointerCapture(e.pointerId);
    } 

    editor.container.addEventListener('pointerdown', editor.pointerdown);
    editor.container.addEventListener('pointerup', editor.pointerup); 

[jerosoler]

so why are we nulling out editor.container.onpointermove?

It is passed to null. Because once the mouse is up there is no reason to pass the position function.

You can see more at https://developer.mozilla.org/en-US/docs/Web/API/Element/setPointerCapture