UIDragger.onDrag() not triggering in Firefox and Safari

[leoxiong]

The ui.track demo does not seem to work on Firefox and Safari on macOS. Dragging on the red circles do not move them.

macOS Sonoma 14.5
Firefox 127.0.1
Safari 17.5

Another test script I wrote also doesn't log any messages.

    <div id="canvas"></div>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/pts/0.12.9/pts.min.js"></script>
    <script>
        Pts.namespace(this)

        const rects = []

        new CanvasSpace('#canvas').setup({bgcolor: 'transparent', retina: true}).add({
            start: (bound, space) => {
                const rect = UIDragger.fromRectangle([[100, 100], [0, 0]])
                rect.onDrag((target, pt) => {
                    console.log('ondrag')
                })
                rects.push(rect)
            },
            animate: (time, ftime, space) => {
                const form = space.getForm()

                form.fillOnly('#0c6')
                rects.forEach((rect) => {
                    rect.render(group => form.rect(group))
                })
            },
            action: (type, x, y, event) => {
                UI.track(rects, type, new Pt(x, y), event)
            },
        }).bindMouse().play()
    </script>

However using .on('drag', ...) does work.

const rect = UI.fromRectangle([[100, 100], [0, 0]])
rect.on('drag', (target, pt, type, event) => {
    console.log('drag')
})