Macbook trackpad for scaling and parallel movement

I want to use two-finger gestures on the trackpad to move an object in the browser up/down, left/right, and zoom in/out.

Conclusion.

These operations are communicated to the browser in the wheel event.

deltaX, deltaY contain the amount of vertical and horizontal movement

ctrlKey: true for pinch

The wheel event is PASSIVE by default, so to stop the browser's default clone operation, you must first turn PASSIVE off.

window.addEventListener("wheel", onWheel, { passive: false });

---memo

Parallel movement on Macbook touch screen

Wheel events have X and Y.

(Z is also available)

ctrlKey: true for pinch

Seriously? (It was serious.)

---