web api instance property
PointerEvent: tiltX property
The tiltX read-only property of the PointerEvent interface is the angle (in degrees) between the Y-Z plane of the pointer and the screen.
This property is typically only useful for a pen/stylus pointer type.
Depending on the specific hardware and platform, user agents will likely only receive one set of values for the transducer orientation relative to the screen plane — either tiltX and tiltY or altitudeAngle and azimuthAngle.
For an additional illustration of this property see Figure 2 in the specification.
Value
The angle in degrees between the Y-Z plane of the pointer (stylus) and the screen. The range of values is -90 to 90, inclusive, where a positive value is a tilt to the right.
For devices that do not support this property, the value is 0.
Examples
This example illustrates simple accessing of the tiltX and tiltY properties.
someElement.addEventListener("pointerdown", (event) => {
processTilt(event.tiltX, event.tiltY);
});