PointerEvent: altitude angle property
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The altitude angle
read-only property of the PointerEvent
interface represents the angle between a transducer (a pointer or stylus) axis and the X-Y plane of a device screen.
The altitude angle describes whether the transducer is perpendicular to the screen, parallel, or at some angle in between.
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 4 in the specification.
Value
An angle in radians between 0
and π/2
where 0
is parallel to the device surface (X-Y plane), and π/2
is perpendicular to the surface.
Defaults to π/2
(perpendicular to the surface) which differs from the altitudeAngle
in touch events which defaults to 0
(parallel to the surface).
For hardware and platforms that do not report tilt or angle, the value is π/2
.
Example
js
someElement.addEventListener(
"pointerdown",
(event) => {
process_angles(event.altitudeAngle, event.azimuthAngle);
},
false
);
Specifications
Specification |
---|
Pointer Events # dom-pointerevent-altitudeangle |
Browser compatibility
BCD tables only load in the browser