PointerEvent

The altitudeAngle 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.

The MouseEvent.altKey read-only property is a boolean value that indicates whether the alt key was pressed or not when a given mouse event occurs.

The azimuthAngle read-only property of the PointerEvent interface represents the angle between the Y-Z plane and the plane containing both the transducer (pointer or stylus) axis and the Y axis.

The MouseEvent.button read-only property indicates which button was pressed or released on the mouse to trigger the event.

The MouseEvent.buttons read-only property indicates which buttons are pressed on the mouse (or other input device) when a mouse event is triggered.

The clientX read-only property of the MouseEvent interface provides the horizontal coordinate within the application's viewport at which the event occurred (as opposed to the coordinate within the page).

The clientY read-only property of the MouseEvent interface provides the vertical coordinate within the application's viewport at which the event occurred (as opposed to the coordinate within the page).

The MouseEvent.ctrlKey read-only property is a boolean value that indicates whether the ctrl key was pressed or not when a given mouse event occurs.

The UIEvent.detail read-only property, when non-zero, provides the current (or next, depending on the event) click count.

The height read-only property of the PointerEvent interface represents the height of the pointer's contact geometry, along the y-axis (in CSS pixels). Depending on the source of the pointer device (for example a finger), for a given pointer, each event may produce a different value.

The isPrimary read-only property of the PointerEvent interface indicates whether or not the pointer device that created the event is the primary pointer. It returns true if the pointer that caused the event to be fired is the primary one and returns false otherwise.

The MouseEvent.layerX read-only property returns the horizontal coordinate of the event relative to the current layer.

The MouseEvent.layerY read-only property returns the vertical coordinate of the event relative to the current layer.

The MouseEvent.metaKey read-only property is a boolean value that indicates whether the meta key was pressed or not when a given mouse event occurs.

The movementX read-only property of the MouseEvent interface provides the difference in the X coordinate of the mouse pointer between the given event and the previous mousemove event. In other words, the value of the property is computed like this: currentEvent.movementX = currentEvent.screenX - previousEvent.screenX.

The movementY read-only property of the MouseEvent interface provides the difference in the Y coordinate of the mouse pointer between the given event and the previous mousemove event. In other words, the value of the property is computed like this: currentEvent.movementY = currentEvent.screenY - previousEvent.screenY.

The offsetX read-only property of the MouseEvent interface provides the offset in the X coordinate of the mouse pointer between that event and the padding edge of the target node.

The offsetY read-only property of the MouseEvent interface provides the offset in the Y coordinate of the mouse pointer between that event and the padding edge of the target node.

The pageX read-only property of the MouseEvent interface returns the X (horizontal) coordinate (in pixels) at which the mouse was clicked, relative to the left edge of the entire document. This includes any portion of the document not currently visible.

The pageY read-only property of the MouseEvent interface returns the Y (vertical) coordinate (in pixels) at which the mouse was clicked, relative to the top edge of the entire document. This includes any portion of the document not currently visible.

The persistentDeviceId read-only property of the PointerEvent interface is a unique identifier for the pointing device generating the PointerEvent. This provides a secure, reliable way to identify multiple pointing devices (such as pens) interacting with the screen simultaneously.

The pointerId read-only property of the PointerEvent interface is an identifier assigned to the pointer that triggered the event. The identifier is unique, being different from the identifiers of all other active pointer events.

The pointerType read-only property of the PointerEvent interface indicates the device type (mouse, pen, or touch) that caused a given pointer event.

The pressure read-only property of the PointerEvent interface indicates the normalized pressure of the pointer input.

The MouseEvent.relatedTarget read-only property is the secondary target for the mouse event, if there is one.

The screenX read-only property of the MouseEvent interface provides the horizontal coordinate (offset) of the mouse pointer in screen coordinates.

The screenY read-only property of the MouseEvent interface provides the vertical coordinate (offset) of the mouse pointer in screen coordinates.

The MouseEvent.shiftKey read-only property is a boolean value that indicates whether the shift key was pressed or not when a given mouse event occurs.

The tangentialPressure read-only property of the PointerEvent interface represents the normalized tangential pressure of the pointer input (also known as barrel pressure or cylinder stress).

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.

The tiltY read-only property of the PointerEvent interface is the angle (in degrees) between the X-Z plane of the pointer and the screen. This property is typically only useful for a pen/stylus pointer type.

The twist read-only property of the PointerEvent interface represents the clockwise rotation of the pointer (e.g., pen stylus) around its major axis, in degrees.

The UIEvent.view read-only property returns the WindowProxy object from which the event was generated. In browsers, this is the Window object the event happened in.

The width read-only property of the PointerEvent interface represents the width of the pointer's contact geometry along the x-axis, measured in CSS pixels. Depending on the source of the pointer device (such as a finger), for a given pointer, each event may produce a different value.

The MouseEvent.x property is an alias for the MouseEvent.clientX property.

The MouseEvent.y property is an alias for the MouseEvent.clientY property.

The getCoalescedEvents() method of the PointerEvent interface returns a sequence of PointerEvent instances that were coalesced (merged) into a single pointermove or pointerrawupdate event. Instead of a stream of many pointermove events, user agents coalesce multiple updates into a single event. This helps with performance as the user agent has less event handling to perform, but there is a reduction in the granularity and accuracy when tracking, especially with fast and large movements. Available only in secure contexts.

The MouseEvent.getModifierState() method returns the current state of the specified modifier key: true if the modifier is active (i.e., the modifier key is pressed or locked), otherwise, false.

The getPredictedEvents() method of the PointerEvent interface returns a sequence of PointerEvent instances that are estimated future pointer positions. How the predicted positions are calculated depends on the user agent, but they are based on past points, current velocity, and trajectory.