Readonly altReturns true if the alt key was down when the mouse event was fired.
Readonly buttonThe button number that was pressed (if applicable) when the mouse event was fired.
Readonly buttonsThe buttons being depressed (if any) when the mouse event was fired.
Readonly clientXThe X coordinate of the mouse pointer in local (DOM content) coordinates.
Readonly clientYThe Y coordinate of the mouse pointer in local (DOM content) coordinates.
Readonly ctrlReturns true if the control key was down when the mouse event was fired.
Readonly detailReturns a long with details about the event, depending on the event type.
Readonly heightThe height (magnitude on the Y axis), in CSS pixels, of the contact geometry of the pointer.
Readonly isIndicates if the pointer represents the primary pointer of this pointer type.
Readonly metaReturns true if the meta key was down when the mouse event was fired.
Readonly offsetXThe X coordinate of the mouse pointer between that event and the padding edge of the target node
Readonly offsetYThe Y coordinate of the mouse pointer between that event and the padding edge of the target node
Readonly pageXThe X coordinate of the mouse pointer relative to the whole document.
Readonly pageYThe Y coordinate of the mouse pointer relative to the whole document.
Readonly pointerA unique identifier for the pointer causing the event.
Readonly pointerIndicates the device type that caused the event (mouse, pen, touch, etc.)
Readonly pressureThe normalized pressure of the pointer input in the range 0 to 1, where 0 and 1 represent the minimum and maximum pressure the hardware is capable of detecting, respectively.
Readonly relatedThe secondary target for the event, if there is one.
Readonly screenXThe X coordinate of the mouse pointer in global (screen) coordinates.
Readonly screenYThe Y coordinate of the mouse pointer in global (screen) coordinates.
Readonly shiftReturns true if the shift key was down when the mouse event was fired.
Readonly tangentialThe normalized tangential pressure of the pointer input (also known as barrel pressure or cylinder stress) in the range -1 to 1, where 0 is the neutral position of the control.
Readonly tiltXThe plane angle (in degrees, in the range of -90 to 90) between the Y–Z plane and the plane containing both the pointer (e.g. pen stylus) axis and the Y axis.
Readonly tiltYThe plane angle (in degrees, in the range of -90 to 90) between the X–Z plane and the plane containing both the pointer (e.g. pen stylus) axis and the X axis.
Readonly twistThe clockwise rotation of the pointer (e.g. pen stylus) around its major axis in degrees, with a value in the range 0 to 359.
Readonly widthThe width (magnitude on the X axis), in CSS pixels, of the contact geometry of the pointer
Readonly xAlias for NativeMouseEvent.clientX
Readonly yAlias for NativeMouseEvent.clientY
https://developer.mozilla.org/en-US/docs/Web/API/PointerEvent