[InitializedByEventConstructor] readonly attribute boolean metaKey;
[InitializedByEventConstructor] readonly attribute unsigned short button;
[InitializedByEventConstructor] readonly attribute EventTarget? relatedTarget;
- readonly attribute long webkitMovementX;
- readonly attribute long webkitMovementY;
+ [MeasureAs=PrefixedMouseEventMovementX] readonly attribute long webkitMovementX;
+ [MeasureAs=PrefixedMouseEventMovementY] readonly attribute long webkitMovementY;
void initMouseEvent([Default=Undefined] optional DOMString type,
[Default=Undefined] optional boolean canBubble,