| Argument | Type | Default |
| typeArg | DOM.DOMString | |
| canBubbleArg | bool | |
| cancelableArg | bool | |
| viewArg | DOM.AbstractView | |
| detailArg | long | |
| screenXArg | long | |
| screenYArg | long | |
| clientXArg | long | |
| clientYArg | long | |
| ctrlKeyArg | bool | |
| altKeyArg | bool | |
| shiftKeyArg | bool | |
| metaKeyArg | bool | |
| buttonArg | ushort | |
| relatedTargetArg | DOM.Node | |
| |