`inherit mouseEvent`
`method wheelDelta : int Js_of_ocaml__.Js.readonly_prop`
`method wheelDeltaX : int Js_of_ocaml__.Js.optdef Js_of_ocaml__.Js.readonly_prop`
`method wheelDeltaY : int Js_of_ocaml__.Js.optdef Js_of_ocaml__.Js.readonly_prop`
`method deltaX : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.readonly_prop`
`method deltaY : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.readonly_prop`
`method deltaZ : Js_of_ocaml__.Js.number_t Js_of_ocaml__.Js.readonly_prop`
`method deltaMode : delta_mode Js_of_ocaml__.Js.readonly_prop`