`method identifier : int Js_of_ocaml__.Js.readonly_prop`
`method target : element Js_of_ocaml__.Js.t Js_of_ocaml__.Js.optdef Js_of_ocaml__.Js.readonly_prop`
`method screenX : int Js_of_ocaml__.Js.readonly_prop`
`method screenY : int Js_of_ocaml__.Js.readonly_prop`
`method clientX : int Js_of_ocaml__.Js.readonly_prop`
`method clientY : int Js_of_ocaml__.Js.readonly_prop`
`method pageX : int Js_of_ocaml__.Js.readonly_prop`
`method pageY : int Js_of_ocaml__.Js.readonly_prop`