`method alpha : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method depth : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method stencil : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method antialias : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method premultipliedAlpha : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method preserveDrawingBuffer : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method preferLowPowerToHighPerformance : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`
`method failIfMajorPerformanceCaveat : bool Js_of_ocaml__.Js.t Js_of_ocaml__.Js.prop`