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open! Import
class type performanceObserverInit =
object
method entryTypes : Js.js_string Js.t Js.js_array Js.t Js.writeonly_prop
end
class type performanceEntry =
object
method name : Js.js_string Js.t Js.readonly_prop
method entryType : Js.js_string Js.t Js.readonly_prop
method startTime : float Js.readonly_prop
method duration : float Js.readonly_prop
end
class type performanceObserverEntryList =
object
method getEntries : performanceEntry Js.t Js.js_array Js.t Js.meth
end
class type performanceObserver =
object
method observe : performanceObserverInit Js.t -> unit Js.meth
method disconnect : unit Js.meth
method takeRecords : performanceEntry Js.t Js.js_array Js.t Js.meth
end
let performanceObserver = Js.Unsafe.global##._PerformanceObserver
let is_supported () = Js.Optdef.test performanceObserver
let performanceObserver :
( (performanceObserverEntryList Js.t -> performanceObserver Js.t -> unit) Js.callback
-> performanceObserver Js.t)
Js.constr =
performanceObserver
let observe ~entry_types ~f =
let entry_types = entry_types |> List.map Js.string |> Array.of_list |> Js.array in
let performance_observer_init : performanceObserverInit Js.t = Js.Unsafe.obj [||] in
let () = performance_observer_init##.entryTypes := entry_types in
let obs = new%js performanceObserver (Js.wrap_callback f) in
let () = obs##observe performance_observer_init in
obs
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