(* Js_of_ocaml library
 * http://www.ocsigen.org/js_of_ocaml/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, with linking exception;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *)

(** The Intersection Observer API provides a way to asynchronously observe
    changes in the intersection of a target element with an ancestor element or
    with a top-level document's viewport.

    https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API *)

class type intersectionObserverEntry = object
  method target : Dom.node Js.t Js.readonly_prop

  method boundingClientRect : Dom_html.clientRect Js.t Js.readonly_prop

  method rootBounds : Dom_html.clientRect Js.t Js.opt Js.readonly_prop

  method intersectionRect : Dom_html.clientRect Js.t Js.readonly_prop

  method intersectionRatio : Js.number_t Js.readonly_prop

  method isIntersecting : bool Js.t Js.readonly_prop

  method time : Js.number_t Js.readonly_prop
end

class type intersectionObserverOptions = object
  method root : Dom.node Js.t Js.writeonly_prop

  method rootMargin : Js.js_string Js.t Js.writeonly_prop

  method threshold : Js.number_t Js.js_array Js.t Js.writeonly_prop
end

class type intersectionObserver = object
  method root : Dom.node Js.t Js.opt Js.readonly_prop

  method rootMargin : Js.js_string Js.t Js.readonly_prop

  method thresholds : Js.number_t Js.js_array Js.t Js.readonly_prop

  method observe : #Dom.node Js.t -> unit Js.meth

  method unobserve : #Dom.node Js.t -> unit Js.meth

  method disconnect : unit Js.meth

  method takeRecords : intersectionObserverEntry Js.t Js.js_array Js.t Js.meth
end

val empty_intersection_observer_options : unit -> intersectionObserverOptions Js.t

val is_supported : unit -> bool

val intersectionObserver :
  (   (   intersectionObserverEntry Js.t Js.js_array Js.t
       -> intersectionObserver Js.t
       -> unit)
      Js.callback
   -> intersectionObserverOptions Js.t
   -> intersectionObserver Js.t)
  Js.constr
