`object ('a)
method onabort :
('a Js.t, 'a File.progressEvent Js.t) Dom.event_listener
Js.writeonly_prop
method onerror :
('a Js.t, 'a File.progressEvent Js.t) Dom.event_listener
Js.writeonly_prop
method onload :
('a Js.t, 'a File.progressEvent Js.t) Dom.event_listener
Js.writeonly_prop
method onloadend :
('a Js.t, 'a File.progressEvent Js.t) Dom.event_listener
Js.writeonly_prop
method onloadstart :
('a Js.t, 'a File.progressEvent Js.t) Dom.event_listener
Js.writeonly_prop
method onprogress :
('a Js.t, 'a File.progressEvent Js.t) Dom.event_listener
Js.writeonly_prop
end`