Dom_html.DomStringMapTyped access to domStringMap (the type of Element.dataset).
val get : domStringMap Js.t -> Js.js_string Js.t -> Js.js_string Js.t Js.optdefget m k is the value stored under key k, or undefined if absent.
val set : domStringMap Js.t -> Js.js_string Js.t -> Js.js_string Js.t -> unitset m k v sets k to v.
val remove : domStringMap Js.t -> Js.js_string Js.t -> unitremove m k deletes the k entry.