ServiceWorker.navigationPreloadManagerManages navigation preloading for a serviceWorkerRegistration, exposed as its navigationPreload.
method setHeaderValue : Js_of_ocaml__.Js.js_string Js_of_ocaml__.Js.t ->
unit Js_of_ocaml__.Promise.t Js_of_ocaml__.Js.methSets the value sent in the Service-Worker-Navigation-Preload request header for preload requests.
method getState : navigationPreloadState Js_of_ocaml__.Js.t
Js_of_ocaml__.Promise.t
Js_of_ocaml__.Js.meth