how to save the game file on the client so its just download the game once

Sorry if i didnt explain me well, but when you come up with big games, its kinda slow to wait for a download every time you want to play the game… THanks

UE4 js files are cached in browser like any other www content. I’ve also successfuly used “HTML5/Download maps on the fly [experimental]” feature accessed in Project Settings.