If necessary, downloads the unpatched Minecraft game, so that Fabric can be used with it.Automatically downloads the latest Fabric loader version for your version of the game, with no required configuration.Loads Fabric (or a different configured mod loader) instead of Forge, from a Forge installation.Warning: This mod will stop Forge mods from loading! Make sure you back up before you join worlds where you have used Forge mods previously - as all the blocks/items added by those mods will disappear. It only loads if your game was launched from Forge/ModLauncher, so it won't do anything if your Minecraft launcher already supports Fabric. Jumploader is fully configurable to download any Minecraft version and mod loader, but by default it will download the Fabric loader and library versions corresponding to your current version of the game. It works on both the client and server, however it's only necessary on the server if you want to launch the game using tools that only support Forge. Jumploader is a mod that allows the use of Fabric mods in Twitch modpacks, by loading Fabric as if it were a Forge mod.