Downloads the latest Minecraft client & connects to a Minecraft server:

LaunchCraft.load(function() {
  LaunchCraft.downloadMinecraft(function() {
    LaunchCraft.launch("username", "password", "example.com");
  });
});

LaunchCraft.js uses a signed Java applet to achieve the elevated privileges it needs to download & run Minecraft. To generate a public/private key pair and self-signed certificate, use the following command:

$ keytool -genkey -alias signFiles -keystore keystore.db

You can then build & sign LaunchCraft.jar:

$ make sign