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StateObserver Mod pour Minecraft 1.21.1

A library for observing blockstate changes.

à partir de Favouriteless · Modrinth
Sur le serveur
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Mis à jour 23.10.2026

À propos du mod StateObserver

StateObserver is a very small and lightweight library for observing blockstate changes across a large area without a large performance hit.

If you're a player, don't worry about this mod! It's just a library for developers to use.

Comment installer StateObserver

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.21.1 on Fabric or NeoForge automatically, together with its dependencies: Fabric API.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Fabric or NeoForge

    The loader must match the game version of the mod file, for example Minecraft 1.21.1. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file stateobserver-neoforge-1.21.1-1.6.4.jar (14 KB) for your game version and loader.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it. Required dependencies go there too: Fabric API.

  4. Launch the loader profile

    Open “Mods” in the main menu: StateObserver should be in the list.

On a server

  1. A server on Fabric or NeoForge

    The mod only works on a server with the same loader and game version, for example 1.21.1.

  2. File goes into the server’s mods folder

    Stop the server, put the mod file into the mods folder and start the server again.

  3. Use the “To server” button

    On Millida Hosting, the button at the top of the page uploads the file to your server and restarts it for you.

Minecraft 1.21.1 runs on Java 21: with a different Java version the game may close right after launch.

Versions

Avec dépendances

MinecraftLoaderFichierDateActions
1.21.1NeoForge1.21.114.1 Ko
1.21.1Fabric1.21.114.7 Ko
1.21.1NeoForge1.21.114.1 Ko
1.21.1Fabric1.21.114.7 Ko
1.21.1NeoForge1.21.114.1 Ko
1.21.1Fabric1.21.114.7 Ko
1.21.1NeoForge1.21.113.5 Ko
1.21.1Fabric1.21.114.1 Ko

Ce qu'il faut pour l'exécuter

FAQ

Which Minecraft versions does StateObserver work on?

Only Minecraft 1.21.1: there are no files for other versions.

Is StateObserver for Forge or Fabric?

There are files for Fabric: 1.21.1 and for NeoForge: 1.21.1. There are no files for Forge: a mod for another loader will not start.

What does StateObserver need to work?

Required: Fabric API. Without it the mod will not start: dependencies go into the same mods folder.

Does StateObserver work on a server?

Yes. StateObserver works both in singleplayer and on a server.

Which Java does StateObserver need?

Minecraft 1.21.1 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.

Where can I download StateObserver safely?

On this page: the file stateobserver-neoforge-1.21.1-1.6.4.jar (14 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 97223bb9d8099e513b7bc8212b23cfdcce1b4059.

Avis

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Auteur : FavouritelessLicence : LGPL-3.0-or-laterCode source

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