NoBadBooms

NoBadBooms!

A server-side NeoForge 1.21.1 mod that adds a tntExplodes gamerule, similar to
Bedrock Edition, letting you stop TNT from destroying blocks.

Usage

/gamerule tntExplodes false

When false, TNT blocks and TNT minecarts still ignite and detonate (fuse, sound,
particles, knockback, and entity damage all still happen), but **no blocks are
destroyed**. Default is true (vanilla behavior).

The rule is per-world and saved like any vanilla gamerule.

Note: this differs slightly from Bedrock, where tntExplodes false prevents TNT

from igniting at all. Here the explosion still occurs – only terrain damage is

disabled. Other explosion sources (creepers, ghasts, beds, end crystals) are

unaffected; creepers are already covered by vanilla’s mobGriefing.

Server-side only

Install the jar in the server’s mods folder. Vanilla / unmodded clients can
join normally. It also works in single-player if installed on a client.

How it works

• Registers the gamerule with GameRules.register("tntExplodes", Category.MISC, BooleanValue.create(true)) during mod class initialization (NeoForge’s access transformers make these public).
• Listens to ExplosionEvent.Detonate, which fires after the explosion has computed its affected blocks but before anything is destroyed. If the explosion’s direct source entity is a PrimedTnt or MinecartTNT and the gamerule is false, the affected-block list is cleared.

Note: This was to solve an issue with a minigame on my server. I don’t know if I will ever update it. I don’t imagine it will be hard to update, so, feel free to compile from source and change however you want. It’s a tool, use it if you need.