Java JSON Fabric API

Custom Trigger Snippet.

A complete custom trigger setup for advancement criteria. This example tracks breaking 10 logs. Replace yourmod with your mod ID throughout.

// how to use

Create the trigger class, register it in ModTriggers, call registerModTriggers() from your mod initializer, and add the advancement JSON.

// requirements

Fabric API, Minecraft 1.20+, Java 17+. Allows custom advancement trigger conditions.

package com.yourmod.trigger;

import net.minecraft.advancement.criterion.AbstractCriterion;
import net.minecraft.advancement.criterion.CriterionConditions;
import net.minecraft.server.network.ServerPlayerEntity;

public class BreakLogsTrigger extends AbstractCriterion<CriterionConditions> {

    public BreakLogsTrigger() {
        super();
    }

    public void trigger(ServerPlayerEntity player, int logsBroken) {
        if (logsBroken >= 10) {
            this.test(player, new CriterionConditions());
        }
    }
}

package com.yourmod.trigger;

import com.yourmod.YourMod;
import net.minecraft.registry.Registries;
import net.minecraft.registry.Registry;
import net.minecraft.util.Identifier;

public class ModTriggers {

    public static final BreakLogsTrigger BREAK_10_LOGS = register("break_10_logs", new BreakLogsTrigger());

    private static BreakLogsTrigger register(String name, BreakLogsTrigger trigger) {
        return Registry.register(Registries.CUSTOM_STAT, new Identifier(YourMod.MOD_ID, name), trigger);
    }

    public static void registerModTriggers() {
        YourMod.LOGGER.info("Registering triggers for " + YourMod.MOD_ID);
    }
}

{
  "criteria": {
    "break_logs": {
      "trigger": "yourmod:break_10_logs"
    }
  },
  "rewards": {
    "experience": 50,
    "loot": ["yourmod:example_loot"]
  },
  "display": {
    "icon": { "item": "minecraft:oak_log" },
    "title": "Lumberjack",
    "description": "Break 10 logs in survival",
    "frame": "task",
    "show_toast": true,
    "announce_to_chat": true
  }
}

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