Block Loot

In Minecraft, block drops are also loot tables. A mined block does not always drop itself, and some drops can be affected by Fortune. What drops depends on what is rolled from the loot pool.

Override Block Loot

The following example creates a Lucky-Block-like random item drop behavior:

ServerEvents.blockLootTables(e=>{
    Block.getTypeList().forEach(block=>{
        e.addBlock(block,l=>{
            l.addPool(p=>{
                Ingredient.of("@minecraft").getItemIds().forEach(itemId=>{
                    p.addItem(Item.of(itemId))
                })
            })
        })
    })
})

In this example, all mined blocks are changed to drop random Minecraft items.

Add to Existing Loot

The following adds entries to dirt's original loot so it can drop dirt plus the added item:

ServerEvents.blockLootTables(e=>{
    e.modifyBlock('minecraft:dirt',loot=>{
        let pool = [{
            "type":"minecraft:item",
            "name":"minecraft:diamond"
        }]
        let arr = loot.pools.get(0).asJsonObject.get("entries").asJsonArray
        arr.addAll(pool)
    })
})

In kubejs-forge-2001.6.5-build.14, using JsonArray.add() directly may throw an error. This example uses addAll instead. Since addAll needs an array, the entry JSON is wrapped in [].