ScreenJS cursed showcase

grass_crafting.js

StartupEvents.registry('menu', event => {

    event.create('grass_block', 'block')
        .addOutputSlot(98, 36, 0, 0, 1, 'minecraft:crafting')
        .loop(builder => {
            for (let y = 0; y < 3; y++) {
                for(let x = 0; x < 3; x++) {
                    builder.addSlot(x * 18 + 8 /*<- the width of a slot, remember to add this*/, y * 18 + 18, x + y * 3, 0)
                }
            }
        })
        .addItemHandler(9)
        .addItemHandler(1)
        .inputSlotIndices(0)
        .playerInventoryY(100)
        .tintColor(0xFF00FF00)
        .setBlock('minecraft:grass_block') // the block that should open this GUI on right-click
        .slotChanged((menu, level, player, items) => {
		global.slotChanged(menu, level, player, items)
        })
})

global.slotChanged = (menu, level, player, items) => {
    if (!level.clientSide) {
        let stack = '0x minecraft:air'

        let wrapper = new CraftingWrapper(menu, 3, 3, items.getContainer(0))
        let optional = level.server.recipeManager.getRecipeFor('minecraft:crafting', wrapper, level)
        if (optional.present) {
            stack = optional.get().assemble(wrapper)
        }

        let output = items.getContainer(1)
        output.setStackInSlot(0, stack)
        menu.setRemoteSlot(9, stack)
        menu.broadcastChanges()
    }
}