const container = ContainerMenu.create(player, FakeContainerType.Chest);
container.sendToPlayer();

// Sets the item in slot 0
container.setItem(0, ItemStack.constructWith("minecraft:diamond", 64));
// Adds the item to the first empty slot
container.addItem(ItemStack.constructWith("minecraft:diamond", 64));
// Set multiple items at once
container.setContents({
            5: ItemStack.constructWith("minecraft:gold_ingot", 1),
            7: ItemStack.constructWith("minecraft:iron_ingot", 1),
            9: ItemStack.constructWith("minecraft:emerald", 1),
        });
// Clears the item in slot 5
container.clearItem(5);
// Clears all items
container.clearContents();

// Set a custom name to the container
// (must be called before sending the container)
container.setCustomName("BDSX is awesome !");
// Closes the container client-side, and destructs it.
container.closeContainer();

container.onTransaction((action) => {
    // Do something here...
});

container.onContainerClose(() => {
    // Do something here...
});

const container = ContainerMenu.create(actor, FakeContainerType.Chest);
        container.addItem(ItemStack.constructWith("minecraft:iron_ingot", 1));
        container.addItem(ItemStack.constructWith("minecraft:gold_ingot", 1));
        container.addItem(ItemStack.constructWith("minecraft:diamond", 1));
        container.sendToPlayer();
        container.onTransaction((action) => {
            if(action.type === ItemStackRequestActionType.Take && container.getItem(action.getSrc().slot)?.getName() === "minecraft:diamond") {
                container.closeContainer();
                actor.sendMessage("You have clicked the diamond!");
            }
        });

const container = ContainerMenu.create(actor, FakeContainerType.Chest);
        container.sendToPlayer();
        container.onContainerClose(() => {
            actor.sendMessage("Container closed !");
        });

// The items will not be destructed when the container is closed
const container = ContainerMenu.create(actor, FakeContainerType.DoubleChest, false);

// The old item at slot 0 will not be destructed (destructItems is set to false)
container.setItem(0, ItemStack.constructWith("minecraft:diamond", 1));
// The old item at slot 0 will be destructed (destructItems is overriden to true)
container.setItem(0, ItemStack.constructWith("minecraft:diamond", 1), true);

// This is called automatically if destructItems is set to true
container.destructAllItems();