Advanced Shulkerboxes - Convenient Shulker Boxes
With this mod, you can open shulker boxes directly from your inventory without placing them in the world. Simply right-click on the box in your inventory - and it will open. If you need to place the box on the ground, just crouch while clicking.

How to Install the Mod
For versions 2.x.x and newer
It's enough to install the mod only on the server, but for better convenience, it's recommended to also install it on the client.
For versions 1.x.x
Installation of the mod is required both on the server and on the client.
Configuration Settings
For versions 2.x.x and newer
The configuration file is located at: config/shulkerbox/shulkerbox.properties.
For versions 1.x.x
The configuration file is located in your world folder, in a subfolder called serverconfig, and is named shulkerbox-server.toml.