This is a simple addon that adds the command "/function vanish" which toggles on and off invisibility, the way i've made this addon also hides the players held item as well as their armour.
Select version for changelog:
Changelog
Fixed a formatting issue with the web page.
Fixed an issue with the resource not being auto applied as a dependency.
Cleaned up the internals of the mod bringing the file size down.
The Link Is A Direct Download From MCPEDL.com Itself.
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