hookmetamethod - Potassium

function hookmetamethod(object: Instance | table | userdata, method: string, hook: function): table?

Instance | table | userdata

required

The object that contains a metatable.

string

required

A metatable method.

function

required

The function that will hook the ‘method’ function.

Example

Using old we are able to call the old function and act as a middle man between the original function for ‘__newindex’.

local old = nil
old = hookmetamethod(game, "__newindex", function(self, index, value)
  if not checkcaller() then --> Ignore non-executor newindex calls
      return old(self, index, value)
  end

  if value == game then --> Prevent any changes from being made to game
      return nil
  end

  return old(self, index, value)
end)

local objectValue = Instance.new("ObjectValue")
objectValue.Value = workspace
print(objectValue.Value) --> Workspace

objectValue.Value = game
print(objectValue.Value) --> Workspace

​Example

Example