setreadonly - Mintlify Starter Kit

Locks or unlocks a table - locked tables can’t have their contents changed until they’re unlocked.

setreadonly(t: table, readonly: boolean): ()

Most commonly used to lock the table again after unlocking it.

Parameters

Parameter	Type	Description
`t`	`table`	The table to lock or unlock.
`readonly`	`boolean`	`true` locks the table, `false` unlocks it.

Returns

void

Example

Hook the __namecall metamethod, and prevent the <RemoteEvent> UpdateFPS from firing.

setreadonly(getrawmetatable(game), false)

local updatefps = game:GetService("ReplicatedStorage"):WaitForChild("UpdateFPS")

local prev = getidentity()
setidentity(3)

local mt = getrawmetatable(game)
local oldNamecall = mt.__namecall

setreadonly(mt, false)
mt.__namecall = newcclosure(function(self, ...)
    -- block FireServer on updatefps from the game's own scripts and let seliware through
    if self == updatefps and not checkcaller() then
        local method = getnamecallmethod()

        if method == "FireServer" or method == "fireServer" then
            return
        end
    end

    return oldNamecall(self, ...)
end)
setreadonly(mt, true)

setidentity(prev)

Unified wrapper equivalent to calling makereadonly or makewritable.