How to add anything to a type?

[BlueBloxBlast]

Hi, I don’t know how to explain it, so hopefully this code and the title is enough. Sorry!

type button = {
 Name: string,
 Cool: Boolean,
 …--Allows for anything to be added?
}

Any help is appreciated, thanks!

[Brylan_Leske (Brylan)]

To allow anything in a type, you should use ‘any’

Ex.

type button = {
 Name: string,
 Cool: Boolean,
 Property: any --Allows for anything to be added
}

[BlueBloxBlast]

Sorry, I meant so that it there could be anything added any time, for example,

local function addSomething(button: button)
 -- these all add new stuff that wasn’t originally in the type
 button.Hi = true
 button.Hey = false
end

[Benified4Life (Sekonds)]

That defeats the purpose of the type - if you want to do something like this, you may as well just use a dictionary.

[VegetationBush (FartedWayTooHard)]

You can add a [string]: any to be able to add anything to something assigned that type:

type foo = {
    bar: number,
    [string]: any,
}

Alternatively, Luau automatically assigns types to unsealed tables you declare them with values.

Type checking

[BlueBloxBlast]

Yes! Exactly what I wanted! Thanks a lot!
(Again!)

[BlueBloxBlast]

Yeah, I was mainly doing this so that I can add functions to self, from all of the functions inside of the module