Computed

A reactive state that updates based on when other values update

Type	Since	Scoped
State	0.0.1	Yes

Constructor

Computed(CalculationFunction : (Use : (Value : Value) -> Value.Value) -> nil)

Properties

Value : any

The current value of the compute state. Read-only.

Usage

Computed acts as a state that is updated every frame. For example, if you want the x-position of a frame instance to be based on a number value, then you can do:

local XPosition = Value(0)

New(MyFrame, {
    Position = Computed(function(Use) -- Updates when XPosition changes
        return UDim2.fromScale(Use(XPosition), 0)
    end)
})

XPosition.Value = 0.5 -- Updates x position to 0.5, meaning compute.value = UDim2.fromScale(0.5, 0)

Computeds can be created on their own, like this:

local MyComputation = Computed(function(Use)
    return UDim2.fromScale(Use(XPosition), 0)
end)

Or embedded like this:

New(MyFrame, {
    Position = Computed(function(Use)
        return UDim2.fromScale(Use(XPosition), 0)
    end)
})