Cannot set FontFace's properties

[INDBRO_San]

Hello,

I was in a process of overhauling a plugin of mine when I found out that you cannot individually set any of FontFace’s properties.

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Reproduction Footage

Reproduction Steps

To replicate this behavior, open the following reproduction place…

TextExample.rbxl (37.2 KB)

…and insert the following into the command bar

game.StarterGui.ScreenGui.TextLabel.FontFace.Style = Enum.FontStyle.Italic; game.StarterGui.ScreenGui.TextLabel.FontFace.Bold = false

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Hoping for this to get fixed.

[Focia19]

We’ve filed a ticket into our internal database for this issue, and will come back as soon as we have updates!

Thanks for flagging!

[Tiffblocks]

Unfortunately, this is expected behavior. When you read the FontFace property, it actually creates a copy of the object and returns it. When you set the properties of that object, it only sets them on the copy and not on the original. This is a limitation that we can’t fix currently.

The workaround is a bit ugly, which is to do something like this instead:

local label = game.StarterGui.ScreenGui.TextLabel
local font = label.FontFace
-- Set properties on copy
font.Style = Enum.FontStyle.Italic
font.Bold = false
-- Set to updated copy
label.FontFace = font

Or like this:

local label = game.StarterGui.ScreenGui.TextLabel
label.FontFace = Font.new(
	label.FontFace.Family,
	Enum.FontWeight.Regular,
	Enum.FontStyle.Italic
)

The reason this isn’t noticeable with other data types like Vector3 is because their properties can’t be modified like this. For example, workspace.Baseplate.Position.X = 2 will throw an error saying X cannot be assigned to.

In the future, we’re hoping to add a script analysis warning in cases like this, to help avoid bugs caused by this.