Client versions

if player:supports("display") then
    world.display{ kind = "text", text = "Bet 50", at = pad }
else
    board:text(8, 8, "Bet 50", colors.white, 24)   -- a screen works from 1.8
end

feature	what needs it	from
bossbar	ui.bossbar, player.ui.bossbar	1.9
potion_color	an item’s color	1.11
floor_frame	a screen or frame with facing = "up"	1.13
light	world.light	1.14
hex_color	a colour outside Minecraft’s sixteen names	1.16
glow_frame	glow = true on a screen	1.17
display	world.display, any kind	1.19.4
hitbox	world.hitbox	1.19.4
model	world.display{ kind = "model" }	1.21.4
layout	player.ui.show	1.21.4
dialog	player.ui.dialog	1.21.6
overlay	player.ui.overlay	26.3 only
resource_pack	the pack’s textures, models and sounds	a client that did not turn the pack down

• A name not in this table is an error.
• A client that turns the resource pack down answers false to resource_pack, model, layout, dialog and overlay, from the moment it answers. It is sent no layout and no dialog: they are drawn in the pack’s fonts. An open dialog closes.
• A Bedrock client answers false to every feature in this table.
• Unguarded calls are safe: a client that cannot show a feature is not sent it. Guard only to show something else.
• Or set min_client in citadel.yml to refuse old clients.