Allow Roact Bindings to skip property updates

src/PropMarkers/Constant.lua

@@ -0,0 +1,7 @@
+local Symbol = require(script.Parent.Parent.Symbol)
+
+local Constant = {
+	SkipBindingUpdate = Symbol.named("SkipBindingUpdate"),
+}
+
+return Constant

src/RobloxRenderer.lua

@@ -10,6 +10,7 @@ local ElementKind = require(script.Parent.ElementKind)
 local SingleEventManager = require(script.Parent.SingleEventManager)
 local getDefaultInstanceProperty = require(script.Parent.getDefaultInstanceProperty)
 local Ref = require(script.Parent.PropMarkers.Ref)
+local Constant = require(script.Parent.PropMarkers.Constant)
 local Type = require(script.Parent.Type)
 local internalAssert = require(script.Parent.internalAssert)
 
@@ -69,6 +70,10 @@ end
 
 local function attachBinding(virtualNode, key, newBinding)
 	local function updateBoundProperty(newValue)
+		if newValue == Constant.SkipBindingUpdate then
+			return
+		end
+
 		local success, errorMessage = xpcall(function()
 			setRobloxInstanceProperty(virtualNode.hostObject, key, newValue)
 		end, identity)

src/init.lua

@@ -30,6 +30,7 @@ local Roact = strict({
 	Change = require(script.PropMarkers.Change),
 	Children = require(script.PropMarkers.Children),
 	Event = require(script.PropMarkers.Event),
+	Constant = require(script.PropMarkers.Constant),
 	Ref = require(script.PropMarkers.Ref),
 
 	mount = robloxReconciler.mountVirtualTree,