rojo 7.6.1

Enables professional-grade development tools for Roblox developers
Documentation 
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return function()
	local PlayerGui = game:GetService("Players").LocalPlayer.PlayerGui

	local Roact = require(game.ReplicatedStorage.Roact)

	local app = Roact.createElement("ScreenGui", nil, {
		Main = Roact.createElement("TextLabel", {
			Size = UDim2.new(0, 400, 0, 300),
			Position = UDim2.new(0.5, 0, 0.5, 0),
			AnchorPoint = Vector2.new(0.5, 0.5),
			Text = "Hello, Roact!",
		}),
	})

	local handle = Roact.mount(app, PlayerGui)

	local function stop()
		Roact.unmount(handle)
	end

	return stop
end