Double Jump Script [Roblox]

local character = script.Parent
local humanoid = character:WaitForChild("Humanoid")

local uis = game:GetService("UserInputService")

local canDoubleJump = false
local hasLanded = true


humanoid.StateChanged:Connect(function(previous, new)

	if new == Enum.HumanoidStateType.Jumping and hasLanded then

		if not canDoubleJump then canDoubleJump = true; hasLanded = false end


	elseif new == Enum.HumanoidStateType.Landed then

		canDoubleJump = false
		hasLanded = true
	end
end)

uis.InputBegan:Connect(function(input, processed)

	if processed then return end

	if input.KeyCode == Enum.KeyCode.Space then

		if canDoubleJump then

			humanoid:ChangeState(Enum.HumanoidStateType.Jumping)
			canDoubleJump = false
		end
	end
end)