1. apireference
2. avatar
3. humanoid

StateChanged

Parameters

Name	Type	Default	Description
Name old	Type HumanoidStateType	Default	Summary The Humanoid|Humanoid's previous state type
Name new	Type HumanoidStateType	Default	Summary The Humanoid|Humanoid's current state type

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Code Samples

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Jumping Particles

Emits particles from the Player|Player's Player/Character when they jump.

To try this code sample, place it inside a LocalScript parented to StarterCharacterScripts|StarterPlayer.StarterCharacterScripts.

local character = script.Parent

local primaryPart = character.PrimaryPart

-- create particles
local particles = Instance.new("ParticleEmitter")
particles.Size = NumberSequence.new(1)
particles.Transparency = NumberSequence.new(0, 1)
particles.Acceleration = Vector3.new(0, -10, 0)
particles.Lifetime = NumberRange.new(1)
particles.Rate = 20
particles.EmissionDirection = Enum.NormalId.Back 
particles.Enabled = false
particles.Parent = primaryPart

local humanoid = character:WaitForChild("Humanoid")

local isJumping = false

-- listen to humanoid state
humanoid.StateChanged:Connect(function(oldState, newState)
	if newState == Enum.HumanoidStateType.Jumping then
		if not isJumping then
			isJumping = true
			particles.Enabled = true
		end
	elseif newState == Enum.HumanoidStateType.Landed then
		if isJumping then
			isJumping = false
			particles.Enabled = false
		end
	end
end)

Jump Cooldown

The following sample will require a one second cooldown after a Humanoid has landed before it is able to jump again.

To try this sample, place it inside a LocalScript in StarterCharacterScripts|StarterPlayer.StarterCharacterScripts.

local character = script.Parent

local JUMP_DEBOUNCE = 1

local humanoid = character:WaitForChild("Humanoid")

local isJumping = false
humanoid.StateChanged:Connect(function(oldState, newState)
	if newState == Enum.HumanoidStateType.Jumping then
		if not isJumping then
			isJumping = true
			humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, false)
		end
	elseif newState == Enum.HumanoidStateType.Landed then
		if isJumping then
			isJumping = false
			wait(JUMP_DEBOUNCE)
			humanoid:SetStateEnabled(Enum.HumanoidStateType.Jumping, true)
		end
	end
end)