How do i check if a player jumps?

I have a game where i want players to have a higher jump power everytime they jump but my script isn't working right. Can somebody help me? This is my script:

local JumpPower = 50
local Player = script.Parent

while wait() do
	if Player.Humanoid.jumping == true then
		repeat
			JumpPower = JumpPower + 0.01
			Player.Humanoid.JumpPower = JumpPower
			print(JumpPower)
		until Player.Humanoid.jumping == false
	end
end

But when i jump for some reason if Player.humanoid.jumping == true then is always false. This is the full script.

Make a KeyDown Event with the Space Key, and in the event do what you want it to do if it's pressed.

###There is a property and an event that can do this. I will use the event, as using loops to check for something is a bad practice.

local JumpPower = 50
local Character = script.Parent

Character.Humanoid.Jumping:Connect(function(active) -- parameter is if they're still jumping
    repeat
        JumpPower = JumpPower + 0.01
        Character.Humanoid.JumpPower = JumpPower
        print(JumpPower)
    until not active -- repeat until stop jumping 
end)