A random wheel is good for one thing: making a choice that nobody has to make. Below are ten setups that work, each with the exact steps and the wheel that fits it, followed by how the winner is chosen.
Every entry gets a slice of exactly the same size, so with N entries each one has a 1 in N chance on every spin. The only way to give an entry better odds is to type it more than once.
The result is fixed the moment you press spin: the wheel picks a random number of full turns plus a random stopping angle, using the browser's built-in random number generator, and then animates to that point. When you click, or which device you use, doesn't change the odds.
There is no hidden weighting, and each spin is independent of the last one. The generator is a standard pseudo-random one, not a cryptographic one: fair for classrooms, games and informal giveaways, but a regulated lottery or a prize draw with legal requirements needs a certified draw method.
To make a draw easy to check, show your screen while you spin, remove each winner so nobody can be picked twice, and keep the Winners tab open: it lists every result in order.
