Spinner Wheel

Type one option per line and each becomes a coloured slice of the wheel; press spin and the pointer at the top picks one after a four and a half second deceleration. Turn on remove-winner mode and each result is taken out of the list, which turns the wheel into a raffle draw or a secret-santa assignment instead of an independent coin flip. The last twenty winners stay in a history strip until you clear it.

The animation is theatre and the draw is not. The winner is selected from crypto.getRandomValues before the wheel starts moving, and the easing curve is then computed to land on it — so nothing about how the wheel slows down, where it appears to nearly stop, or how close the pointer comes to the neighbouring slice has any bearing on the outcome. That ordering is deliberate: a wheel that genuinely simulated friction would have to decide the result from a physics model, and getting uniformity out of a physics model is far harder than getting drama out of a known answer.

Two behaviours are worth knowing before you trust a draw to it. Duplicate lines make duplicate slices, and a name that appears twice is twice as likely to win — useful if you meant to weight it, a silent bug if it got pasted twice. And remove-winner mode changes the odds as it goes: in a list of five, the first draw is one in five and the last is certain. That is what you want for assigning five tasks to five people and not what you want for five independent picks, where the same option should be able to come up again.

Everything happens in the tab, so there is no server deciding anything and no record of the draw beyond the history strip, which lives in the page and disappears when you clear it. For a raffle where the participants need to trust the result, that is the limit worth stating out loud: the person running the wheel could reload and spin again, and nothing here would show it. Spin on a shared screen, or use a method with a published seed.