react-raffle-hook

A React hook for creating raffle/lottery systems with countdown and winner selection.

Installation

npm install react-raffle-hook

or

yarn add react-raffle-hook

Features

• 🎲 Random winner selection from participants
• ⏱️ Customizable countdown timer
• 🔄 Support for multiple winners
• 🎯 TypeScript support
• 🪝 Simple React hook API
• ⚡ Lightweight with zero dependencies (except React)

Usage

import { useRaffle } from 'react-raffle-hook';

function RaffleComponent() {
  const { winners, isRunning, countdown, startRaffle, resetRaffle } = useRaffle({
    participants: ['Alice', 'Bob', 'Charlie', 'David', 'Eve'],
    winnerCount: 2,
    countdownTime: 5000,
    onStart: () => console.log('Raffle started!'),
    onFinish: (winners) => console.log('Winners:', winners),
  });

  return (
    <div>
      <h1>Raffle Draw</h1>
      
      {isRunning && <p>Drawing in {countdown / 1000}s...</p>}
      
      {winners.length > 0 && (
        <div>
          <h2>Winners:</h2>
          <ul>
            {winners.map((winner, index) => (
              <li key={index}>{winner}</li>
            ))}
          </ul>
        </div>
      )}
      
      <button onClick={startRaffle} disabled={isRunning}>
        Start Raffle
      </button>
      <button onClick={resetRaffle} disabled={isRunning}>
        Reset
      </button>
    </div>
  );
}

API

useRaffle(options: RaffleOptions)

Options

Property	Type	Default	Description
participants	(string | number)[]	required	Array of participants for the raffle
winnerCount	number	1	Number of winners to select
countdownTime	number	3000	Countdown duration in milliseconds
onStart	() => void	undefined	Callback fired when raffle starts
onFinish	(winners) => void	undefined	Callback fired when raffle finishes with winners

Returns

Property	Type	Description
participants	(string | number)[]	The participants array
winners	(string | number)[]	Array of selected winners
isRunning	boolean	Whether the raffle is currently running
countdown	number	Current countdown value in milliseconds
startRaffle	() => void	Function to start the raffle
resetRaffle	() => void	Function to reset the raffle state

Examples

Basic Example

import { useRaffle } from 'react-raffle-hook';

function BasicRaffle() {
  const { winners, startRaffle } = useRaffle({
    participants: ['John', 'Jane', 'Bob', 'Alice'],
  });

  return (
    <div>
      <button onClick={startRaffle}>Draw Winner</button>
      {winners.length > 0 && <p>Winner: {winners[0]}</p>}
    </div>
  );
}

Multiple Winners

import { useRaffle } from 'react-raffle-hook';

function MultipleWinners() {
  const { winners, startRaffle } = useRaffle({
    participants: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
    winnerCount: 3,
  });

  return (
    <div>
      <button onClick={startRaffle}>Draw 3 Winners</button>
      {winners.length > 0 && (
        <div>
          <h3>Winners:</h3>
          {winners.map((winner) => <p key={winner}>{winner}</p>)}
        </div>
      )}
    </div>
  );
}

With Custom Countdown

import { useRaffle } from 'react-raffle-hook';

function CustomCountdown() {
  const { winners, isRunning, countdown, startRaffle, resetRaffle } = useRaffle({
    participants: ['Team A', 'Team B', 'Team C', 'Team D'],
    countdownTime: 10000, // 10 seconds
    onFinish: (winners) => {
      alert(`The winner is: ${winners[0]}`);
    },
  });

  return (
    <div>
      {isRunning && <h2>{countdown / 1000} seconds remaining...</h2>}
      {winners.length > 0 && <h1>🎉 Winner: {winners[0]}</h1>}
      
      <button onClick={startRaffle} disabled={isRunning}>
        Start Draw
      </button>
      <button onClick={resetRaffle}>Reset</button>
    </div>
  );
}

TypeScript

This package includes TypeScript definitions out of the box.

import { useRaffle, RaffleOptions } from 'react-raffle-hook';

const options: RaffleOptions = {
  participants: ['Alice', 'Bob', 'Charlie'],
  winnerCount: 1,
  countdownTime: 5000,
};

const raffle = useRaffle(options);

License

MIT © melodyxpot

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Repository

https://github.com/melodyxpot/react-raffle-hook