Create an extremely biased, web-based slot machine game.

• Faux-panoramic reel animations (3D cylinder, without <canvas>)
• Support for single/multi-line reels and pay-lines.
• Pseudo-random selections by configured weight.
• Configurable RNG (to make it less biased)
• Configurable sound clips for reel animations.
• Easy to set-up and customize. No dependencies.

Checkout the demo for examples of use.

• Node.js

Install the package into your project using NPM, or download the sources.

$ npm install slot-machine-gen

To add to an existing React or Vue project you can install this package using YARN.

$ yarn add react-slot-machine-gen

$ yarn add vue-slot-machine-gen

There are two ways you can use this package. One is by including the JavaScript/CSS sources directly. The other is by importing the module into your component.

After you build the distribution sources the set-up is fairly simple..

<script type="text/javascript" src="path/to/slot-machine.min.js"></script>
<link rel="stylesheet" href="path/to/slot-machine.min.css" media="all" />

<script type="text/javascript">
  slotMachine(container, reels, callback, options);
</script>

If your using a modern framework like Aurelia, Angular, React, or Vue

import SlotMachine from 'slot-machine-gen';
import 'slot-machine-gen/dist/slot-machine.css';

const slotMachine = new SlotMachine(container, reels, callback, options);

<div id="slot-machine" class="slot-machine"></div>

Outside of a reel image source, symbols must contain the following:

const reels = [
  {
    imageSrc: 'path/to/image.png',
    symbols: [
      {
        title: 'cherry',
        position: 100,
        weight: 2
      },
      {
        title: 'plum',
        position: 300,
        weight: 6
      },
      {
        title: 'orange',
        position: 500,
        weight: 5
      },
      {
        title: 'bell',
        position: 700,
        weight: 1
      },
      {
        title: 'cherry',
        position: 900,
        weight: 3
      },
      {
        title: 'plum',
        position: 1100,
        weight: 5
      }
    }
  },

  // add more reels ...
]

slotMachine.play();

Customization and overriding defaults can be done using the following options:

This method returns an array of selected reel symbols that can be used to compute scoring, show animations, handle client interactions, etc..

const callback = function(symbols) {
  if (symbols[0].title === 'cherry' && symbols[1].title === 'cherry' && symbols[2].title === 'cherry') {
    window.alert("You're a winner!");
  }
};

Creating a custom strip is fairly easy. What is most important is that each symbol, whether an image or blank space, contains a vertical position that can be measured by calculating the symbol center (in pixels) from the strip top. A Photoshop example has been provided with this package for reference.

Run ESLint on project sources:

$ npm run lint

Transpile ES6 sources (using Babel) and minify to a distribution:

$ npm run build

If you fix a bug, or have a code you want to contribute, please send a pull-request with your changes. (Note: Before committing your code please ensure that you are following the Node.js style guide)

This package is maintained under the Semantic Versioning guidelines.

This package is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.

slot-machine-gen is provided under the terms of the MIT license

Marc S. Brooks