bespoke

DIY Presentation Micro-Framework

npm install bespoke
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Bespoke.js

DIY Presentation Micro-Framework

Bespoke.js is a super minimal (<1KB min'd and gzipped), modular presentation library for modern browsers, designed to foster a rich plugin ecosystem.

The core library sets up the presentation, provides a simple control API, manages events and adds classes to the slides to allow CSS transitions.

Any other functionality, from keyboard and touch interactions to bullet lists and hash routing, is implemented as a plugin. Joining the Bespoke.js plugin ecosystem is simple with Bespoke.js Plugin Generator.

Creating a Presentation

Due to the highly modular nature of Bespoke.js, the quickest way to get started is with Bespoke.js Generator, a Yeoman generator that scaffolds a boilerplate presentation with a Grunt build system.

Assuming you have Node.js installed, in a blank directory:

$ npm install -g generator-bespoke
$ yo bespoke

In your newly scaffolded project, you can use the following Grunt tasks:

  • $ grunt server to run a preview server with LiveReload.
  • $ grunt deploy to deploy to GitHub Pages.
  • $ grunt to compile static assets to 'public'.

For more detailed instructions, check out the Bespoke.js Generator repo.

If you'd prefer to craft a new presentation from scratch, you can install Bespoke.js from Bower with bower install bespoke.js, from npm with npm install bespoke, or manually download either the production version or the development version. The Bespoke.js core is extremely lightweight, so you'll probably want to include some plugins.

Basic Usage

Markup

It's completely up to you which tags you use, but the following is a good starting point:

<link rel="stylesheet" href="path/to/my/theme.css">

<article id="presentation">
  <section>Slide 1</section>
  <section>Slide 2</section>
  <section>Slide 3</section>
</article>

<script src="bespoke.min.js"></script>
<script src="bespoke-keys.min.js"></script>
<script src="bespoke-touch.min.js"></script>
<script src="path/to/my/script.js"></script>

JavaScript

Decks are created by selecting the parent element with the from(selector[, plugins]) method. Once a parent element is selected, the child elements become slides.

var deck = bespoke.from('#presentation', {
  // Plugins:
  keys: true,
  touch: true
});

Control API

Programmatically control the state of the presentation.

var deck = bespoke.from('#presentation');

// Next slide
deck.next();

// Previous slide
deck.prev();

// Go to a specific slide
deck.slide(0);

// Get the active slide index
deck.slide(); // 0

CSS

To create your own custom deck styles, Bespoke.js provides the necessary classes to your elements.

bespoke-parent The deck's containing element
bespoke-slide Every slide element
bespoke-active The active slide
bespoke-inactive All inactive slides
bespoke-before All slides before the active slide
bespoke-before-n All slides before the active slide, with n value incrementing
bespoke-after All slides after the active slide
bespoke-after-n All slides after the active slide, with n value incrementing

Plugins

Using Plugins

Plugins are specified when instantiating your presentation, like so:

var deck = bespoke.from('#presentation', {
  // Plugins:
  keys: true,
  touch: true
});

Official Plugins

All official plugins can be installed from Bower or npm, e.g. $ bower install bespoke-keys or $ npm install bespoke-touch

Third-Party Plugins

If you'd like your plugin added to this list, let me know.

Advanced Usage

From HTMLElement

If you already have a reference to a DOM node, you can pass it directly to the from method.

bespoke.from(element);

Deck Instances

Creating Deck Instances

Individual deck instances can be created and controlled separately.

// First deck instance
var one = bespoke.from('#deck-one');
one.next();
one.prev();
one.slide(0);

// Second deck instance
var two = bespoke.from('#deck-two');
two.next();
two.prev();
two.slide(0);
Deck Instance Properties

The following properties are available on each instance.

Note: The optional eventData parameter is an object that will be merged with the event object in subsequent event handlers.

next([eventData]) Next slide.
prev([eventData]) Previous slide.
slide([index[, eventData]]) Get or set the active slide index.
on(event, callback) Attach event handlers
fire(event[, eventData]) Fire custom events. This method is primarily designed for plugin authors.
parent The deck's parent element
slides An array of slide elements

Events

Binding Events

Events are bound via the deck instance. Each event is passed an event object containing a reference to the relevant slide and its index.

deck.on(eventName, function(event) {
  event.slide; // Relevant slide
  event.index; // Index of relevant slide

  // Prevent default functionality (for deck interaction events only)
  return false;
});
Standard Events

In most cases, you will only need to use these standard events.

activate A slide has been activated. event.slide is the activated slide.
deactivate A slide has been deactivated. event.slide is the deactivated slide.
Deck Interaction Events

These events are fired when the deck has been interacted with, but before the interaction has had any effect.

This allows you to intercept the default behaviour by returning false from the event handler.

next The next slide has been requested, even if last slide is active. event.slide is the current slide.
prev The previous slide has been requested, even if first slide is active. event.slide is the current slide.
slide A specific slide has been requested. event.slide is the requested slide.
Unbinding events

When binding events, the on method returns a function that can be used to remove the event handler.

var off = deck.on('activate', function() {
  // ...
});

// Unbind event
off();

Creating Plugins

Want a boilerplate plugin? Use the official Bespoke.js Plugin Generator.

If you'd like to learn by example, check out the list of existing plugins.

Basic Plugins

Plugins are simply functions that are called when presentations are created.

They are passed a deck instance which allows you to interact with the deck's state, bind events and modify its elements.

// Creating the plugin
bespoke.plugins.myPlugin = function(deck) {
  deck.on('activate', function(e) {
    console.log('Activated slide ' + (e.index + 1) + ' of ' + deck.slides.length);
  });
};

The plugin can now be provided to the second parameter of the from(selector[, plugins]) method.

// Using the plugin
bespoke.from('#presentation', { myPlugin: true });

Note: Your plugin won't run if the option value provided is false.

Plugins with Options

If your plugin needs some configurability, options can be passed through as the second parameter.

// Creating the plugin with options
bespoke.plugins.myPlugin = function(deck, options) {
  var showTotal = options && options.showTotal;

  deck.on('activate', function(e) {
    console.log('Activated slide ' + (e.index + 1) +
      (showTotal ? ' of ' + deck.slides.length : ''));
  });
};

// Using the plugin with options
bespoke.from('#presentation', {
  myPlugin: {
    showTotal: true
  }
});

Custom Event Data

Additional event data can be supplied to next, prev and slide, which is merged with the final event object in subsequent event handlers.

This functionality is particularly useful if you need to differentiate between events caused by your plugin, and those caused by your end users or other plugins.

bespoke.plugins.myPlugin = function(deck) {

  // Differentiating our plugin's events
  deck.on('activate', function(event) {
    if (event.foo === 'bar') {
      // Triggered by my plugin...
    } else {
      // Triggered by end user, or another plugin...
    }
  });

  // Providing custom event data
  deck.next({
    foo: 'bar'
  });

};

Presentations

Made a presentation with Bespoke.js? Let me know.

Questions?

Contact me on GitHub or Twitter: @markdalgleish

License

MIT License

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