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 and manages events. Any other functionality is implemented as a plugin.

Joining the Bespoke.js ecosystem is simple with the suite of official Yeoman generators:

• Bespoke.js Generator
• Bespoke.js Plugin Generator
• Bespoke.js Theme 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 Gulp 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 Gulp tasks:

• $ gulp serve to run a preview server with LiveReload.
• $ gulp deploy to deploy to GitHub Pages.
• $ gulp 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 npm with npm install bespoke, Bower with bower install bespoke.js, 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

Loading Bespoke

Bespoke.js is shipped in a UMD format, meaning that bespoke and its plugins are available as CommonJS/AMD modules or browser globals.

Markup

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

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

JavaScript

To create a new presentation, Bespoke.js provides the from(selector[, plugins]) method, which takes a selector or element reference and an array of plugins, and returns a deck instance.

var deck = bespoke.from('#presentation', [plugins]);

// Next slide
deck.next();

// Previous slide
deck.prev();

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

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

By default, all non-script child elements of the resolved parent element become slides. You can customize this behavior by passing a custom selector.

Plugins

Official Plugins

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

• bespoke-keys for keyboard and remote control interaction.
• bespoke-touch for touch interaction.
• bespoke-classes for deck status classes.
• bespoke-bullets for animated bullet lists.
• bespoke-scale for responsive slide scaling.
• bespoke-hash for hash routing.
• bespoke-backdrop for animated backdrop elements.
• bespoke-state for slide-specific deck styles.
• bespoke-progress for progress bars.
• bespoke-forms for form element support.
• bespoke-loop for looped presentations.
• bespoke-vcr for recording and playback.

All Plugins

You can view the full list of Bespoke.js plugins on npm by browsing the bespoke-plugin keyword.

Using Plugins

All official plugins are provided in a UMD format, meaning they are available as CommonJS/AMD modules or browser globals.

For example, if you're using CommonJS modules via browserify or webpack, it would look something like this:

var bespoke = require('bespoke'),
  classes = require('bespoke-classes'),
  keys = require('bespoke-keys'),
  touch = require('bespoke-touch');

var deck = bespoke.from('#presentation', [
  classes(),
  keys(),
  touch()
]);

If you're using browser globals, all official plugins are added to the bespoke.plugins object, for example:

var deck = bespoke.from('#presentation', [
  bespoke.plugins.classes(),
  bespoke.plugins.keys(),
  bespoke.plugins.touch()
]);

The first slide is activated automatically after all plugins are called unless one of those plugins has already activated a slide.

Themes

Official Themes

• Cube — (view demo)
• Voltaire — (view demo)
• Nebula — (view demo)

As with plugins, all official themes can be installed from npm or Bower, e.g. $ npm install bespoke-theme-cube or $ bower install bespoke-theme-voltaire

All Themes

You can view the full list of Bespoke.js themes on npm by browsing the bespoke-theme keyword.

Using Themes

Themes are included just like any other plugin:

var bespoke = require('bespoke'),
  cube = require('bespoke-theme-cube'),
  keys = require('bespoke-keys'),
  touch = require('bespoke-touch');

var deck = bespoke.from('#presentation', [
  cube(),
  keys(),
  touch()
]);

If you're using browser globals, all official themes are added to the bespoke.themes object, for example:

var deck = bespoke.from('#presentation', [
  bespoke.themes.cube(),
  bespoke.plugins.keys(),
  bespoke.plugins.touch()
]);

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);

Slide Selector

You can specify which elements become slides by passing an options Hash containing the key parent and, optionally, the key slides) to the from method. The value of either key can be a CSS selector or a DOM node.

bespoke.from({ parent: selectorOrElement, slides: selectorOrElementList });

For example:

bespoke.from({ parent: '#presentation', slides: '#presentation > section' });

This advanced usage allows you to include auxilary HTML inside the parent element, skip slides that don't match the selector or explicitly filter out slides before passing on the collection.

Deck Instances

Deck instances are provided to plugins and returned when instantiating a presentation. 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
off(event, callback)	Unbind 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
destroy	Fire the destroy event. This method can be used to remove the deck from the DOM.

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.
destroy	Presentation is about to be destroyed, it's time for clean-up.

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();

You can also use the off method. However, you must use the same function reference that was used when registering the event.

// Bind event
deck.on('activate', onActivate);

// Unbind event
deck.off('activate', onActivate);

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.

To be consistent with the suite of official Bespoke.js plugins, it is highly recommended that you implement your plugin as a function that takes configuration and returns a plugin function.

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

The plugin can now be provided in the plugins array when using the from(selector[, plugins]) method.

// Using the plugin
bespoke.from('#presentation', [
  myPlugin()
]);

Plugins with Options

If your plugin needs some configurability, your plugin factory function can take options and return a configured plugin function.

// Creating the plugin with options
var myPlugin = function(options) {
  return function(deck) {
    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.

var myPlugin = function() {
  return 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'
    });

  };
}

Creating Themes

Themes are essentially just plugins that also happen to insert styles into the page.

You can quickly scaffold a boilerplate theme project with the official Bespoke.js Theme Generator.

Presentations

• A State of Change — On the future of Object.observe by Mark Dalgleish
• Build Wars: Gulp vs Grunt by Mark Dalgleish
• Bespoke.js: The Road to 1KB by Mark Dalgleish
• DIY Presentations With Bespoke.js by Mark Dalgleish
• Javascript's Slightly Stricter Mode by Glen Maddern
• The Trials of Transition Height: Auto by Charlie Gleason
• Welcome Our New ES5 Overlords by Mike MacCana
• Rapid Web App Dev With Yeoman by Michael Taranto
• Projects vs Products by John Barton
• Learn You The Node.js For Much Win by Rod Vagg
• A Real Database Rethink by Rod Vagg
• Feature Flags with Directives by Michael Taranto
• Introduction to hapi by Mark Wolfe
• How to Cook a Graph Database in a Night by Matteo Collina
• Asynchronous JavaScript Interfaces by Mariusz Nowak
• MQTT and Node.js - Messaging in the Internet of Things by Matteo Collina
• At Least 6 Ways to Win with CSS Modules by Josh Johnston

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

Questions?

Contact me on GitHub or Twitter: @markdalgleish

License

MIT License