rearrange plugins/dependencies
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Hakim El Hattab
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124
README.md
124
README.md
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@ -18,7 +18,6 @@ This project was started and is maintained by [@hakimel](https://github.com/haki
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- [Initialization](#initialization)
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- [Configuration](#configuration)
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- [Presentation Size](#presentation-size)
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- [Dependencies](#dependencies)
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- [Ready Event](#ready-event)
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- [Auto-Slide](#auto-slide)
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- [Auto-Animate](#auto-animate)
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@ -26,6 +25,8 @@ This project was started and is maintained by [@hakimel](https://github.com/haki
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- [Vertical Slide Navigation](#vertical-slide-navigation)
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- [Touch Navigation](#touch-navigation)
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- [Lazy Loading](#lazy-loading)
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- [Plugins](#plugins)
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- [Dependencies](#dependencies)
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- [API](#api)
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- [Custom Key Bindings](#custom-key-bindings)
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- [Slide Change Events](#slide-change-events)
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@ -56,7 +57,6 @@ This project was started and is maintained by [@hakimel](https://github.com/haki
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- [Server Side Speaker Notes](#server-side-speaker-notes)
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- [Multiplexing](#multiplexing)
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- [MathJax](#mathjax)
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- [Plugins](#plugins)
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- [License](#license)
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#### More reading
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@ -447,41 +447,6 @@ Reveal.initialize({
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});
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```
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### Dependencies
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Reveal.js doesn't _rely_ on any third party scripts to work but a few optional libraries are included by default. These libraries are loaded as dependencies in the order they appear, for example:
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```javascript
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Reveal.initialize({
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dependencies: [
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// Interpret Markdown in <section> elements
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{ src: 'plugin/markdown/marked.js', condition: () => { return !!document.querySelector( '[data-markdown]' ); } },
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{ src: 'plugin/markdown/markdown.js', condition: () => { return !!document.querySelector( '[data-markdown]' ); } },
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// Syntax highlight for <code> elements
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{ src: 'plugin/highlight/highlight.js', async: true },
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// Zoom in and out with Alt+click
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{ src: 'plugin/zoom-js/zoom.js', async: true },
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// Speaker notes
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{ src: 'plugin/notes/notes.js', async: true },
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// MathJax
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{ src: 'plugin/math/math.js', async: true }
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]
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});
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```
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You can add your own extensions using the same syntax. The following properties are available for each dependency object:
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- **src**: Path to the script to load
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- **async**: [optional] Flags if the script should load after reveal.js has started, defaults to false
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- **callback**: [optional] Function to execute when the script has loaded
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- **condition**: [optional] Function which must return true for the script to be loaded
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You can also include dependencies which are bundled/already present on the page. To include a bundled plugin. replace the `src` property with a reference to a `plugin` instance:
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- **plugin**: the plugin instance (see [Plugins](#plugins))
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### Ready Event
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A `ready` event is fired when reveal.js has loaded all non-async dependencies and is ready to start navigating. To check if reveal.js is already 'ready' you can call `Reveal.isReady()`.
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@ -658,6 +623,67 @@ You can also change the default globally with the `preloadIframes` configuration
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regardless of individual `data-preload` attributes. If set to `false`, all iframes will only be
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loaded when they become visible.
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### Plugins
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Plugins should register themselves with reveal.js by calling `Reveal.registerPlugin( MyPlugin )`. Registered plugins _must_ expose a unique `id` property and can optionally expose an `init` function that reveal.js will call to initialize them.
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When reveal.js is booted up via `initialize()`, it will go through all registered plugins and invoke their `init` methods. If the `init` method returns a Promise, reveal.js will wait for that promise to be fulfilled before finishing the startup sequence and firing the [ready](#ready-event) event. Here’s an example of a plugin that does some asynchronous work before reveal.js can proceed:
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```javascript
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let MyPlugin = {
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id: ’my-plugin’,
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init: deck => {
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return new Promise( resolve => setTimeout( resolve, 3000 ) )
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}
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};
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Reveal.initialize({
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plugins: [ MyPlugin ]
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}).then( () => {
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console.log( ’Three seconds later...’ )
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} );
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```
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Note that reveal.js will *not* wait for init Promise fulfillment if the plugin is loaded as an [async dependency](#dependencies). If the plugin’s init method does _not_ return a Promise, the plugin is considered ready right away and will not hold up the reveal.js startup sequence.
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### Retrieving Plugins
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If you want to check if a specific plugin is registered you can use the `Reveal.hasPlugin` method and pass in a plugin ID, for example: `Reveal.hasPlugin( ’myPlugin’ )`. If you want to retrieve a plugin instance you can use `Reveal.getPlugin( ’myPlugin’ )`.
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### Dependencies
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Reveal.js doesn’t _rely_ on any third party scripts to work but a few optional libraries are included by default. These libraries are loaded as dependencies in the order they appear, for example:
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```javascript
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Reveal.initialize({
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dependencies: [
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// Interpret Markdown in <section> elements
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{ src: ’plugin/markdown/marked.js’, condition: () => { return !!document.querySelector( ’[data-markdown]’ ); } },
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{ src: ’plugin/markdown/markdown.js’, condition: () => { return !!document.querySelector( ’[data-markdown]’ ); } },
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// Syntax highlight for <code> elements
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{ src: ’plugin/highlight/highlight.js’, async: true },
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// Zoom in and out with Alt+click
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{ src: ’plugin/zoom-js/zoom.js’, async: true },
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// Speaker notes
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{ src: ’plugin/notes/notes.js’, async: true },
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// MathJax
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{ src: ’plugin/math/math.js’, async: true }
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]
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});
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```
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You can add your own extensions using the same syntax. The following properties are available for each dependency object:
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- **src**: Path to the script to load
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- **async**: [optional] Flags if the script should load after reveal.js has started, defaults to false
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- **callback**: [optional] Function to execute when the script has loaded
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- **condition**: [optional] Function which must return true for the script to be loaded
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You can also include dependencies which are bundled/already present on the page. To include a bundled plugin. replace the `src` property with a reference to a `plugin` instance:
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- **plugin**: the plugin instance (see [Plugins](#plugins))
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### API
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The `Reveal` object exposes a JavaScript API for controlling navigation and reading state:
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@ -1441,30 +1467,6 @@ If you want to include math inside of a presentation written in Markdown you nee
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`$$ J(\theta_0,\theta_1) = \sum_{i=0} $$`
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```
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## Plugins
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Plugins should register themselves with reveal.js by calling `Reveal.registerPlugin( MyPlugin )`. Registered plugins _must_ expose a unique `id` property and can optionally expose an `init` function that reveal.js will call to initialize them.
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When reveal.js is booted up via `initialize()`, it will go through all registered plugins and invoke their `init` methods. If the `init` method returns a Promise, reveal.js will wait for that promise to be fulfilled before finishing the startup sequence and firing the [ready](#ready-event) event. Here's an example of a plugin that does some asynchronous work before reveal.js can proceed:
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```javascript
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let MyPlugin = {
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id: 'myPlugin',
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init: deck => new Promise( resolve => setTimeout( resolve, 3000 ) )
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};
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Reveal.initialize({
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dependencies: [ { plugin: MyPlugin } ]
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}).then( () => {
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console.log( 'Three seconds later...' )
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} );
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```
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Note that reveal.js will *not* wait for init Promise fulfillment if the plugin is loaded as an [async dependency](#dependencies). If the plugin's init method does _not_ return a Promise, the plugin is considered ready right away and will not hold up the reveal.js startup sequence.
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### Retrieving Plugins
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If you want to check if a specific plugin is registered you can use the `Reveal.hasPlugin` method and pass in a plugin ID, for example: `Reveal.hasPlugin( 'myPlugin' )`. If you want to retrieve a plugin instance you can use `Reveal.getPlugin( 'myPlugin' )`.
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## License
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MIT licensed
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