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docs for code highlight line numbering

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Hakim El Hattab 2019-04-01 15:45:07 +02:00 committed by GitHub
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@ -451,7 +451,7 @@ Reveal.initialize({
{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } }, { src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
// Syntax highlight for <code> elements // Syntax highlight for <code> elements
{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }, { src: 'plugin/highlight/highlight.js', async: true },
// Zoom in and out with Alt+click // Zoom in and out with Alt+click
{ src: 'plugin/zoom-js/zoom.js', async: true }, { src: 'plugin/zoom-js/zoom.js', async: true },
@ -917,7 +917,7 @@ Reveal.addEventListener( 'fragmenthidden', function( event ) {
} ); } );
``` ```
### Code syntax highlighting ### Code Syntax Highlighting
By default, Reveal is configured with [highlight.js](https://highlightjs.org/) for code syntax highlighting. To enable syntax highlighting, you'll have to load the highlight plugin ([plugin/highlight/highlight.js](plugin/highlight/highlight.js)) and a highlight.js CSS theme (Reveal comes packaged with the Monokai themes: [lib/css/monokai.css](lib/css/monokai.css)). By default, Reveal is configured with [highlight.js](https://highlightjs.org/) for code syntax highlighting. To enable syntax highlighting, you'll have to load the highlight plugin ([plugin/highlight/highlight.js](plugin/highlight/highlight.js)) and a highlight.js CSS theme (Reveal comes packaged with the Monokai themes: [lib/css/monokai.css](lib/css/monokai.css)).
@ -925,7 +925,7 @@ By default, Reveal is configured with [highlight.js](https://highlightjs.org/) f
Reveal.initialize({ Reveal.initialize({
// More info https://github.com/hakimel/reveal.js#dependencies // More info https://github.com/hakimel/reveal.js#dependencies
dependencies: [ dependencies: [
{ src: 'plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } }, { src: 'plugin/highlight/highlight.js', async: true },
] ]
}); });
``` ```
@ -944,6 +944,33 @@ Below is an example with clojure code that will be syntax highlighted. When the
</section> </section>
``` ```
#### Line Numbers & Highlights
To enable line numbers, add `data-line-numbers` to your `<code>` tags. If you want to highlight specific lines you can provide a comma separated list of line numbers using the same attribute. For example, in the following example lines 4 and 8-11 are highlighted:
```html
<pre><code class="hljs" data-line-numbers="4,8-11">
import React, { useState } from 'react';
function Example() {
const [count, setCount] = useState(0);
return (
<div>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>
Click me
</button>
</div>
);
}
</code></pre>
```
<img width="300" alt="line-numbers" src="https://user-images.githubusercontent.com/629429/55332077-eb3c4780-5494-11e9-8854-ba33cd0fa740.png">
### Slide number ### Slide number
If you would like to display the page number of the current slide you can do so using the `slideNumber` and `showSlideNumber` configuration values. If you would like to display the page number of the current slide you can do so using the `slideNumber` and `showSlideNumber` configuration values.