readme update for #505

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Hakim El Hattab 2013-07-14 17:47:49 -04:00
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@ -370,6 +370,8 @@ The display order of fragments can be controlled using the ```data-fragment-inde
When a slide fragment is either shown or hidden reveal.js will dispatch an event.
Some libraries, like MathJax (see #505), get confused by the initially hidden fragment elements. Often times this can be fixed by calling their update or render function from this callback.
```javascript
Reveal.addEventListener( 'fragmentshown', function( event ) {
// event.fragment = the fragment DOM element